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POScroll to bottom of UITextView erratic in iOS 7
 

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    <p>The following code will work fine in iOS &lt; 7.0. In iOS 7 the scrolling will be choppy and erratic while the UITextView is updating. I'm not sure if this is a bug in iOS 7, or I am doing something wrong. </p> <p><b>TestController.h</b></p> <pre><code>//TODO: Add UITextView in storyboard and tie to textView outlet #define MAX_TEXT_VIEW_CHARACTERS 1000 @interface TestController : UIViewController { NSMutableString *_outputText; NSTimer *_outputTimer; } @property (strong, nonatomic) IBOutlet UITextView *textView; @end </code></pre> <p><b>TestController.m</b></p> <pre><code>@implementation TestController @synthesize textView; - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; _outputText = [NSMutableString stringWithCapacity:MAX_TEXT_VIEW_CHARACTERS]; _outputTimer = [NSTimer scheduledTimerWithTimeInterval:0.01 target:self selector:@selector(outputLine:) userInfo:nil repeats:YES]; } -(void)outputLine:(NSTimer *) theTimer { static int i = 0; //Run this 100 times if (i &gt; 99) { [_outputTimer invalidate]; return; } [self outputToScreen:[NSString stringWithFormat:@"Some string %d\r", ++i]]; } -(void)outputToScreen:(NSString *)str { if (!str || !str.length) return; //Nothing to output NSInteger outputTextSize = _outputText.length; [_outputText appendString:str]; if (outputTextSize &gt; MAX_TEXT_VIEW_CHARACTERS) [_outputText deleteCharactersInRange:NSMakeRange(0, outputTextSize - MAX_TEXT_VIEW_CHARACTERS)]; self.textView.text = _outputText; [self scrollOutputToBottom]; } -(void)scrollOutputToBottom { CGPoint p = [textView contentOffset]; [textView setContentOffset:p animated:NO]; [textView scrollRangeToVisible:NSMakeRange([textView.text length], 0)]; } @end </code></pre>
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    1. COFor what it’s worth, I’m having problems even with a simple `setContentOffset` call. The content offset changes, but the view doesn’t scroll. The accepted answer worked.
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    2. COGood point zoul. This is why I added both setContentOffset and scrollRageToVisible to show that neither method of scrolling works like it should with the new UITextView in iOS 7.
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