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  • Draw rectangle using Core Graphics with live preview

    - by mikawber
    I'm creating a simple drawing application and would like some help with drawing rectangles based on the user's touch events. I'm able to draw a rectangle using Core Graphics from the point in touchesBegan to the point in touchesEnded. This rectangle is then displayed once the touchesEnded event is fired. However, I would like to be able to do this in a 'live' fashion. Meaning, the rectangle is updated as the user drags their finger. Is this possible? Any help would be greatly appreciated, thank you!

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  • iPad application UITableView delegate methods are not getting called

    - by jAmi
    Hi, I am using the same technique as i populate my UITableView in iphone while writing my iPad application. Tab Bar Controller UINavigationControllerUITableViewController of type myCustomTable(load From NIB) MyCustomTableViewController NIB and class file implements the delegate methods @interface MyCustomTableViewController : UITableViewController <UITableViewDelegate, UITableViewDataSource> { NSMutableArray *PDFList; IBOutlet UITableView *PDFTable; } but my delegate methods are not getting called. What do i do?

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  • iPhone Encryption Standard - Will this implementation bye-pass apple check?

    - by Futur
    Hi All, I found this implementation, and i am not sure whether we can use this implementation and apple will bye-pass extra check, this is a base-64 implementation. The source code link is http://blog.objectgraph.com/wp-content/uploads/2010/04/CryptTest.zip The web page link is : http://blog.objectgraph.com/index.php/2010/04/20/encrypting-decrypting-base64-encode-decode-in-iphone-objective-c/ Kindly advice me friends.

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  • Cycle backwards through NSArray

    - by dot
    Hello! I'm trying to cycle backwards through an array by clicking a button. My current code is close, but doesn't quite work. - (void)viewDidLoad { self.imageNames = [NSArray arrayWithObjects:@"MyFirstImage", @"AnotherImage", nil]; currentImageIndex = 0; [super viewDidLoad]; } ...what works: - (IBAction)change { UIImage* imageToShow = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:[imageNames objectAtIndex:currentImageIndex] ofType:@"png"]; currentImageIndex++; if (currentImageIndex >= imageNames.count) { currentImageIndex = 0; } } ...and what isn't working: - (IBAction)changeBack { UIImage* imageToShow = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:[imageNames objectAtIndex:currentImageIndex] ofType:@"png"]; currentImageIndex--; if (currentImageIndex >= imageNames.count) { currentImageIndex = 0; } } Any help is gladly appreciated! Thanks!

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  • Error with zoomStartTime and AnnotatedTimeLine

    - by user973025
    I'm a bit of a beginner with Javascript, but last month I had a working Google chart linked to a Google Docs file, which uses a start date for the graph at 90 days before the current date. I checked the page today and in Chrome I get the message "Object # has no method 'getTime'", and in Firefox I get the message "b.zoomStartTime[y] is not a function". Both stop the graph from loading. I have simplified the code to help me with the error, but I'm not getting anywhere... Here's the code: <script type="text/javascript"> var oldDate = new Date(); oldDate.setDate(oldDate.getDate() - 90); </script> <script type="text/javascript" src="//ajax.googleapis.com/ajax/static/modules/gviz/1.0/chart.js"> { "dataSourceUrl": "//docs.google.com/spreadsheet/tq?key=0AkQH6d2CUv_qdDhwd3gtZzdTVFlNX3AwX2xUSUVuclE&transpose=0&headers=-1&range=A1%3AB2436&gid=0&pub=1", "options": { "zoomStartTime": oldDate, "width": 650, "height": 371 }, "chartType": "AnnotatedTimeLine", } </script> Any ideas would be hugely appreciated. David.

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  • iPhone/Obj-C - Archiving object causes lag

    - by Dylan
    Hi I have a table view, and when I delete a cell I am removing an item from an NSMutableArray, archiving that array, and removing the cell. However, when I do this, it is causing the delete button to lag after I click it. Is there any way to fix this? // Override to support editing the table view. - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { int row = [indexPath row]; [savedGames removeObjectAtIndex:row]; [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; //this line causing lag [NSKeyedArchiver archiveRootObject:savedGames toFile:[self dataFilePath]]; } } Thanks

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  • How can we add scrolling text in cocos2d by using UITextView ?

    - by srikanth rongali
    I want a UITextView in cocos2d. I used in init method I wrote the code, UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(0,0, windowSize.height/2,windowSize.width/2)]; textView.backgroundColor = [UIColor clearColor]; textView.text = @"I am First enemy"; [textView setEditable:NO]; [[[CCDirector sharedDirector]openGLView]addSubview:textView]; the orientation is [[CCDirector sharedDirector] setDeviceOrientation:CCDeviceOrientationLandscapeLeft]; I need the text to appear in landscape mode, but I am getting the text in following way. How can I make the text to appear in the landScape mode. I am working in cocos2d. CanOI scroll the text ? What should i add to make the text scroll up and down. Thank you.

