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• iPhone UITableView populateing from connectionDidFinishLoading

  - by fourfour

  Hey all. I have been trying for hours to figure this out. I have some JSON from a NSURLConnection. This is working fine and I have parsed it into an array. But I can't seem to get the array out of the connectionDidFinishLoading method. I an am getting (null) in the UITableViewCell method. I am assuming this is a scope of retain issue, but I am so new to ObjC I am not sure what to do. Any help would be greatly appreciated. Cheers. -(void)connectionDidFinishLoading:(NSURLConnection *)connection { [connection release]; NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; [responseData release]; SBJSON *json = [[SBJSON alloc] init]; NSDictionary *results = [json objectWithString:responseString]; self.dataArray = [results objectForKey:@"data"]; NSMutableArray *tableArray = [[NSMutableArray alloc] initWithObjects:nil]; for (NSString *element in dataArray) { //NSLog(@"%@", [element objectForKey:@"name"]); NSString *tmpString = [[NSString alloc] initWithString:[element objectForKey:@"name"]]; [tableArray addObject:tmpString]; } } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; } // Configure the cell. //cell.textLabel.text = [self.tableView objectAtIndex:indexPath.row]; cell.textLabel.text = [self.tableArray objectAtIndex:indexPath.row]; NSLog(@"%@", tableArray); return cell; }

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• UIImage cropping on user selected rectangle in iphone?

  - by Rajendra Bhole

  Hi, I developing an small application in which i want to crop the UIImage captured by imagePickerControllerSourceTypeOfCamera. The UIImage should crop by user selected crop area or cropped rectangle. That means first user capture the image from the camera.Then on captured image the user selected an rectangle having color gray.That image(image data) should crop from that gray colored rectangle. My under develop code is as follows. -(IBAction) getPhoto:(id)sender { UIImagePickerController* imagePickerController = [[UIImagePickerController alloc] init]; imagePickerController.delegate = self; if((UIButton *) sender == btnphotoAlbum) { imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; } else { imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera; } imagePickerController.allowsImageEditing = YES; //imagePickerController.toolbar.barStyle =UIBarStyleBlackOpaque; //UIToolbar *toolBar=[[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 20, 320)]; //imagePickerController. [self presentModalViewController:imagePickerController animated:YES]; } (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo { UIImage *selectedImage = image; UIImage *originalImage = [editingInfo objectForKey:@"UIImagePickerControllerOriginalImage"]; NSValue *cropRect = [editingInfo objectForKey:UIImagePickerControllerCropRect]; CGRect theRect = [cropRect CGRectValue]; //captureImage.image =[info objectForKey:@"UIImagePickerControllerOriginalImage"]; [picker dismissModalViewControllerAnimated:YES]; } How i crop the image?

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• iPhone: Override UIButton buttonWithType to return subclass

  - by Amagrammer

  I want to be able to create a UIButton with an oversized responsive area. I know that one way to do that is to override the hitTest method in a subclass, but how do I instantiate my custom button object in the first place? [OversizedButton buttonWithType: UIButtonTypeDetailDisclosure]; doesn't work out of the box because buttonWithType returns a UIButton, not an OversizedButton. So it seems like I need to override the buttonWithType method as well. Does anyone know how to do this? @implementation OversizedButton + (id)buttonWithType:(UIButtonType)buttonType { // Construct and return an OversizedButton rather than a UIButton // Needs to handle special types such as UIButtonTypeDetailDisclosure // I NEED TO KNOW HOW TO DO THIS PART } - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event { // Return results if touch event was in oversized region // I ALREADY KNOW HOW TO DO THIS PART } @end Alternatively, maybe I could create the button using alloc/initWithFrame. But the buttonType property is readonly, so how do you create the custom button types? Note: I know there are other ways to do this, such as having an invisible button behind the visible one. I don't care for that approach and would prefer to avoid it. Any help on the approach described above would be very helpful. Thanks

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• iPhone SDK: Transparent tableviewcell isn't transparent?

