Question

我正在iOS 5上使用UIImagePickerController与我的应用程序被拒绝，因为它在他们的终端崩溃了。它不会崩溃，但我确信它与UIPopoverController有关。

请指出看起来很糟糕的事情！

显示UIImagePickerController：

- (IBAction)photoLibraryiPad {
if (popoverController) {
    if ([self.popoverController isPopoverVisible]) {
        [self.popoverController dismissPopoverAnimated:YES];
        [popoverController setDelegate:nil];
        [popoverController release];
    }
} else {
    if ([UIImagePickerController isSourceTypeAvailable:
         UIImagePickerControllerSourceTypeSavedPhotosAlbum])
    {
        UIImagePickerController *imagePicker =
        [[UIImagePickerController alloc] init];
        imagePicker.delegate = self;
        imagePicker.sourceType =
        UIImagePickerControllerSourceTypePhotoLibrary;
        imagePicker.allowsEditing = YES;

        self.popoverController = [[UIPopoverController alloc]
                                  initWithContentViewController:imagePicker];

        popoverController.delegate = self;

        [self.popoverController presentPopoverFromRect:photolibrarybutton.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

        [imagePicker release];
    }
}

}

然后这就是它们最终崩溃的地方：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

    if ([self.popoverController isPopoverVisible]) {
    [self.popoverController dismissPopoverAnimated:YES];
    [popoverController setDelegate:nil];
    [popoverController release];
}

    [noimageAvailable setHidden:YES];
    UIImage *originalImage = (UIImage *) [info objectForKey:
                                     UIImagePickerControllerEditedImage];  
    [imgPic setImage:originalImage forState:UIControlStateNormal];
    // Hide picker selector
    [picker dismissModalViewControllerAnimated: YES];
    [picker release];

}

Answer 1

两件事：

1）释放弹出窗口时，应将委托设置为nil。在致电popoverController.delegate = nil之前[popoverController release]。如果您尝试多次使用选择器，它可能会崩溃。委托正在调用一个不再存在的对象。

2）检查弹出窗口是否可见时，检查以确保它是否存在。

UIPopoverController在运行iOS 5.0.1的iPad上崩溃了吗？

1 个答案: