UIPopoverController沒有運行

Question

我在iPad模擬器上工作，我想在iPad相冊中查看圖像，但是有問題：

'NSInvalidArgumentException'，原因：“在iPad上，必須通過UIPopoverController呈現UIImagePickerController”

這是我的代碼。 幫我！

- (IBAction)ShowGallery:(id)sender {
        if([UIImagePickerController isSourceTypeAvailable:
            UIImagePickerControllerSourceTypePhotoLibrary]) {
            picker = [[UIImagePickerController alloc]init];
            picker.delegate = self;
            picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
            [self presentModalViewController:picker animated:YES];
        }

Answer 1

您必須在iPad中使用PopoverController來代替PresentModalViewController，為此您可以使用以下代碼

 UIPopoverController *popOver =[[UIPopoverController alloc] initWithContentViewController:picker];
    [popOver setPopoverContentSize:CGSizeMake(315.0 , 245.0) animated:YES];

    [popOver presentPopoverFromRect:takePictureButton.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];    
[picker release];