  - by Harkonian

  I have a UITableViewController that has a background image. I am setting the image for the tableview like this: [self.view setBackgroundColor: [UIColor colorWithPatternImage: [UIImage imageWithContentsOfFile: [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent: @"background1.jpg"]]]]; The problem is, each of my custom tableview cells get the same background image--it's repeated in each cell. As a test, I tried making everything in my cell transparent with an alpha of 0.0, but even then although I can't see any of the labels in each cell, I still see the background image repeated in each cell: cell.backgroundColor = [UIColor clearColor]; cell.contentView.backgroundColor = [UIColor clearColor]; cell.contentView.alpha = 0.0; cell.alpha = 0.0; Any suggestions on how to get my table's background image to stop repeating in each cell would be appreciated!

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• iPhone XCODE Programming make a UIWebView Scrollable

  - by Antonio Murgia

  here is the problem! I have a UIWebView in my programs that loads a php page. The problem is that if the page has a lot of lines i cannot see them. I can "scroll" the UIWebView but when I leave the finger from the screen the page comes back to the original state. I don't want to scale pages to fit the view cause if I do that the letters become too small. I would like to find a way to scroll pages how it is possible in Safari. Hope i have explained the problem. Thank you in advance Antonio

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• iPhone hitTest broken after rotation

  - by Adam

  Hi all, I have a UIView that contains a number of CALayer subclasses. I am using the following code to detect which layer a touch event corresponds to: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; CGPoint touchPoint = [touch locationInView:self]; NSLog(@"%@,%@",NSStringFromCGPoint(point),[self.layer hitTest:point].name); } This works fine until the device is rotated. When the device is rotated all current layers are removed from the superlayer, and new CALayers are created to fit the new orientation. The new layers are correctly inserted and viewable in the correct orientation. After the rotation the hitTest method consistently returns nil when clearly clicking on the newly created layers and registers for locations of layers which are incorrect. The coordinates of the hit test are correct, but no layers are found. Am I missing a function call or something after handling the rotation? Cheers, Adam

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• iPhone:Tabbar item actions are not happening

  - by user187532

  Hello all, I created a window application, which has a tabbar controller with four tabbar items. Each tabbar items are linked with a tableview. I have also set Navigation bar for each tabbar items. I have appdelegate file, which calls the first tableview controller of which is set for first tabbar item. I am trying to retrieve and do an action whenever a tabbar item is clicked. For that, i tried to add "- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item" and "- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UITableViewController *)viewController" in my first tableview controller, but it is not at all responding whenever i click any tabbar items. My question is, if i create a window based application and added tabbar controller, tableview and navigation bar in .XIB file, is it not possible to access and do an action programatically whenever a tabbar item is clicked? (or) Am i doing anything wrong? Please help me to resolve this and share your ideas. Thanks.

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• Memory management in ObjC/iPhone

  - by Manu

  Hi, I have question in memory management (objective C). There are two ideal scenario. ============================= scenario 1 ======================================== (void) funcA { MyObj *c = [otherObj getMyObject]; [c release]; } -(MyObj *) getMyObject //(this method is available in other OtherObj.m file) { MyObj *temp = [[MyObj alloc] init]; // do smothing here return temp; } ============================= scenario 2 ======================================== (void) funcA { MyObj *c = [otherObj getMyObject]; } -(MyObj *) getMyObject //(this method is available in other OtherObj.m file) { MyObj *temp = [[myObj alloc] init]; // do smothing here return [temp autorelease]; } myObj is holding huge chunk of data. In first scenario I am getting myObj(allocated) from other file so I have to release in my own method. (as per any C/C++ language library ,like strdup will return string duplicate which will realase later by developer not by strdup method). In second scenario I am getting myObj(allocated) from otherObj.m file so otherObj.m file is responsible to release that allocated memory(mean autorelease)? Is it right? Please let me know Which scenario is more efficient and valid as per apple memory guidelines. Please Please don't show me any document link. Thanks Manu

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• Best FTP Objective-C wrapper for iPhone

  - by jamone

  I know you use the C based networking API to do FTP communication but I'd prefer to use something a little higher level. I've seen a few Objective-C based wrappers but I'm not sure what to use. I don't need that complex of FTP interaction. Its just the typical create/delete dirs, upload/download files... What do you recommend?

