以编程方式添加 AVPlayerViewController 后出现不满足的约束

Question

我一直在像这样以编程方式添加AVPlayerViewcontroller

     playerViewController = [[AVPlayerViewController alloc]init];
     playerViewController.view.frame = CGRectMake(40,60, 500, 700);
     playerViewController.showsPlaybackControls=YES;
     [self.view addSubview:playerViewController.view];

我收到了很多限制警告

> <NSAutoresizingMaskLayoutConstraint:0x14defa560 h=-&- v=-&- _UIBackdropContentView:0x14deae530.width == _UIBackdropView:0x14deab370.width>",
"<NSLayoutConstraint:0x14dee1b70 H:|-(14)-[UILabel:0x14dee0ea0'Hi-Speed Scrubbing']   (Names: '|':_UIBackdropContentView:0x14deae530 )>",
"<NSLayoutConstraint:0x14dee1bf0 H:[UILabel:0x14dee0ea0'Hi-Speed Scrubbing']-(14)-|   (Names: '|':_UIBackdropContentView:0x14deae530 )>",
"<NSLayoutConstraint:0x14dee1670 H:|-(0)-[_UIBackdropView:0x14deab370]   (Names: '|':UIView:0x14deab090 )>",
"<NSLayoutConstraint:0x14dee16f0 H:[_UIBackdropView:0x14deab370]-(0)-|   (Names: '|':UIView:0x14deab090 )>",
"<NSLayoutConstraint:0x14dee1330 H:|-(0)-[UIView:0x14deab090]   (Names: '|':AVAlphaUpdatingView:0x14deaaad0 )>",
"<NSLayoutConstraint:0x14dee13b0 H:[UIView:0x14deab090]-(0)-|   (Names: '|':AVAlphaUpdatingView:0x14deaaad0 )>",
"<NSLayoutConstraint:0x14defb080 'UIView-Encapsulated-Layout-Width' H:[AVAlphaUpdatingView:0x14deaaad0(0)]>"

我也尝试过给予

playerViewController.view.translatesAutoresizingMaskIntoConstraints = NO

我仍然遇到约束问题。谁能给我一个解决方案？

Answer 1

在你的 playerViewController 上使用自动布局。

Answer 2

我认为你不应该设置playerviewcontroller 的框架。你可以像这样管理它，

 NSURL *videoURL = [NSURL URLWithString:@"url string here"];
AVPlayer *player = [AVPlayer playerWithURL:videoURL];
AVPlayerViewController *playerViewController = [AVPlayerViewController new];
playerViewController.player = player;
[self presentViewController:playerViewController animated:YES completion:nil];

或者您可以将playerViewController's view 添加到self.view 而不是像这样呈现，

 [self.view addSubview:playerViewController.view];

更新：

试试这个，

 NSURL *videoURL = [NSURL URLWithString:@"url string"];
AVPlayer *player = [AVPlayer playerWithURL:videoURL];
AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];
playerLayer.frame = self.view.bounds;
[self.view.layer addSublayer:playerLayer];
[player play];

并确保如果您有其他控件，例如 label 或 button，那么您已经为此设置了适当的约束。