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  • Great UIKit/Objective-C code snippets

    - by Nissan Fan
    New to Objective-C iPhone/iPod touch/iPad development, but I'm starting to discover lots of power in one-liners of code such as this: [UIApplication sharedApplication].applicationIconBadgeNumber = 10; Which will display that distinctive red notification badge on your app iphone with the number 10. Please share you favorite one or two-liners in Objective-C for the iPhone/iPod touch/iPad here. PUBLIC APIs ONLY.

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  • Yet another UITableView Question

    - by barbgal
    Hi, I have a strange issue in my iPhone application. I have created a UITableView with 4 Sections and 3 Rows so totally 12 Rows. But - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath The above method only gets called for 9 times instead of 12 times.why this happenning. My 4th section is not getting constructed but my 1st section gets duplicated as 4th section. Thanks for your time and help. Plese refer my code below @interface MainViewController : UITableViewController<UITextFieldDelegate,UITableViewDelegate,UITableViewDataSource> { } @end // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { CGRect frameRect = CGRectMake(0,0,320,460); UITableView *tableView = [[UITableView alloc] initWithFrame:frameRect style:UITableViewStyleGrouped]; tableView.delegate = self; tableView.dataSource = self; tableView.backgroundColor = [UIColor purpleColor]; tableView.scrollEnabled = YES; self.view = tableView; [tableView release]; [super viewDidLoad]; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { // Return the number of rows in the section. return 3; } - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { // Return the number of sections. return 4; } // Customize the appearance of table view cells. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { NSLog(@"CELL IS NIL %i", indexPath.section); static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; if (indexPath.section == 0) { if(indexPath.row == 0) { cell.text = @"Tmail"; UITextField *aField = [[UITextField alloc]initWithFrame:CGRectMake(100,10,200,40)]; aField.placeholder = @"Mandatory"; aField.delegate = self; aField.textColor = [UIColor blackColor]; [cell addSubview:aField]; [aField release]; } else if ( indexPath.row == 1 ) { cell.text = @"English"; UITextField *aField = [[UITextField alloc]initWithFrame:CGRectMake(100,10,200,40)]; aField.placeholder = @"Mandatory"; aField.delegate = self; aField.textColor = [UIColor blackColor]; [cell addSubview:aField]; [aField release]; } else { cell.text = @"Hindi"; UITextField *aField = [[UITextField alloc]initWithFrame:CGRectMake(100,10,200,40)]; aField.placeholder = @"Mandatory"; aField.delegate = self; aField.textColor = [UIColor blackColor]; [cell addSubview:aField]; [aField release]; } } else if (indexPath.section == 1) { if(indexPath.row == 0) { cell.text = @"Street"; UITextField *aField = [[UITextField alloc]initWithFrame:CGRectMake(100,10,200,40)]; aField.placeholder = @"Mandatory"; aField.delegate = self; aField.textColor = [UIColor blackColor]; [cell addSubview:aField]; [aField release]; } else if ( indexPath.row == 1 ) { cell.text = @"City"; UITextField *aField = [[UITextField alloc]initWithFrame:CGRectMake(100,10,200,40)]; aField.placeholder = @"Mandatory"; aField.delegate = self; aField.textColor = [UIColor blackColor]; [cell addSubview:aField]; [aField release]; } else { cell.text = @"State"; UITextField *aField = [[UITextField alloc]initWithFrame:CGRectMake(100,10,200,40)]; aField.placeholder = @"Mandatory"; aField.delegate = self; aField.textColor = [UIColor blackColor]; [cell addSubview:aField]; [aField release]; } } else if (indexPath.section == 2) { if(indexPath.row == 0) { cell.text = @"Salem"; UITextField *aField = [[UITextField alloc]initWithFrame:CGRectMake(100,10,200,40)]; aField.placeholder = @"Mandatory"; aField.delegate = self; aField.textColor = [UIColor blackColor]; [cell addSubview:aField]; [aField release]; } else if ( indexPath.row == 1 ) { cell.text = @"Samalpatti"; UITextField *aField = [[UITextField alloc]initWithFrame:CGRectMake(100,10,200,40)]; aField.placeholder = @"Mandatory"; aField.delegate = self; aField.textColor = [UIColor blackColor]; [cell addSubview:aField]; [aField release]; } else { cell.text = @"Chennai"; UITextField *aField = [[UITextField alloc]initWithFrame:CGRectMake(100,10,200,40)]; aField.placeholder = @"Mandatory"; aField.delegate = self; aField.textColor = [UIColor blackColor]; [cell addSubview:aField]; [aField release]; } } else if (indexPath.section == 3) { if(indexPath.row == 0) { cell.text = @"NOKIA"; UITextField *aField = [[UITextField alloc]initWithFrame:CGRectMake(100,10,200,40)]; aField.placeholder = @"Mandatory"; aField.delegate = self; aField.textColor = [UIColor blackColor]; [cell addSubview:aField]; [aField release]; } else if ( indexPath.row == 1) { cell.text = @"SAMSUNG"; UITextField *aField = [[UITextField alloc]initWithFrame:CGRectMake(100,10,200,40)]; aField.placeholder = @"Mandatory"; aField.delegate = self; aField.textColor = [UIColor blackColor]; [cell addSubview:aField]; [aField release]; } else { cell.text = @"SONY"; UITextField *aField = [[UITextField alloc]initWithFrame:CGRectMake(100,10,200,40)]; aField.placeholder = @"Mandatory"; aField.delegate = self; aField.textColor = [UIColor blackColor]; [cell addSubview:aField]; [aField release]; } } } return cell; }