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• iPhone: In landscape-only, after first addSubview, UITableViewController doesn't rotate properly

  - by Clay Bridges

  A minimal illustrative Xcode project for this is available on github. On my UIWindow, when I add second (and subsequent) UITableView's as subviews, they do not rotate properly, and thus appear sideways. This is only tested in the Simulator. Here's a little code for you: - (void)applicationDidFinishLaunching:(UIApplication *)application { ShellTVC* viewA = [[ShellTVC alloc] initWithTitle:@"View A"]; ShellTVC* viewB = [[ShellTVC alloc] initWithTitle:@"View B"]; // The first subview added will rotate to landscape correctly. // Any subsequent subview added will not. // You may try this by various commentings and rearranging of these two statements. [window addSubview:[viewA tableView]]; [window addSubview:[viewB tableView]]; [window makeKeyAndVisible]; } viewB appears sideways. Comment out the addSubview for viewB, and viewA appears correctly. Do that for viewA only, and viewB appears correctly. I am not creating these UITableViewControllers via NIBs, though the UIWindow is. In case you are wondering, ShellTVC is-a UITableViewController, and implements this method: - (BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft); } Also, I have set the UIInterfaceOrientation in the plist file to UIInterfaceOrientationLandscapeLeft. Probably related -- and unanswered -- SO questions here and here.

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• iPhone SDK "White Flash" transition

  - by Extremely frustrated

  I want to make a button; when you press it the screen fades to a "flash of white" and back like in those powerpoint transitions. I'm thinking maybe dynamically changing the opacity of a white square or something? What do you think? Is there something like this that already exists like part of Catransitions or something? Thanks guys.

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• iPhone: CATiledLayer/UIScrollView wont scroll after zooming and only zooms to anchor point

  - by Brodie4598

  Here is the problem... I am using CA Tiled Layer to display a large jpg. The view loads okay, and when I go to scroll around, it works fine. However, as soon as I zoom in or out once, it scrolls to the top left (to the anchor point) and will not scroll at all. The zooming works fine, but I just cannot scroll. Here is my code: #import <QuartzCore/QuartzCore.h> #import "PracticeViewController.h" @implementation practiceViewController //@synthesize image; - (void)viewDidLoad { NSString *path = [[NSBundle mainBundle] pathForResource:@"H-5" ofType:@"jpg"]; NSData *data = [NSData dataWithContentsOfFile:path]; image = [UIImage imageWithData:data]; CGRect pageRect = CGRectMake(0, 0, image.size.width, image.size.height); CATiledLayer *tiledLayer = [CATiledLayer layer]; tiledLayer.anchorPoint = CGPointMake(0.0f, 1.0f); tiledLayer.delegate = self; tiledLayer.tileSize = CGSizeMake(1000, 1000); tiledLayer.levelsOfDetail = 6; tiledLayer.levelsOfDetailBias = 0; tiledLayer.bounds = pageRect; tiledLayer.transform = CATransform3DMakeScale(1.0f, -1.0f, 0.3f); myContentView = [[UIView alloc] initWithFrame:self.view.bounds]; [myContentView.layer addSublayer:tiledLayer]; UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds]; scrollView.delegate = self; scrollView.contentSize = pageRect.size; scrollView.minimumZoomScale = .2; scrollView.maximumZoomScale = 1; [scrollView addSubview:myContentView]; [self.view addSubview:scrollView]; } - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView { return myContentView; } - (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx { NSString *path = [[NSBundle mainBundle] pathForResource:@"H-5" ofType:@"jpg"]; NSData *data = [NSData dataWithContentsOfFile:path]; image = [UIImage imageWithData:data]; CGRect imageRect = CGRectMake (0.0, 0.0, image.size.width, image.size.height); CGContextDrawImage (ctx, imageRect, [image CGImage]); } @end

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• [Stanford iTunes U] iPhone - creating outlets and actions on object from Interface Builder

  - by Nippysaurus

  In the initial lecture "1. Introduction to Mac OS X, Cocoa touch, Objective-C and Tools" the students are instructed to drag an "Object" into interface builder and set the class actions and outlets. I do not seem to have this ability in my interface builder. Was it removed or disabled in more recent versions?

