Question

收到以下错误：

- 在弹出窗口仍然可见时到达[UIPopoverController dealloc]。

这是导致问题的代码：

-(void) showModalTime:(int)tag {

    UIViewController* popoverContent = [[UIViewController alloc] init];
    UIView *popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 200, 216)];
    popoverView.backgroundColor = [UIColor redColor];
    popoverContent.contentSizeForViewInPopover = CGSizeMake(200.0, 216.0);

    //  smaller for timePicker
    timePicker=[[UIDatePicker alloc]init];
    timePicker.frame = CGRectMake(0, 0, 200, 216);

    timePicker.backgroundColor = UIColorFromRGB(0xeedd82);
    timePicker.datePickerMode = UIDatePickerModeTime;
    [timePicker setMinuteInterval:15];
    [timePicker addTarget:self action:@selector(dateDidChange:) forControlEvents:UIControlEventValueChanged];

    [popoverView addSubview:timePicker];
    popoverContent.view = popoverView;
    popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
    popoverController.delegate = (id)self;  //  <--  this is the line that's causing the crash
    [popoverController setPopoverContentSize:CGSizeMake(200, 216) animated:NO];

    switch (tag)  {  //  displays the popover datepicker
        case 11:  //  store open time
            [timePicker setTag:11];
            [popoverController presentPopoverFromRect:tfShopOpens.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
            break;
        case 12:  //  store close time
            [timePicker setTag:12];
            [popoverController presentPopoverFromRect:tfShopCloses.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
            break;
    }

}

PopoverController被定义为实例变量：

@property（非原子，强）UIPopoverController * popoverController;

我已标记导致坠机的线路;我将所有的PopoverControllers更改为实例变量，问题现在解决了，但现在已经把它变成了丑陋的头脑。我还能做些什么来阻止这种情况？

Answer 1

检查popoverController在 showModalTime 方法中是否可见，因为popoverController覆盖

  if ([popoverController isPopoverVisible]) {
            [popoverController dismissPopoverAnimated:YES];
        }

Answer 2

你有没有合成这个属性？如果没有，您现在可能拥有popoverController和_popoverController变量......

尝试将对popoverController的所有引用更改为self.popoverController ...

self.popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
self.popoverController.delegate = (id)self;
[self.popoverController setPopoverContentSize:CGSizeMake(200, 216) animated:NO];

Answer 3

原因可能是：PopoverController无法找到委托

解决方案：确保在viewController的.h文件中声明了popover的委托，如...

@interface FooController : UIViewController <UIPopoverControllerDelegate> {
    // ...
}
// ...
@end

然后在..m文件中实现委托方法，如..

- (void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController {
    // do something now that it's been dismissed
}

更改委托的分配行，如..

[popoverController setDelegate:self];

试试这个..

这可能对你有帮助.............

为什么我仍然得到 - [UIPopoverController dealloc]到达时，popover仍然可见

3 个答案: