当我从iCloud加载视频时,我想要更新UIProgressView的进度。出于某种原因,progressHandler不会被调用。我试图像SamplePhotosApp(它载入图像)那样做,但无法使其工作。PHVideoRequestOptions'progressHandler not called
下面是我使用的选项的代码,并请求视频:
let videoRequestOptions = PHVideoRequestOptions()
videoRequestOptions.deliveryMode = .FastFormat
videoRequestOptions.version = .Original
videoRequestOptions.networkAccessAllowed = true
videoRequestOptions.progressHandler = { (progress, error, stop, info) in
dispatch_async(dispatch_get_main_queue(), {
print(progress)
self.progressView.progress = Float(progress)
})
}
PHImageManager.defaultManager().requestPlayerItemForVideo(asset, options: videoRequestOptions, resultHandler: {
result, info in
self.videoPlayer = AVPlayer(playerItem: result!)
})
此代码甚至不会打印出任何东西,所以它看起来像progressHandler块不会在所有调用。我要求的视频位于iCloud中,因为如果networkAccessAllowed设置为false,它会崩溃。
问题在哪里?