從UIImagePickerController添加一個UIImage到一個UIButton

我有一個UIButton，用戶點擊它來調出一個UIImagePickerController。處理完成後，它會將已編輯的UIImage返回給代理處理程序，然後應該使用新圖像填充UIButton。從UIImagePickerController添加一個UIImage到一個UIButton

然而，實際上，如果用戶從他們的庫中選擇一個圖像，它會正常工作。但是，如果他們使用相機拍攝照片並對其進行編輯，則圖像不會顯示到UIButton。但是，如果我爲了測試目的而將相同的圖像放入UIImageView中，它就會顯示出來。

此外，這可以在模擬器中正常工作，但不適用於設備。這是一種記憶問題嗎？這裏是我的代碼：

- (IBAction)takePictureButtonTapped 
{ 
    UIActionSheet *popupQuery = [[UIActionSheet alloc] 
           initWithTitle:nil 
           delegate:self 
           cancelButtonTitle:@"Cancel" 
           destructiveButtonTitle:nil 
           otherButtonTitles:@"Take a Photo", @"Upload from Library", nil]; 

    popupQuery.actionSheetStyle = UIActionSheetStyleBlackOpaque; 
    [popupQuery showInView:self.view]; 
    [popupQuery release]; 

} 

- (void)actionSheet:(UIActionSheet *)actionSheet 
clickedButtonAtIndex:(NSInteger)buttonIndex 
{ 
    NSLog(@"actionSheet:clickedButtonAtIndex:%d", buttonIndex); 
    if(buttonIndex == 2) 
    { 
     // cancel 
     [imagePickerController release]; 
    } 
    else 
    { 
     imagePickerController = [[[UIImagePickerController alloc] init] autorelease]; 
     imagePickerController.delegate = self; 
     imagePickerController.allowsEditing = YES; 

     if (buttonIndex == 0) 
     { 
      // Take a photo 
      // Set up the image picker controller and add it to the view 
      imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera; 
     } 
     else if (buttonIndex == 1) 
     { 
      // Upload from Library 
      imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; 

      if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary] == NO) 
       imagePickerController.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; 
     } 


     [self presentModalViewController:imagePickerController animated:YES]; 
    } 
} 

- (void)imagePickerController:(UIImagePickerController *)picker 
     didFinishPickingImage:(UIImage *)img 
        editingInfo:(NSDictionary *)editInfo 
{ 
    NSLog(@"imagePickerController::didFinishPickingImage:%@", img); 
    itemImage = img; 
    [itemImage retain]; 
    [imageButton setBackgroundImage:itemImage forState:UIControlStateNormal]; 
    [[picker parentViewController] dismissModalViewControllerAnimated:YES]; 
}

我試過setImage，setBackgroundImage，所有國家，和他們沒有工作。但是，如果我將相同的圖像放入UIImageView，那就沒有問題。

任何想法？

來源

2010-07-29 jowie

嘿......我爲這個問題贏得了「Tumbleweed」徽章...沒有人有任何想法嗎？ – jowie 2010-08-05 22:09:10

我發現它不能正常工作的原因是因爲我使用的是didFinishPickingImage:editingInfo:，這是DEPRECATED。我應該一直使用imagePickerController:didFinishPickingMediaWithInfo:。現在它工作完美！

由於某種原因，XCode沒有警告我棄用。

來源

2010-08-06 10:24:49 jowie

從UIImagePickerController添加一個UIImage到一個UIButton

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