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  • How to get the same UITableViewCell layout as in the Address Book app?

    - by Romain
    Hi, I currently have a custom UITableViewCell which contains a few labels, and an image. The "main" label is used to display people's names. Currently, I'm styling it in bold text. What I'd like to do (to gain some space and readability), is to mimic the Address Book app cell style, that is: first name in light text, and family name in bold text. Is there a way to do this using the same UILabel? Or, should I use 2 different UILabels? How should I layout them, without knowing their sizes? Thanks in advance for your assistance!

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  • NSAlert doesn't work

    - by Marco
    Hello i have implemented the following NSAlert: NSString *title = [NSString stringWithFormat:@"Keine Internetverbindung"]; NSString *alertMessage = [NSString stringWithFormat:@"Es konnte keine Verbindung zu www.sip.de aufgebaut werden!"]; NSString *ok = [NSString stringWithFormat:@"Ok"]; UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title message:alertMessage delegate:self cancelButtonTitle:ok otherButtonTitles:nil]; [alert show]; [alert release]; and this is the delegate method to close the app: - (void)alertView:(UIAlertView *)alertView didDisMissWithButtonIndex:(NSInteger)buttonIndex{ exit(3); } But why the programm doesn't go into the method, what is my mistake? greetings Marco

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  • is there a default back key(on device) listener in android???

    - by androidbase Praveen
    hi all, i am having two activities A and B. when i click the button in A that will shows B. when i click the Button in B it backs to A. i had set the overridePendingTransition method after the finish() method. it works properly. but in case the current Activity is B. on that time i click the default back button in the device. it shows the right to left transition to show the Activity A. how i can listen that Default back key on device.?????

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  • Packaging a Bundle with a static library

    - by 4thSpace
    I have a static library that includes some xibs. These will basically be the same across projects. I'd like to include the xibs as part of the library. I can include their veiwcontrollers, reference these controllers in the calling project but then there isn't a xib to load. When I right click the xib in the library project, it can't be part of the target. I thought about creating a CFPluginBundle but that creates a new project. I'd loose all of my IBOutlet and IBAction references. What is the best way to reuse xibs that also have outlets and actions to specific controllers?

