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POReusing view in UIPickerView with iOS 7
 

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  1. POReusing view in UIPickerView with iOS 7
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    <p><strong>EDIT 12-14-2015</strong> : This problem is again frequently reported on iOS 7, iOS 8, iOS 9.... I think Apple want not of this control anymore, and should just forbid us to use it instead of let such a major bug</p> <p>I use a UIPickerView with custom views loaded from a Xib. I was using the method </p> <pre><code>-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view </code></pre> <p>from UIPickerViewDelegate to reuse my views. </p> <p>With iOS 6, my UIPickerview works perfectly and my views are reused. </p> <p>Since iOS 7, the reusingView is always nil, so I need to load the NIB for each row (I have 250 rows). My views are doing some treatments so it can take a little part of memory but x250 = big memory leak.</p> <p>To be sure of what the problem is, I did a simple project with a UILabel :</p> <pre><code>-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view { UILabel *label = (UILabel *)view; if(view == nil) { label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, pickerView.frame.size.width, 76)]; } else { NSLog(@"*******************************************************"); } NSLog(@"Current inndex : %i",row); label.text = [NSString stringWithFormat:@"TITRE %i", row]; return label; } </code></pre> <p>With iOS 6, my views are correctly reused : </p> <blockquote> <p>2013-12-17 14:27:25.395 EssaiReusedViewPicker[261:907] Current inndex : 220 2013-12-17 14:27:25.396 EssaiReusedViewPicker[261:907] ******************************************************* 2013-12-17 14:27:25.397 EssaiReusedViewPicker[261:907] Current inndex : 221 2013-12-17 14:27:25.404 EssaiReusedViewPicker[261:907] ******************************************************* 2013-12-17 14:27:25.407 EssaiReusedViewPicker[261:907] Current inndex : 222 2013-12-17 14:27:25.409 EssaiReusedViewPicker[261:907] ******************************************************* 2013-12-17 14:27:25.410 EssaiReusedViewPicker[261:907] Current inndex : 223 2013-12-17 14:27:25.411 EssaiReusedViewPicker[261:907] ******************************************************* 2013-12-17 14:27:25.412 EssaiReusedViewPicker[261:907] Current inndex : 224 2013-12-17 14:27:25.414 EssaiReusedViewPicker[261:907] ******************************************************* 2013-12-17 14:27:25.415 EssaiReusedViewPicker[261:907] Current inndex : 225 2013-12-17 14:27:25.420 EssaiReusedViewPicker[261:907] ******************************************************* 2013-12-17 14:27:25.424 EssaiReusedViewPicker[261:907] Current inndex : 227 2013-12-17 14:27:25.425 EssaiReusedViewPicker[261:907]</p> </blockquote> <p>But with iOS 7, it's an all-new story... : </p> <pre><code>2013-12-17 14:36:09.555 EssaiReusedViewPicker[7209:70b] Current inndex : 0 2013-12-17 14:36:09.557 EssaiReusedViewPicker[7209:70b] Current inndex : 1 2013-12-17 14:36:09.557 EssaiReusedViewPicker[7209:70b] Current inndex : 2 2013-12-17 14:36:09.560 EssaiReusedViewPicker[7209:70b] Current inndex : 0 2013-12-17 14:36:09.560 EssaiReusedViewPicker[7209:70b] Current inndex : 1 2013-12-17 14:36:09.561 EssaiReusedViewPicker[7209:70b] Current inndex : 2 2013-12-17 14:36:09.563 EssaiReusedViewPicker[7209:70b] Current inndex : 0 2013-12-17 14:36:09.563 EssaiReusedViewPicker[7209:70b] Current inndex : 1 2013-12-17 14:36:09.564 EssaiReusedViewPicker[7209:70b] Current inndex : 2 2013-12-17 14:36:09.566 EssaiReusedViewPicker[7209:70b] Current inndex : 0 2013-12-17 14:36:09.567 EssaiReusedViewPicker[7209:70b] Current inndex : 1 2013-12-17 14:36:09.567 EssaiReusedViewPicker[7209:70b] Current inndex : 2 2013-12-17 14:36:09.568 EssaiReusedViewPicker[7209:70b] Current inndex : 1 2013-12-17 14:36:09.568 EssaiReusedViewPicker[7209:70b] Current inndex : 2 2013-12-17 14:36:09.569 EssaiReusedViewPicker[7209:70b] Current inndex : 0 2013-12-17 14:36:09.569 EssaiReusedViewPicker[7209:70b] Current inndex : 1 2013-12-17 14:36:14.172 EssaiReusedViewPicker[7209:70b] Current inndex : 3 2013-12-17 14:36:14.350 EssaiReusedViewPicker[7209:70b] Current inndex : 3 2013-12-17 14:36:14.351 EssaiReusedViewPicker[7209:70b] Current inndex : 2 2013-12-17 14:36:14.367 EssaiReusedViewPicker[7209:70b] Current inndex : 4 2013-12-17 14:36:14.667 EssaiReusedViewPicker[7209:70b] Current inndex : 4 2013-12-17 14:36:14.668 EssaiReusedViewPicker[7209:70b] Current inndex : 3 2013-12-17 14:36:14.700 EssaiReusedViewPicker[7209:70b] Current inndex : 5 2013-12-17 14:36:15.067 EssaiReusedViewPicker[7209:70b] Current inndex : 5 2013-12-17 14:36:15.067 EssaiReusedViewPicker[7209:70b] Current inndex : 4 2013-12-17 14:36:15.083 EssaiReusedViewPicker[7209:70b] Current inndex : 6 2013-12-17 14:36:15.367 EssaiReusedViewPicker[7209:70b] Current inndex : 6 2013-12-17 14:36:15.367 EssaiReusedViewPicker[7209:70b] Current inndex : 5 2013-12-17 14:36:15.400 EssaiReusedViewPicker[7209:70b] Current inndex : 7 2013-12-17 14:36:16.416 EssaiReusedViewPicker[7209:70b] Current inndex : 7 </code></pre> <p>So what's wrong? iOS or ...?</p>
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    1. USQLag
    1. USQLag
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    1. CO"(I have 250 rows)", are you using a `UITableViewCell` with a `UIPickerview` subview?
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      1. POReusing view in UIPickerView with iOS 7
      1. USLaszlo
    2. CONo, a simple UIView. It shouldn't be a problem because it's possible to use the reused views with a UILabel. Even with a UILabel, it's not working
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      1. POReusing view in UIPickerView with iOS 7
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    3. COIf you have rows, why don't you use `UITableView` with custom cells?
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      1. POReusing view in UIPickerView with iOS 7
      1. USLaszlo
 

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