如何根据界面指南在iPad / iPhone上使控件消失 [英] How to make controls fade away on iPad/iPhone as per interface guidelines

问题描述

HIG在iPad上发表声明，考虑逐渐淡出与内置照片应用程序相似的控件。
这是如何实现的？
在我的情况下，我有一个图像占据屏幕的大部分，带有标签栏和可能的工具栏以及可能的其他控件。除图像外，我如何淡化一切。如果用户触摸屏幕，请将其恢复。

THe HIG makes a statement that on the iPad, to consider fading away controls similar to how the built in photo app does it. How is this accomplished? In my case I have an image occupying the majority of the screen with a tab bar and potentially tool bar and potentially other controls. How do I fade everything away except the image. And bring it back if the user touches the screen.

谢谢

推荐答案

<我认为你有两种选择。首先，通过核心动画，您可以在大约0.5或1秒内将alpha设置为0，另一种方法是将工具栏和导航栏设置为隐藏。如果你正在使用导航控制器，你可以调用

I think you have 2 alternatives. First, by core animation, you can set the alpha to 0 in about 0.5 or 1 second, the other way is to set the toolbar and navigation bar to hidden. If you're working with a navigation controller, you can call

[self.navigationController setToolbarHidden:YES animated:YES];

或

[self.navigationController setNavigationBarHidden:YES animated:YES];

这可能做你想做的事。

如果用户触摸屏幕，请将其恢复。

"And bring it back if the user touches the screen."

为此，您可以实施以下方法：

For this, you may implement methods like:

– touchesBegan:withEvent:
– touchesMoved:withEvent:
– touchesEnded:withEvent:
– touchesCancelled:withEvent:

如果您只处理UIViewController子类，这将有效。

this will work if you're working on a UIViewController subclass only.

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