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  • How can we change color of a text programmatically ?

    - by user297535
    My code is -(UIImage *)addText:(UIImage *)img text:(NSString *)text1{ int w = img.size.width; int h = img.size.height; CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst); CGContextDrawImage(context, CGRectMake(0, 0, w, h), img.CGImage); CGContextSetRGBFillColor(context, 0.0, 0.0, 1.0, 1); char* text = (char *)[text1 cStringUsingEncoding:NSASCIIStringEncoding]; CGContextSelectFont(context, "Arial", 18, kCGEncodingMacRoman); CGContextSetTextDrawingMode(context, kCGTextFill); CGContextSetRGBFillColor(context, 255, 255, 255, 2); CGContextShowTextAtPoint(context, 10, 170, text, strlen(text)); CGImageRef imageMasked = CGBitmapContextCreateImage(context); CGContextRelease(context); CGColorSpaceRelease(colorSpace); return [UIImage imageWithCGImage:imageMasked]; } -(UIImage *)addText:(UIImage *)img text:(NSString *)text1{ int w = img.size.width; int h = img.size.height; CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst); CGContextDrawImage(context, CGRectMake(0, 0, w, h), img.CGImage); CGContextSetRGBFillColor(context, 0.0, 0.0, 1.0, 1); char* text = (char *)[text1 cStringUsingEncoding:NSASCIIStringEncoding]; CGContextSelectFont(context, "Arial", 18, kCGEncodingMacRoman); CGContextSetTextDrawingMode(context, kCGTextFill); CGContextSetRGBFillColor(context, 255, 255, 255, 2); CGContextShowTextAtPoint(context, 10, 170, text, strlen(text)); CGImageRef imageMasked = CGBitmapContextCreateImage(context); CGContextRelease(context); CGColorSpaceRelease(colorSpace); return [UIImage imageWithCGImage:imageMasked]; } How can we change the color of the text programmatically? Answers will be greatly appreciated!

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  • How to troubleshoot deallocation of object in uitableview?

    - by 4thSpace
    I have a table view with tall cells. About 300 in height. The cells are custom and have an associated nib. In cellForRowAtIndexPath, I access an object in an array using indexPath.row. The object has properties, which I assign to labels on the custom cell. This works fine for the first two cells. Once I scroll enough for the third cell to get created, the app crashes. I have NSZombieEnabled set and here is the output: 2010-04-19 21:48:13.360 MyApp[54463:207] *** -[CALayer release]: message sent to deallocated instance 0xfc4e50 (gdb) continue 2010-04-19 21:48:18.382 MyApp[54463:207] *** NSInvocation: warning: object 0xfc4e50 of class '_NSZombie_CALayer' does not implement methodSignatureForSelector: -- trouble ahead 2010-04-19 21:48:18.383 MyApp[54463:207] *** NSInvocation: warning: object 0xfc4e50 of class '_NSZombie_CALayer' does not implement doesNotRecognizeSelector: -- abort (gdb) continue Program received signal: “EXC_BAD_ACCESS”. (gdb) I'm not sure what is deallocated. How can I trace this to the source?

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  • Avoid hardcoding iPhone screen size with programmatic view creation

    - by miorel
    Hi, I was looking up how to create a view programmatically and found the following example code: self.view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)]; This works great, except I don't like that it hardcodes the size of the screen. Is there a way to look up the size of the screen? An important point someone brought up is that if the app is running during a phone call then the screen will be slightly smaller because of the green "return to call" bar.

