iOS6 UIPickerView内存泄漏问题。

时间:2012-10-24 08:27:01

标签: iphone objective-c memory-leaks xcode4.5 uipickerview

我得到了这个内存泄漏:

[UIPickerTableViewTitleCell initWithStyle:resuableIdentifier]; 

NSConcentrateMutableAttributedString.

问题是我没有实现这个委托。实现这一点后,内存泄漏就消失了。可能这些信息对其他人有用,因为我只花了16个小时来解决这个问题。

// Do something with the selected row.
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {

// Get the text of the row.
NSString *rowItem = [NSString stringWithFormat:@"     %@",[machineData objectAtIndex:row]];

// Create and init a new UILabel.
// We must set our label's width equal to our picker's width.
// We'll give the default height in each row.
UILabel *lblRow = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, 0.0f, [pickerView bounds].size.width, 44.0f)];

// Make the text color red.
[lblRow setTextColor: [UIColor blackColor]];
[lblRow setFont:[UIFont boldSystemFontOfSize:20]];

// Center the text.
[lblRow setTextAlignment:UITextAlignmentLeft];

// Add the text.
[lblRow setText:rowItem];

// Clear the background color to avoid problems with the display.
[lblRow setBackgroundColor:[UIColor clearColor]];

// Return the label.
return lblRow;
}

2 个答案:

答案 0 :(得分:0)

感谢您的信息。对此漏洞感到困惑。只有少数评论:

  • 可能应该自动释放lblRow:return [lblRow autorelease];

  • [pickerView rowSizeForComponent:component]可用于获取新标签的大小。

答案 1 :(得分:0)

我在弹出窗口中使用了IUIPicker,每次我解开popover时都会出现内存泄漏。我也在使用ARC,所以我解决这个问题的最简单方法是在卸载时设置UIPickerView = nil。以下似乎已经成功了。

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
    self.pickerView = nil;
}