ios - ModalViewController 半透明背景

Question

我使用那段代码将 UIViewController 显示为具有半透明背景的模态(在 IOS7 及更低版本上工作)。

MyViewController *myViewController = [[MyViewController alloc] init];
navController.modalPresentationStyle = UIModalPresentationCurrentContext;
[navController presentViewController:myViewController animated:NO completion:nil];

现在用 IOS8 编译显示黑色背景的模态。

有解决办法吗？ (没有制作动画 subview )谢谢。

Answer 1

在 iOS 8 及更高版本中，您可以为此目的使用“UIModalPresentationOverCurrentContext”。来自 UIViewController 文档:

UIModalPresentationOverCurrentContext

A presentation style where the content is displayed over only the parent view controller’s content. The views beneath the presented content are not removed from the view hierarchy when the presentation finishes. So if the presented view controller does not fill the screen with opaque content, the underlying content shows through.

When presenting a view controller in a popover, this presentation style is supported only if the transition style is UIModalTransitionStyleCoverVertical. Attempting to use a different transition style triggers an exception. However, you may use other transition styles (except the partial curl transition) if the parent view controller is not in a popover.

Available in iOS 8.0 and later.

我不知道在 iOS 8 之前支持透视模态呈现的 View Controller (并将研究它以供我自己使用)，但上述选项在我的新操作系统测试中绝对有效。

注意:一定要给你呈现的 View Controller 一个 clearColor 的 backgroundColor。