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  • Adding a UIBarButtonItem to a programattically allocated UINavigationBar

    - by iamdadude
    I have a cameraoverlayview that allocates a UINavigationBar to the top of the screen like this - CGRect navbarFrame = CGRectMake(0, 0, 320, 44); navigationBar = [[UINavigationBar alloc] initWithFrame:navbarFrame]; navigationBar.delegate = self; Now I want to add a UIBarButtonItem as the left button to the navigation bar, but the standard navigationbar.leftitem doesn't work. So I tried doing this - closebutton = [[UIBarButtonItem alloc] initWithTitle:closebuttontext style:UIBarButtonItemStylePlain target:self action:@selector(close)]; navigationBar.topItem.leftBarButtonItem = closebutton; But it doesn't work either. Can anyone point me in the right direction? As far as the navigation bar loading up correctly in the cameraoverlayview, it works 100%.

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  • Mapkit: Only show annotations in current view

    - by Nic Hubbard
    Instead of loading all annotations that are in my array, I would only like to load the annotations that the user could currently see cased on how far they are zoomed in on the map. So, if the user pans to a place where there are annotations, those would be added, and if they pan away, those would be removed. I assume this would help with memory. Does anyone know how to do something like this? And, is it worth it, or needed?

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  • iPhone offline reading

    - by Andy
    Hi, first of all - I am quite new to iPhone App development (3 months). I am working for a software company that offers a content management system. Our customers are for the main part publishing houses for magazines. They use our software to write articles to their homepages. Now we want to offer iPhone Applications to go with our cms. What I have accomplished so far is an RSS reader that shows newly published articles in a list view. The user selects one article and is redirected to a specially formatted detail view of this article. The next step is to add offline reading capabilities. I have searched the internet up and down but couldn't find anything like a best practice for that. I get it that there are two possibilities in general: Store the contents of the uiwebview locally on the iPhone/iPad (including css, images, js and so on). There would be the need to rework the basic html to use the downloaded css, images and js. Also I would have to somehow edit hyperlinks to following pages in multipage articles - Sounds like a lot of work ;) Create a PDF on the server side and download that to the mobile device. Rework the RSS Source to point to the locally saved pdf instead of the website on the server. My question is - what is the better way to go? Are there any downsides for either of the possibilities? Are there other (simple ;)) ways to implement offline reading features? Are there possibly any howto's that I could've missed? Thanks y'all!

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  • NSURL doesn't work any time

    - by Marco
    Hello community, i have the following problem sometimes my openURL-Dialog works perfectly, then i looked at the variable from the url and that is the variable: www.brehm-gmbh.de but some other times there are some crazy elements at the end of the variable like this: www.adamczyk-fenster.de%E2%80%8E i get this pages from an .asc file and both are in this file normal without this elements, what can i do to solve this problem? thank you all for helping beforehand

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  • Dragging a Sprite (Cocos2D) while Chipmunk is simulating

    - by itai alter
    Hello all! I have a simple project built with Cocos2D and Chipmunk. So far it's just a Ball (body, shape & sprite) bouncing on the Ground (a static line segment at the bottom of the screen). I implemented the ccTouchesBegan/Moved/Ended methods to drag the ball around. I've tried both: cpBodySlew(ballBody, touchPoint, 1.0/60.0f); and ballBody->p = cgPointMake(touchPoint.x,touchPoint.y); and while the Ball does follow my dragging, it's still being affected by gravity and it tries to go down (which causes velocity problems and others). Does anyone know of the preferred way to Drag an active Body while the physics simulation is going on? Do I need somehow to stop the simulation and turn it back on afterwards? Thanks!

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  • NSLog(@"%@",super) crashing

    - by Chandan Shetty SP
    I used NSLog(@"%@",super) in a method(any method) and it is crashing.... Why? How to print the super contents? Updated : currentclassname : superClassName { } and also if i use NSLog(@"%@", [super description]); It is printing "<currentclassname: 0x3db7230>" instead of superClassName... It is expected to print superClassName right. Thanks in advance,

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  • How should I load a xib into a detail view for a split view iPad objective app?

