UIPopoverController沒有運行

Question

我的iPad模擬器工作，我想在iPad的照片庫查看圖像，但它是有問題的：

「NSInvalidArgumentException」的，理由是：

「在iPad上，的UIImagePickerController必須通過UIPopoverController呈現」

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

相反PresentModalViewController，你必須使用一個iPad.You可以PopoverController使用下面的代碼爲

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];