标签: mobilecoreservices

我收到错误消息 - 使用未声明的标识符'kUTTypeMovie'

在下面的代码中 -

-(IBAction)selectVideo:(id)sender {
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
    imagePicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    imagePicker.mediaTypes = [[NSArray alloc] initWithObjects:(NSString *)kUTTypeMovie, nil];

    imagePicker.delegate = self;
    [self presentModalViewController:imagePicker animated:YES];
}

它出什么问题了？

我从apple的文档中复制了一些代码- 我得到了这两个错误:

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)

我究竟做错了什么？

编辑:代码:

- (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 …

我正在尝试使用以下代码从PhotoLibrary中选择视频

imageController.mediaTypes = [kUTTypeMovie: NSString]

选择视频后,当它正在压缩时,我正在摆脱边界问题.

我在网上搜索,发现以下行.我无法将其转换为Swift版本(链接) imageController.mediaTypes = [[NSArray alloc] initWithObjects:(NSString *)kUTTypeMovie, nil]

请告知我们上面的Swift版本.如果任何人都可以提供Swift版本,这非常有用.

问题2:

我想在应用中显示所选视频,并且需要在点按时播放.我们可以在没有外部插件和使用内置库的情况下完成吗？

有没有办法将所有不同的UTType 扩展类型获取为字符串？我专门需要它们来处理图像、音频和视频。

我遵循了这个答案，但它没有给我所有的扩展

var types = [String]()

let utiTypes = [kUTTypeImage, kUTTypeMovie, kUTTypeVideo, kUTTypeMP3, kUTTypeAudio, kUTTypeQuickTimeMovie, kUTTypeMPEG, kUTTypeMPEG2Video, kUTTypeMPEG2TransportStream, kUTTypeMPEG4, kUTTypeMPEG4Audio, kUTTypeAppleProtectedMPEG4Audio, kUTTypeAppleProtectedMPEG4Video, kUTTypeAVIMovie, kUTTypeAudioInterchangeFileFormat, kUTTypeWaveformAudio, kUTTypeMIDIAudio, kUTTypeLivePhoto, kUTTypeTIFF, kUTTypeGIF, kUTTypeQuickTimeImage, kUTTypeAppleICNS]

for type in utiTypes {
            
    let str = String(type)
            
    guard let utiStr = fileExtension(for: str) else { continue }

    types.appent(utiStr)
}

dump(types)

结果是

15 elements // there are really 21 types
  - "jpeg"
  - "png"
  - "mov"
  - "mpg"
  - "m2v"
  - "ts" …

在我的应用程序中,我想在视频模式下打开相机.所以我写下面的代码

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
    [window addSubview:viewController.view];
    [window makeKeyAndVisible];

    UIImagePickerController *ipc;
    ipc = [[UIImagePickerController alloc] init];
    ipc.sourceType = UIImagePickerControllerSourceTypeCamera;
    ipc.mediaTypes = [NSArray arrayWithObject:(NSString *) kUTTypeMovie];

    [viewController presentModalViewController:ipc animated:YES];

    return YES;
}

此代码适用于iPhone 3.1.3,但在iOS4上不起作用.我可以在iOS4上使用UIImagePickerController作为视频吗？