我正在将应用程序移植到iOS 8.我有一些代码可以播放之前正在运行的视频,但现在却没有.
当我运行它时,我收到以下错误:
( "<NSLayoutConstraint:0x7faba2df5940 H:|-(34)-[MPKnockoutButton:0x7faba2e6d750](LTR) (Names: '|':_UIBackdropContentView:0x7faba2dc38c0 )>","<NSLayoutConstraint:0x7faba2d51780 H:[MPKnockoutButton:0x7faba2e6d750]-(34)-[MPDetailSlider:0x7faba2dc6440](LTR)>","<NSLayoutConstraint:0x7faba2d5b7f0 H:[MPDetailSlider:0x7faba2dc6440]-(34)-[UIView:0x7faba2dc4060](LTR)>","<NSLayoutConstraint:0x7faba2dc5da0 UIView:0x7faba2dc4060.right == _UIBackdropView:0x7faba2dbfdc0.right>","<NSLayoutConstraint:0x7faba2dc58d0 H:|-(0)-[_UIBackdropView:0x7faba2dbfdc0] (Names: '|':MPVideoPlaybackOverlayView:0x7faba2dbf6a0 )>","<NSLayoutConstraint:0x7faba2dc5950 H:[_UIBackdropView:0x7faba2dbfdc0]-(0)-| (Names: '|':MPVideoPlaybackOverlayView:0x7faba2dbf6a0 )>","<NSLayoutConstraint:0x7faba2df9b10 H:[MPVideoPlaybackOverlayView:0x7faba2dbf6a0(0)]>","<NSAutoresizingMaskLayoutConstraint:0x7faba2dfbfa0 h=-&- v=-&- _UIBackdropContentView:0x7faba2dc38c0.midX == _UIBackdropView:0x7faba2dbfdc0.midX>","<NSAutoresizingMaskLayoutConstraint:0x7faba2dfbff0 h=-&- v=-&- _UIBackdropContentView:0x7faba2dc38c0.width == _UIBackdropView:0x7faba2dbfdc0.width>" )
这是代码:
movieController = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:playlistUrl]]; movieController.movieSourceType = MPMovieSourceTypeStreaming; [movieController.view setFrame:[self.playerView bounds]]; [self.playerView addSubview:movieController.view]; [movieController play];
有什么想法吗?
解决方法
这似乎在iOS 8.1中得到修复.升级后错误消失了.
但是,我确实需要稍微修改我的代码:
movieController = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:playlistUrl]]; movieController.movieSourceType = MPMovieSourceTypeStreaming; [movieController.view setTranslatesAutoresizingMaskIntoConstraints:NO]; [playerView addSubview:movieController.view]; id views = @{ @"player": movieController.view }; [playerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[player]|" options:0 metrics:nil views:views]]; [playerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[player]|" options:0 metrics:nil views:views]]; [movieController play];
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