找不到符號：kUTTypeImage

我複製了一些代碼位來自apple's documentation - 和我這2個錯誤：找不到符號：kUTTypeImage

Undefined symbols for architecture i386: 
    "_kUTTypeImage", referenced from: 
     -[ImagePicker imagePickerController:didFinishPickingMediaWithInfo:] in ImagePicker.o 
ld: symbol(s) not found for architecture i386 
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我在做什麼錯？

編輯：代碼：

- (IBAction) showSavedMediaBrowser { 
    [self startMediaBrowserFromViewController: self 
           usingDelegate: (id)self]; 
} 

- (BOOL) startMediaBrowserFromViewController: (UIViewController*) controller 
           usingDelegate: (id <UIImagePickerControllerDelegate, 
               UINavigationControllerDelegate>) delegate { 

    if (([UIImagePickerController isSourceTypeAvailable: 
      UIImagePickerControllerSourceTypeSavedPhotosAlbum] == NO) 
     || (delegate == nil) 
     || (controller == nil)) 
     return NO; 

    UIImagePickerController *mediaUI = [[UIImagePickerController alloc] init]; 
    mediaUI.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; 

    // Displays saved pictures and movies, if both are available, from the 
    // Camera Roll album. 
    mediaUI.mediaTypes = 
    [UIImagePickerController availableMediaTypesForSourceType: 
    UIImagePickerControllerSourceTypeSavedPhotosAlbum]; 

    // Hides the controls for moving & scaling pictures, or for 
    // trimming movies. To instead show the controls, use YES. 
    mediaUI.allowsEditing = YES; 

    mediaUI.delegate = delegate; 

    [controller presentViewController:mediaUI animated:YES completion:nil]; 
    return YES; 
} 

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

    NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType]; 
    UIImage *originalImage, *editedImage, *imageToUse; 

    // Handle a still image picked from a photo album 
    if (CFStringCompare ((__bridge_retained CFStringRef) mediaType, kUTTypeImage, 0) 
     == kCFCompareEqualTo) { 

     editedImage = (UIImage *) [info objectForKey: 
            UIImagePickerControllerEditedImage]; 
     originalImage = (UIImage *) [info objectForKey: 
            UIImagePickerControllerOriginalImage]; 

     if (editedImage) { 
      imageToUse = editedImage; 
     } else { 
      imageToUse = originalImage; 
     } 
     // Do something with imageToUse 
    } 

    [[picker parentViewController] dismissModalViewControllerAnimated: YES]; 
}

我認爲錯誤是最後的方法開始的地方，但我不知道。

您的文章沒有太多的上下文來解釋代碼段;請更清楚地解釋你的情況。

來源

2012-04-13 Lior Pollak

什麼是你的代碼？ – blake305 2012-04-13 16:49:23

我引用了他們的網站。我會更新這個問題。 – 2012-04-13 16:52:02

181

查找符號（kUTTypeImage）並找到它應該存在的圖像/庫（本例中爲MobileCoreServices.framework）。然後將您的二進制文件與該框架鏈接

來源

2012-04-13 16:51:21 justin

+61

另外不要忘記導入頭 – GreyHands 2012-04-13 16:55:11

工作！顯然我鏈接了CoreFoundation而不是MobileCoreServices。 – 2012-04-13 16:59:35

每次都有我。 – Dex 2012-10-07 07:41:56

強制性斯威夫特答案：

import MobileCoreServices

來源

2016-07-24 22:49:05 CodeBender

找不到符號：kUTTypeImage

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