UIPopover 从 UIButton 崩溃
我正在从 UIButton 呈现 UIPopover，但我的应用程序在行 [popoverControllerpresentPopoverFromRect:[buttonbounds] inView:button allowedArrowDirections:UIPopoverArrowDirectionRightanimated:NO]; 处崩溃
- (IBAction)birthdayButtonClicked:(id)sender
{
UIViewController* popoverContent = [[UIViewController alloc] init];
UIView* popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 344)];
popoverView.backgroundColor = [UIColor whiteColor];
UIDatePicker *datePicker = [[UIDatePicker alloc]init];
datePicker.frame = CGRectMake(0, 44, 320, 300);
[popoverView addSubview:self.view];
[popoverView addSubview:datePicker];
popoverContent.view = popoverView;
popoverContent.contentSizeForViewInPopover = CGSizeMake(320, 244);
UIPopoverController *popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
UIButton *button = (UIButton *)sender;
[popoverController presentPopoverFromRect:[button bounds] inView:button permittedArrowDirections:UIPopoverArrowDirectionRight animated:NO];
[popoverView release];
[popoverContent release];
}
I'm presenting a UIPopover from a UIButton but my app is crashing at line [popoverController presentPopoverFromRect:[button bounds] inView:button permittedArrowDirections:UIPopoverArrowDirectionRight animated:NO];
- (IBAction)birthdayButtonClicked:(id)sender
{
UIViewController* popoverContent = [[UIViewController alloc] init];
UIView* popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 344)];
popoverView.backgroundColor = [UIColor whiteColor];
UIDatePicker *datePicker = [[UIDatePicker alloc]init];
datePicker.frame = CGRectMake(0, 44, 320, 300);
[popoverView addSubview:self.view];
[popoverView addSubview:datePicker];
popoverContent.view = popoverView;
popoverContent.contentSizeForViewInPopover = CGSizeMake(320, 244);
UIPopoverController *popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
UIButton *button = (UIButton *)sender;
[popoverController presentPopoverFromRect:[button bounds] inView:button permittedArrowDirections:UIPopoverArrowDirectionRight animated:NO];
[popoverView release];
[popoverContent release];
}
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添加 self.view 作为子视图不是一个好主意。 UIView 对象在每个当前时刻只能显示一次，不能在 self.view 中显示内容为 self.view 的弹出窗口。如果您确实需要执行此任务，请尝试复制所需的视图。
It is not a good idea to add self.view as subview. UIView object can be displayed only once in every current mooment, you cannot show popover with content as self.view in self.view. If you really need to perform this task then try to make copy of required views.
将 inView 更改为 self.view。 inView 表示您要在哪个 UIView 中呈现弹出框。
Change the inView to self.view. inView means in which UIView you want to present popover.