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• problem FFmpeg avcodec_register_all iphone

  - by samantha

  Hi, I need to use ffmpeg for encodig. I have all *.a. My problem is tha when I use avcodec_register_all() xcode give me this error: "_deflate", referenced from: _encode_frame in libavcodec.a(pngenc.o) _encode_frame in libavcodec.a(pngenc.o) _encode_frame in libavcodec.a(pngenc.o) _encode_frame in libavcodec.a(lclenc.o) _encode_frame in libavcodec.a(lclenc.o) _encode_frame in libavcodec.a(zmbvenc.o) "_deflateEnd", referenced from: _flashsv_encode_end in libavcodec.a(flashsvenc.o) _encode_frame in libavcodec.a(pngenc.o) _encode_end in libavcodec.a(lclenc.o) _encode_end in libavcodec.a(zmbvenc.o) "_compress", referenced from: _encode_strip in libavcodec.a(tiffenc.o) (maybe you meant: _mp3_header_compress_bsf$non_lazy_ptr, _mp3_header_compress_bsf ) "_vorbis_analysis_init", referenced from: _oggvorbis_encode_init in libavcodec.a(libvorbis.o) "_lame_set_bWriteVbrTag", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) "_lame_set_VBR", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) "_crc32", referenced from: _png_write_chunk in libavcodec.a(pngenc.o) _png_write_chunk in libavcodec.a(pngenc.o) _png_write_chunk in libavcodec.a(pngenc.o) "_x264_encoder_headers", referenced from: _X264_init in libavcodec.a(libx264.o) "_lame_encode_buffer", referenced from: _MP3lame_encode_frame in libavcodec.a(libmp3lame.o) "_x264_encoder_encode", referenced from: _X264_frame in libavcodec.a(libx264.o) "_vorbis_comment_add_tag", referenced from: _oggvorbis_encode_init in libavcodec.a(libvorbis.o) "_theora_encode_tables", referenced from: _encode_init in libavcodec.a(libtheoraenc.o) "_vorbis_block_init", referenced from: _oggvorbis_encode_init in libavcodec.a(libvorbis.o) "_x264_nal_encode", referenced from: _X264_frame in libavcodec.a(libx264.o) _X264_init in libavcodec.a(libx264.o) "_uncompress", referenced from: _decode_frame in libavcodec.a(cscd.o) _decode_frame in libavcodec.a(dxa.o) _svq3_decode_init in libavcodec.a(h264.o) _decode_frame in libavcodec.a(tiff.o) "_xvid_plugin_2pass2", referenced from: _ff_xvid_rate_control_init in libavcodec.a(libxvid_rc.o) _ff_xvid_rate_estimate_qscale in libavcodec.a(libxvid_rc.o) _ff_xvid_rate_estimate_qscale in libavcodec.a(libxvid_rc.o) _ff_xvid_rate_control_uninit in libavcodec.a(libxvid_rc.o) _xvid_plugin_2pass2$non_lazy_ptr in libavcodec.a(libxvidff.o) (maybe you meant: _xvid_plugin_2pass2$non_lazy_ptr) "_lame_set_num_channels", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) "_lame_set_VBR_q", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) "_vorbis_analysis_buffer", referenced from: _oggvorbis_encode_frame in libavcodec.a(libvorbis.o) "_compress2", referenced from: _flashsv_encode_frame in libavcodec.a(flashsvenc.o) "_inflateEnd", referenced from: _decode_frame in libavcodec.a(pngdec.o) _flashsv_decode_end in libavcodec.a(flashsv.o) _decode_end in libavcodec.a(lcldec.o) _decode_end in libavcodec.a(tscc.o) _decode_end in libavcodec.a(zmbv.o) "_lame_encode_buffer_interleaved", referenced from: _MP3lame_encode_frame in libavcodec.a(libmp3lame.o) "_theora_comment_clear", referenced from: _encode_init in libavcodec.a(libtheoraenc.o) "_x264_encoder_close", referenced from: _X264_close in libavcodec.a(libx264.o) "_inflate", referenced from: _decode_frame in libavcodec.a(pngdec.o) _flashsv_decode_frame in libavcodec.a(flashsv.o) _flashsv_decode_frame in libavcodec.a(flashsv.o) _decode_frame in libavcodec.a(lcldec.o) _decode_frame in libavcodec.a(lcldec.o) _decode_frame in libavcodec.a(lcldec.o) _decode_frame in libavcodec.a(tscc.o) _decode_frame in libavcodec.a(zmbv.o) "_theora_comment_init", referenced from: _encode_init in libavcodec.a(libtheoraenc.o) "_vorbis_info_init", referenced from: _oggvorbis_encode_init in libavcodec.a(libvorbis.o) "deflateInit2", referenced from: _encode_frame in libavcodec.a(pngenc.o) "_deflateReset", referenced from: _encode_frame in libavcodec.a(lclenc.o) _encode_frame in libavcodec.a(zmbvenc.o) "_theora_encode_init", referenced from: _encode_init in libavcodec.a(libtheoraenc.o) "_lame_get_framesize", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) "_vorbis_analysis", referenced from: _oggvorbis_encode_frame in libavcodec.a(libvorbis.o) "_inflateReset", referenced from: _flashsv_decode_frame in libavcodec.a(flashsv.o) _decode_frame in libavcodec.a(lcldec.o) _decode_frame in libavcodec.a(lcldec.o) _decode_frame in libavcodec.a(tscc.o) _decode_frame in