    - by editor
    I've got a split view iPad app with table view in the master pane. After drilling down several levels, each time loading a new .xib, I'd like one of the cells to trigger a web page load in the detail pane. Right now I can only get the web page .xib to load in the master pane side -- which is a master pain in my side. The basic load call where "URLWindow" is a class loaded with initWithNibName: [[self navigationController] pushViewController:URLWindow animated:YES]; I want to do this, but it doesn't seem to work: @interface @property (nonatomic, retain) IBOutlet DetailViewController *detailViewController; ... @implementation [[self detailViewController] pushViewController:URLWindow animated:YES]; How should I be loading the URLWindow .xib into a detail view for a split view detail pane?

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  • Save options selected in AlertDialog spawned from ItemizedOverlay onTap method

    - by ahsteele
    In the description of how to add a list of options to an AlertDialog the official Android documentation alludes to saving a users preferences with one of the "data storage techniques." The examples assume the AlertDialog has been spawned within an Activity class. In my case I've created a class that extends ItemizedOverlay. This class overrides the onTap method and uses an AlertDialog to prompt the user to make a multi-choice selection. I would like to capture and persist the selections for each OverlayItem they tap on. That said I am unsure if utilizing an AlertDialog in this manner is the right approach and open to other suggestions. protected boolean onTap(int index) { OverlayItem item = _overlays.get(index); final CharSequence[] items = { "WiFi", "BlueTooth" }; final boolean[] checked = { false, false }; AlertDialog.Builder builder = new AlertDialog.Builder(_context); builder.setTitle(item.getTitle()); builder.setMultiChoiceItems(items, checked, new DialogInterface.OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialog, int item, boolean isChecked) { // for now just show that the user touched an option Toast.makeText(_context, items[item], Toast.LENGTH_SHORT).show(); } }); builder.setPositiveButton("Okay", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { // should I be examining what was checked here? dialog.dismiss(); } }); builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { dialog.cancel(); } }); AlertDialog alert = builder.create(); alert.show(); return true; }

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  • how to send sms programmatically in iphone 2.0

    - by MaheshBabu
    Hi folks, I need to send email programmatically in iphone os 2.0. some where i found NSString *url = [NSString stringWithString: @"mailto:[email protected][email protected]&subject=Greetings%20from%20Cupertino!&body=Wish%20you%20were%20here!"]; [[UIApplication sharedApplication] openURL: [NSURL URLWithString: url]]; is this is code work on iphone os 2.0. similarly i need to send sms in iphone 2.0 and make a call. i found it is not possible in sending sms in iphone 2.0 and making call. is there any third party tools to send sms. can any one pls help me. Thank u in advance.

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  • pass value through url

    - by shishir.bobby
    hi all, i hv a question. my url is some thing like this http://www.google.com?to=shishir&from=friend and i hv 2 textfeild from where i m getting value of to and from. i need to set those values of 2 textfeiilds into the URL to="values from textfeild" from="value from textfeild" to create a somewhat called a dynamic URL. how can i do it quick reply is always appreciated regards shishir

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  • Stock symbol auto-complete API

    - by Satish
    Hi, I am looking for some stock symbol look-up API. I could able to query yahoo finance with a symbol & could able to retrieve the stock price & other details. I am looking for some auto-complete stock look-up API like if i query fo "Go*" ... how can i get all stock symbols starting with GO* = Goog etc ... is there any APi for wildcard stock symbol searches Any help would be great .. Thanks

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  • How to change to a grouped table view in xcode without using Interface Builder

    - by Dave
    I have a table that I created within xcode so there is no nib file in this case. I want to make my table into the 'Grouped' style but im not sure how. I think it has somthing to do with the method below, the problem is Im not really sure how to call it, I do understand how methods work I'm just not too sure on where to start with this one: - (id)initWithFrame:(CGRect)frame style:(UITableViewStyle)UITableViewStyleGrouped So could someone tell me how to call it? The problem is that its not a method I wrote its a built in one so I could put that line into my header file but how would I use it in my implementation file? Thanks guys,

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