presentViewController黑色背景而不是透明 [英] presentViewController black background instead of transparent

问题描述

我认为我希望以标准方式呈现给用户（从屏幕底部向上滑动）。大约一半的视图是透明背景，下半部分有一些输入字段（想象键盘弹出的方式）。当我在rootViewController上调用 [self presentViewController] 时，它会向上滑动视图，但是大约半秒之后，视图过去是透明的，它将被替换为黑色代替。这与presentViewController和presentModalViewController都会发生。如何改变这种行为？

I have a view that I wish to present to the user in the standard way (sliding up from the bottom of the screen). About half this view is a transparent background and the bottom half has some input fields (imagine the way the keyboard pops up). When I call [self presentViewController] on the rootViewController, it slides the view up, but then about half a second later, where the view used to be transparent it is replaced with black instead. This happens with both presentViewController and presentModalViewController. How to change this behaviour?

推荐答案

最后，它看起来不可能是透明的，我是通过将此视图添加为根视图控制器边界之外的子视图，然后使用动画块将其滑动到位来解决此问题。不是很多额外的代码，但能够使用标准的iOS行为来做它会很不错。

In the end, it looks like it's not possible for it to be transparent, I've got around this by adding this view as a subview outside of the bounds of the root view controller, and then slid it into place using an animation block. Not a lot of extra code, but it would have been nice to be able to use standard iOS behaviour to do it.

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