如何访问 iOS 上的视频输出功能？
连接视频连接器后，Netflix 等应用程序能够从扩展坞连接器播放视频。应用程序是否能够将任意数据输出到视频上？或者视频播放器是 iOS 上唯一可以执行此操作的组件？如果前者可能，我的应用程序如何访问视频输出？
Applications such as Netflix have the ability to play video out of the dock connector when the video connector is hooked up. Do applications have the ability to put arbitrary data on video out? Or is the video player the only component on iOS that can do so? If the former is possible, how can my app access video output?
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要绘制到视频输出，请在
[[UIScreen Screens] objectAtIndex:1];返回的屏幕上放置一个窗口。在已创建的窗口上调用window.screen = theScreen将其分配给屏幕“theScreen”。To draw to video out, place a window on the screen returned by
[[UIScreen screens] objectAtIndex:1];. Callwindow.screen = theScreenon a window you have already created to assign it to the screen "theScreen".