在视野中淡入淡出UIButton [英] Fading in and out UIButton in view

问题描述

在我的iPad应用程序中，我需要显示封面 - 出版物的图像。用户可以点击封面以获取详细信息。

In my iPad app I need to display cover-Images of publications. The user can tap on a cover to get details.

我考虑将UIButtons渲染为自定义按钮，封面图像为背景图像。是否有可能将UIButton淡入淡出？用户可以选择要显示的出版物类别，并且他更改了我希望淡化一些出版物的类别。

I thought about rendering UIButtons as custom buttons with the cover image as Background-image. Is it possible to fade UIButtons in and out? The user can choose a category of publications to be displayed, and ih he changes the category I wanted to fade some publications out.

推荐答案

任何 UIView 的 alpha 属性（包括 UIButton ）可以使用基于块的方法的动画被动画：

The alpha property of any UIView (which includes a UIButton) can be animated using the block-based animations method:

[UIView animateWithDuration:0.25 animations:^{myButton.alpha = 0.0;}];

这将使您的按钮在0.25秒内淡出。将 alpha 设置为1.0以再次淡入。

This will fade your button out over a 0.25 second period. Set the alpha to 1.0 to fade it back in again.

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