libavcodec.a(zmbv.o) "_lame_set_disable_reservoir", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) "_inflateSync", referenced from: _flashsv_decode_frame in libavcodec.a(flashsv.o) "_vorbis_info_clear", referenced from: _oggvorbis_encode_close in libavcodec.a(libvorbis.o) "_theora_encode_header", referenced from: _encode_init in libavcodec.a(libtheoraenc.o) "_theora_clear", referenced from: _encode_close in libavcodec.a(libtheoraenc.o) "_theora_info_clear", referenced from: _encode_init in libavcodec.a(libtheoraenc.o) "_xvid_plugin_lumimasking", referenced from: _xvid_plugin_lumimasking$non_lazy_ptr in libavcodec.a(libxvidff.o) (maybe you meant: _xvid_plugin_lumimasking$non_lazy_ptr) "_theora_encode_comment", referenced from: _encode_init in libavcodec.a(libtheoraenc.o) "_lame_set_brate", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) _MP3lame_encode_init in libavcodec.a(libmp3lame.o) "_theora_encode_YUVin", referenced from: _encode_frame in libavcodec.a(libtheoraenc.o) "_lame_init", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) "_lame_set_mode", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) "deflateInit", referenced from: _encode_init in libavcodec.a(lclenc.o) _encode_init in libavcodec.a(zmbvenc.o) "_vorbis_encode_setup_managed", referenced from: _oggvorbis_encode_init in libavcodec.a(libvorbis.o) "_lame_set_quality", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) _MP3lame_encode_init in libavcodec.a(libmp3lame.o) "_vorbis_analysis_blockout", referenced from: _oggvorbis_encode_frame in libavcodec.a(libvorbis.o) _oggvorbis_encode_frame in libavcodec.a(libvorbis.o) "_vorbis_analysis_wrote", referenced from: _oggvorbis_encode_frame in libavcodec.a(libvorbis.o) _oggvorbis_encode_frame in libavcodec.a(libvorbis.o) _oggvorbis_encode_close in libavcodec.a(libvorbis.o) "inflateInit", referenced from: _decode_frame in libavcodec.a(pngdec.o) _flashsv_decode_init in libavcodec.a(flashsv.o) _decode_init in libavcodec.a(lcldec.o) _decode_init in libavcodec.a(tscc.o) _decode_init in libavcodec.a(zmbv.o) "_vorbis_comment_clear", referenced from: _oggvorbis_encode_init in libavcodec.a(libvorbis.o) "_vorbis_bitrate_addblock", referenced from: _oggvorbis_encode_frame in libavcodec.a(libvorbis.o) "_lame_set_in_samplerate", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) "_vorbis_encode_ctl", referenced from: _oggvorbis_encode_init in libavcodec.a(libvorbis.o) "_x264_param_default", referenced from: _X264_init in libavcodec.a(libx264.o) "_theora_info_init", referenced from: _encode_init in libavcodec.a(libtheoraenc.o) "_vorbis_encode_setup_init", referenced from: _oggvorbis_encode_init in libavcodec.a(libvorbis.o) "_vorbis_comment_init", referenced from: _oggvorbis_encode_init in libavcodec.a(libvorbis.o) "_vorbis_bitrate_flushpacket", referenced from: _oggvorbis_encode_frame in libavcodec.a(libvorbis.o) _oggvorbis_encode_frame in libavcodec.a(libvorbis.o) "_xvid_plugin_single", referenced from: _xvid_plugin_single$non_lazy_ptr in libavcodec.a(libxvidff.o) (maybe you meant: _xvid_plugin_single$non_lazy_ptr) "_xvid_global", referenced from: _ff_xvid_encode_init in libavcodec.a(libxvidff.o) "_xvid_encore", referenced from: _ff_xvid_encode_close in libavcodec.a(libxvidff.o) _ff_xvid_encode_init in libavcodec.a(libxvidff.o) _ff_xvid_encode_frame in libavcodec.a(libxvidff.o) "_vorbis_encode_setup_vbr", referenced from: _oggvorbis_encode_init in libavcodec.a(libvorbis.o) "_lame_set_out_samplerate", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) "_lame_init_params", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) "_vorbis_block_clear", referenced from: _oggvorbis_encode_close in libavcodec.a(libvorbis.o) "_lame_encode_flush", referenced from: _MP3lame_encode_frame in libavcodec.a(libmp3lame.o) "_x264_encoder_open", referenced from: _X264_init in libavcodec.a(libx264.o) "_lame_close", referenced from: _MP3lame_encode_init in libavcodec.a(libmp3lame.o) _MP3lame_encode_close in libavcodec.a(libmp3lame.o) "_vorbis_dsp_clear", referenced from: _oggvorbis_encode_close in libavcodec.a(libvorbis.o) "_vorbis_analysis_headerout", referenced from: _oggvorbis_encode_init in libavcodec.a(libvorbis.o) "_theora_encode_packetout", referenced from: _encode_frame in libavcodec.a(libtheoraenc.o) _encode_close in libavcodec.a(libtheoraenc.o) ld: symbol(s) not found collect2: ld returned 1 exit status Also whene i use [code] codec = avcodec_find_encoder(CODEC_ID_H264); //CODEC_ID_H264 //codec = avcodec_find_encoder_by_name("mpeg1"); if (!codec) { fprintf(stderr, "codec not found\n"); exit(1); }[/code] codec is always null where is my error? best regards

