Call UIImagePickerViewController for iPad and iPhone

IPadAndIPhoneCallUIImagePickerViewControllerThe method is slightly different from the content described in this article.IPadAndIphoneFor details.

We know thatIPhoneTo obtain the Photo Library in the following ways:

 
 

  
  
UIImagePickerController *m_imagePicker = [[UIImagePickerController alloc] init];  
  
  
    if ([UIImagePickerController isSourceTypeAvailable:  
  
  
         UIImagePickerControllerSourceTypePhotoLibrary]) {  
  
  
        m_imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;  
  
  
        m_imagePicker.delegate = self;  
  
  
        //        [m_imagePicker.navigationBar.subviews];  
  
  
        [m_imagePicker setAllowsEditing:NO];  
  
  
        //m_imagePicker.allowsImageEditing = NO;  
  
  
        [self presentModalViewController:m_imagePicker animated:YES];  
  
  
        [m_imagePicker release];  
  
  
    }else {  
  
  
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:nil message:  
  
  
@"Error accessing photo library!" delegate:nil cancelButtonTitle:@"Close" otherButtonTitles:nil];  
  
  
        [alert show];  
  
  
        [alert release];  
  
  
    } 
 
 

This is no problem with iPhone operations. However, when we encounter problems in the iPad environment, the following error will be reported during running:

 
 

  
  
Terminating app due to uncaught exception 'NSInvalidArgumentException',   
  
  
reason: 'On iPad, UIImagePickerController must be presented via UIPopoverController' 
 
 

Therefore, we must use UIPopoverController. The specific implementation is as follows:

 
 

  
  
UIImagePickerController *m_imagePicker = [[UIImagePickerController alloc] init];  
  
  
    if ([UIImagePickerController isSourceTypeAvailable:  
  
  
         UIImagePickerControllerSourceTypePhotoLibrary]) {  
  
  
        m_imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;  
  
  
        m_imagePicker.delegate = self;  
  
  
        [m_imagePicker setAllowsEditing:NO];  
  
  
        UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:m_imagePicker];  
  
  
        self.popoverController = popover;  
  
  
        //popoverController.delegate = self;  
  
  
           
  
  
        [popoverController presentPopoverFromRect:CGRectMake(0, 0, 300, 300) inView:self.
  
  
 view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];  
  
  
           
  
  
        //[self presentModalViewController:m_imagePicker animated:YES];  
  
  
        [popover release];  
  
  
        [m_imagePicker release];  
  
  
    }else {  
  
  
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:nil message:@"Error accessing photo library!" 
  
  
 delegate:nil cancelButtonTitle:@"Close" otherButtonTitles:nil];  
  
  
        [alert show];  
  
  
        [alert release];  
  
  
    } 
 
 

Note that a global UIPopoverController object popoverController is assigned to the partial UIPopoverController object popopovercontroller. Instead, you cannot directly call pover. Because popover objects cannot be released when they are still visible.

Summary:IPadAndIphoneCallUIImagePickerViewControllerThe method is slightly different. I hope this article will help you!