如何在iOS8共享扩展中获取视频属性

时间:2014-09-05 15:24:10

标签: ios video share ios8 ios-app-extension

我正在尝试使用新的iOS 8应用扩展程序创建共享扩展程序以分享视频。我想打开照片应用并通过扩展程序分享视频。

我通过以下代码获取视频网址:

NSExtensionItem *inputItem = self.extensionContext.inputItems.firstObject;
    NSItemProvider *provider = inputItem.attachments[0];

    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0), ^{

        if ([provider hasItemConformingToTypeIdentifier:(NSString *)kUTTypeQuickTimeMovie])
        {
            [provider loadItemForTypeIdentifier:@"com.apple.quicktime-movie" options:nil completionHandler:^(NSURL *path,NSError *error){
                if (path)
                {
                    dispatch_async(dispatch_get_main_queue(), ^{
                        _moviePath = path;
                    });
                }
            }];
        }
    });

但我只收到了视频文件网址:

file:///var/mobile/Media/DCIM/100APPLE/IMG_0062.MOV

我还希望获得更多视频属性,例如:大小和持续时间

我使用了以下代码,但没有工作:

NSDictionary *opts = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:NO]                                                   forKey:AVURLAssetPreferPreciseDurationAndTimingKey];
 AVURLAsset *urlAsset = [AVURLAsset URLAssetWithURL:_moviePath options:opts];  
int second = urlAsset.duration.value / urlAsset.duration.timescale; 

和这段代码:

AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:_moviePath];
CMTime duration = playerItem.duration;
float seconds = CMTimeGetSeconds(duration);
NSLog(@"duration: %.2f", seconds);

他们都不工作

和xcode提示:

Error [IRForTarget]: Call to a symbol-only function 'memset' that is not present in the target
error: 0 errors parsing expression
error: The expression could not be prepared to run in the target

您可以帮助我获取视频属性吗?非常感谢!

1 个答案:

答案 0 :(得分:0)

现在,以下代码可以正常运行:

NSDictionary *opts = [NSDictionary 
    dictionaryWithObject:[NSNumber numberWithBool:NO]
    forKey:AVURLAssetPreferPreciseDurationAndTimingKey];

AVURLAsset *urlAsset = [AVURLAsset URLAssetWithURL:_moviePath options:opts];  
int second = urlAsset.duration.value / urlAsset.duration.timescale; 

我不知道为什么以前不起作用!