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• UITextView Bold Font iphone sdk

  - by Momeks

  Hi , iam trying to bold / italic text but i use this code to bold my font but when i press bold button whole the UITExtView going to bold but i want select some text and bold / italic or change the color of them .. textPad.font = [UIFont boldSystemFontOfSize:12];

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• iphone: UIwebview curl effect

  - by eshalev

  Hello, I would like to make a standard view container which will give me the curl animation effect on multiple views. Something like uiscrollview and paging, only with a different animation(curl). I will be using UIwebviews as my separate pages. The problem: I do not know how to trap swipes in UIwebviews, But I see that UIscrollview implments this (swiping a uiwebview in a uiscrollview will bring me to the next view). I am therefore assuming that the implmentation of UIscrollview is trapping UIwebview swipes. How can i achieve the same functionality? I also need the UIWebview to keep functioning (as when embedding it in a uiscrollview)

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• iPhone NSXMLParser parsing string and storing in a NSNumber variable and different data types

  - by anubhav

  Hi, I am trying to parse a XML File using NSXMLParser, I also have a Container class, in which I have a few instance variables. One of the elements that I am trying to parse in the XML is: <book sn="32.859669048339128" pn="-116.917800670489670"> I am trying to save the value of sn and pn in an instance variable of object Container: NSNumber *sn, NSNumber *pn. I want it so that when my parser get the attributeValues it can save it as a Double (or float) in those NSNumber pointers. Right now, all it does it just saves a string to the NSNumber. The Parser Code looks like this: if([elementName isEqualToString:@"book"]){ container = [[Container alloc] init]; container.sn=[attributeDict objectForKey:@"sn"]; container.pn=[attributeDict objectForKey:@"pn"]; } I want it so that the type of container.sn is initialized to a float or double. Any ideas how to do this? Thanks in advance!

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• switch views using a button, going to a table view, iphone

  - by Jaime Rae

  My program has 4 buttons and each button calls a different table view. That works fine, but my problem is, the view controller I'm using brings up a table view that covers up my navigation bar and my tab bar. I need to replace that coding with something that will bring up a table and not cover up my nav and tab bars. Here is the coding I'm using: -(IBAction)buttonNorthWest { NorthWestViewController *nwController = [[NorthWestViewController alloc] initWithNibName:@"NorthWestView" bundle:nil]; self.nwViewController = nwController; [self.view insertSubview:nwViewController.view atIndex:0]; [self presentModalViewController:nwViewController animated:YES]; [nwController release]; } The [self presentModalViewController....] is the problem. Does anyone know how I can replace that code with something that keeps my nav and tab bars? Thanks, Jaime

