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POHow can I get rid of "ghost" text that appears in UITextField after clearing the field programmatically?
 

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  1. POHow can I get rid of "ghost" text that appears in UITextField after clearing the field programmatically?
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    <p>I have a strange problem with a UITextField - I am setting the value of it to @"" (or anything else still causes it) and then shrinking the field with to zero. Next time I unshrink it, it displays the same value it had before I shrunk it, regardless of my having changed the text in the view. Typing in the field causes the glitch to go away, but it looks bad.</p> <p><img src="https://i.stack.imgur.com/2fxQ5.png" alt="Image showing the problem"></p> <p>Complete code to reproduce:</p> <p>throwaway_testViewController.h:</p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @interface throwaway_testViewController : UIViewController &lt;UITextFieldDelegate&gt;{ UITextField * unitField; } @property (nonatomic, assign) IBOutlet UITextField * unitField; -(IBAction)setEditingSectionUnits; -(void)setEditingSectionValue; -(IBAction)equalsPress; @end </code></pre> <p>throwaway_testViewController.m</p> <pre><code>#import "throwaway_testViewController.h" @implementation throwaway_testViewController @synthesize unitField; #pragma mark - Inputs -(IBAction)equalsPress{ [UIView animateWithDuration:0.5 animations:^(void){ [unitField setText:@""]; [self setEditingSectionValue]; }]; } #pragma mark Input Control -(void)setEditingSectionUnits{ [UIView animateWithDuration:0.5 animations:^(void){ CGRect newRect = unitField.frame; newRect.size.width = 160; unitField.frame = newRect; }completion:^(BOOL completed){ completed ? [unitField setNeedsDisplay] : nil; }]; [unitField becomeFirstResponder]; } -(void)setEditingSectionValue{ [UIView animateWithDuration:0.5 animations:^(void){ CGRect newRect = unitField.frame; newRect.size.width = [unitField.text sizeWithFont:unitField.font constrainedToSize:CGSizeMake(80, 250)].width;; unitField.frame = newRect; }completion:^(BOOL completed){ completed ? [unitField setNeedsDisplay] : nil; }]; [unitField resignFirstResponder]; } - (BOOL)textFieldShouldReturn:(UITextField *)textField{ [self setEditingSectionValue]; return TRUE; } -(void)textFieldDidBeginEditing:(UITextField *)textField{ [self setEditingSectionUnits]; } @end </code></pre> <p>In the <code>xib</code>, place a <code>UITextField</code> tied to <code>unitField</code>, and set the delegate of the text field to be file's owner.</p> <p>Place a <code>UIButton</code> labeled <code>equalsPress</code> and tie it to that <code>IBAction</code>, and another called edit, tied to <code>setEditingSectionUnits</code>. To see the bug reproduced:</p> <ul> <li>Run the app</li> <li>Press edit</li> <li>type something into the text field (min 8-10 characters)</li> <li>press enter on the keyboard</li> <li>press equalsPress</li> <li>press edit</li> <li>Should see: cursor and empty text field</li> <li>Actually see: whatever you typed last, with a cursor at the start.</li> <li>Typing makes this text disappear.</li> </ul>
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    1. USKara
    1. USAlex Gosselin
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      1. POHow can I get rid of "ghost" text that appears in UITextField after clearing the field programmatically?
      1. USAlex Gosselin
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    2. VO
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      1. POHow can I get rid of "ghost" text that appears in UITextField after clearing the field programmatically?
      1. USDeepak Danduprolu
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    1. CORather then setting the width to 0 have you tried simply doing unitField.hidden = YES?
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      1. POHow can I get rid of "ghost" text that appears in UITextField after clearing the field programmatically?
      1. USsosborn
    2. COAs a workaround, have you tried calling `[unitField setNeedsDisplay]` after animating back to full size?
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      1. POHow can I get rid of "ghost" text that appears in UITextField after clearing the field programmatically?
      1. USpuzzle
    3. CO@sosborn unfortunately my UI requires it to shrink to zero, it gives the user experience of knowing where it went and thus how to swipe it back. @puzzle I'll try that, do you think it's something I need to call after the animation ends?
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      1. POHow can I get rid of "ghost" text that appears in UITextField after clearing the field programmatically?
      1. USAlex Gosselin
 

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