Objective c id值=[[error userInfo]objectForKey:AverRorRecordingSuccessfullyFinisheKey]到Swift

我正试图在swift中构建一个摄像头应用程序，我在互联网上搜索了一些代码，发现了这几行代码

(void)captureOutput:(AVCaptureFileOutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL fromConnections:(NSArray *)connections error:(NSError *)error {

NSLog(@"didFinishRecordingToOutputFileAtURL - enter");

BOOL RecordedSuccessfully = YES;
if ([error code] != noErr)
{
    // A problem occurred: Find out if the recording was successful.
    id value = [[error userInfo] objectForKey:AVErrorRecordingSuccessfullyFinishedKey];
    if (value)
    {
        RecordedSuccessfully = [value boolValue];
    }
}
...

如何写入id值=[[error userInfo]objectForKey:AVErrorRecordingSuccessfullyFinishedKey]；斯威夫特

我尝试：

value = error.userInfo[AVErrorRecordingSuccessfullyFinishedKey]

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但它向我显示了这个错误：“NSString不能转换为‘DictionaryIndex’

因此，您可以用swift的方式编写这行代码：

var value: AnyObject! = error.userInfo[AVErrorRecordingSuccessfullyFinishedKey]

UPD：

根据此警告，您使用的xCode beta版本低于5：

'NSString不能转换为'DictionaryIndex'

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更新它

试一试，你觉得会是什么样子？我调整一下，等一下。