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• Base64 en/decoding between xstream and iPhone SDK

  - by Matt McMinn

  I am passing a byte array from a java server to an iPad client in XML. The server is using xstream to convert the byte array to XML with the EncodedByteArrayConverter, which should convert the array to Base 64. Using xstream, I can decode the xml back to the proper byte array in a java client, but in the iPad client, I'm getting an invalid length error. To do my decoding, I'm using the code at the bottom of this page. The length of the string is indeed not a multiple of 4, so there must be something strange with my string - although since xstream can decode it just fine, I'm guessing there's just something I need to to on the iPad side to get it to decode. I've tried cutting off padding at the end of the string to get it down to the right size, and that does allow the decoder to work, but I end up with JPG's that have invalid headers, and are not displayable. On the server side, I'm using the following code: Object rtrn = getByteArray(); XStream xstream = new XStream(); String xml = xstream.toXML(rtrn); On the client side, I'm calling the above decoder from the XML parsing callback like this: -(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { NSLog(@"Converting data; string length: %d", [string length]); //NSLog(@"%@", string); NSData *data = [Base64 decode:string]; NSLog(@"converted data length: %d", [data length]); } Any ideas what could be going wrong?

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• iphone audio streaming

  - by mobapps99

  Hi , i'm developing an application which uses audio streaming. For streaming audio from internet i'm using the AudioStreamer class. The audio streamer has four state isPlaying, isPaused ,isWaiting, and isIdle . My problem is that when the audio streamer is in the state "isWaiting" and at that time if i get a phone call Audio queue fails giving the error "Audio queue start failed." Any has solution for this? help....

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• iPhone SDK: How to add an image to a UIBarButton?

  - by iPhone Developer

  I have used the code below to create a button on the nav bar with an image. I can see the image but I can also see the border of the button around it. My question is, how can I get rid of the button border. All I want to see is the image on the nav bar, no border. UIBarButtonItem *settingsBtn = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"icon_prefs.png"] style:UIBarButtonItemStylePlain target:self action:@selector(openSettings:)]; [[self navigationItem] setLeftBarButtonItem:settingsBtn]; [settingsBtn release]; Thanks in advance. Any pointers, links to read further or examples appreciated.

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• Create a group(ABGroup) and add person record to the group programatically in iphone

  - by satish

  Im creating a group using ABGroupCreate(), i have 10 person(ABPerson) records. Im using ABGroupAddMember function inorder to add the person to the group, but the person record is not getting added into the group. Yes im saving the addressbook. Am i missing something here, i need help this on.

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• Objective-C (iPhone) Memory Management

  - by Steven

  I'm sorry to ask such a simple question, but it's a specific question I've not been able to find an answer for. I'm not a native objective-c programmer, so I apologise if I use any C# terms! If I define an object in test.h @interface test : something { NSString *_testString; } Then initialise it in test.m -(id)init { _testString = [[NSString alloc] initWithString:@"hello"]; } Then I understand that I would release it in dealloc, as every init should have a release -(void)dealloc { [_testString release]; } However, what I need clarification on is what happens if in init, I use one of the shortcut methods for object creation, do I still release it in dealloc? Doesn't this break the "one release for one init" rule? e.g. -(id)init { _testString = [NSString stringWithString:@"hello"]; } Thanks for your helps, and if this has been answered somewhere else, I apologise!! Steven

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• iphone tableview within detailview

  - by pete

  Hi, im pushing a "detailview" to a navigationcontroller (RootViewController.m) [self.navigationController pushViewController:MyDetailView animated:YES]; "detailview" contains a tableview (DetailViewController.m) - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { //push seconddetailview into navigationcontroller - how can i do that? } how do i load the seconddetailView into the main navigationcontroller? thanks pete

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• iPhone: NSTimer Countdown (Display Minutes:Seconds)

  - by user298261

  Hello! I have my timer code set up, and it's all kosher, but I want my label to display "Minutes : seconds" instead of just seconds. -(void)countDown{ time -= 1; theTimer.text = [NSString stringWithFormat:@"%i", time]; if(time == 0) { [countDownTimer invalidate]; } } I've already set "time" to 600, or 10 minutes. However, I want the display to show 10:59, 10:58, etc. until it reaches zero. How do I do this? Thanks!

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