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  • Picker in UINavigationController

    - by william-hu
    Hi , i use a UIPickerView in my root view of UINavigationController . And i used one button, when i pressed it, pass the data(shows in picker) to the next level view of navigation controller. How should i do this? Thank you!

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  • callback in android?

    - by androidbase Praveen
    in android application development, i frequently go through the word "CALLBACK" in many places. i want to know want it means to tell us technically. and how i can manage the callback of the applications. i would need a guidance to understand about it....

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  • How to set an alarm to fire properly at fixed time?

    - by Pentium10
    I have this code Calendar c = new GregorianCalendar(); c.add(Calendar.DAY_OF_YEAR, 1); c.set(Calendar.HOUR_OF_DAY, 23); c.set(Calendar.MINUTE, 22); c.set(Calendar.SECOND, 0); c.set(Calendar.MILLISECOND, 0); // We want the alarm to go off 30 seconds from now. long firstTime = SystemClock.elapsedRealtime(); firstTime += 30*1000; long a=c.getTimeInMillis(); // Schedule the alarm! AlarmManager am = (AlarmManager)ctx.getSystemService(Context.ALARM_SERVICE); am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, c.getTimeInMillis(), 1*60*60*1000, sender); It is not executed at 23:22h What I am doing wrong? I noticed firstTime and c.getTimeInMillis() differs a lot in size and length. When I use firstTime, so when set to 30 seconds, the alarm is executed well.

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  • How can we detect a touch of a sprite?

    - by srikanth rongali
    I have two sprites in my app. Both should have touches enabled and both touches are independent of one another. And if I touch the screen (not on sprites) it should have different touches. My problem is all three sprite1, sprite2, remaining screen should have independent touches. But my program is taking all the touches as same. How can I make them as what I needed ? Thank You.

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  • Should I use interface builder or not?

    - by Michael Waterfall
    I'd like to know more about the pros and cons of using interface builder when developing iPhone/iPad apps. I've written a fairly complex and customized app that's on the app store right now, but all of the interfaces are hand coded as they are fairly complex. I've customised the navigation and tab bars with backgrounds, table view cells are manually drawn for speed, and some views are complex and scalable with many subviews. I'm pondering whether or not to start using interface builder but I'm not sure to what extent I'll use it and whether it's worth it at all. Is it quicker? Can things still be easily customised? Any advice would be most welcome!

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  • How to detect if Safari is disabled on iPhone

    - by zorro2b
    How can you detect whether Safari has been disabled by parental controls on the iPhone? I know it is possible because the App X3Watch refuses to work until Safari is disabled. As far as I can see there is no api for the parental controls, so what technique can be used for this?

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  • having trouble with zooming in android webview

    - by Talha
    I'm new to android. I'm using webview in scrollview to display my local html page (html has text only). I created two buttons for zoomin and zoomout using behind function zoomIn() & zoomOut() respectively. These functions work fine. The problenm is, when I zoom in, some of the text goes out from both top and bottom and it doesn't appear when I scroll. How can I resolve this?

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  • XCode - Multiple targets, Multiple *internationalized* names?

    - by Kris Jenkins
    I've got an internationalized iPhone project. In the various ${lang}.lproj/InfoPlist.strings files I've got a single key, CFBundleName = "My App Name". That's working fine for a single target, but I can't make it work for multiple targets. I'd like to have several translated InfoPlistMyApp.strings files for the main target, plus several InfoPlistMyApp*Lite*.strings files for the lite version. But I can't figure out how to set it up. The InfoPlist.strings name seems to be set in stone, so I can't replace it dynamically. Any ideas?

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  • drag object vertically

    - by blacksheep
    i like to drag this object vertically instead of horizontally, which is doin it now: (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event allTouches] anyObject]; CGPoint location = [touch locationInView:touch.view]; if (CGRectContainsPoint(myObject.frame, location)){ CGPoint xLocation = CGPointMake(location.x, myObject.center.y); myObject.center = xLocation; } }

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  • Is it possible to dither a gradient drawable?

    - by Seu
    I'm using the following drawable: <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" > <gradient android:startColor="@color/content_background_gradient_start" android:endColor="@color/content_background_gradient_end" android:angle="270" /> </shape> The problem is that I get severe banding on hdpi devices (like the Nexus One and Droid) since the gradient goes from the top of the screen to the very bottom. According to http://idunnolol.com/android/drawables.html#shape_gradient there isn't a "dither" attribute for a gradient. Is there anything I can do to smooth the gradient?

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