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动画与隐式自动布局不正确

[英]animation not correct with implicit autolayout

原文 2015-01-21 01:22:32 1 1 ios/ animation/ autolayout

I upload my demo code here: https://github.com/liuxuan30/Problems 我在此处上传演示代码： https : //github.com/liuxuan30/Problems

The main problem is, I had a view which have a scroll view inside, and there is a label and collection view inside scroll view. 主要问题是，我有一个内部带有滚动视图的视图，并且在滚动视图内部有一个标签和集合视图。

There will be a unread message button generated by code, when there is unread messages, the button will pop out, and I expect the animation: label and collection view will down-shift by the button's height. 代码将产生一个未读消息按钮，当有未读消息时，该按钮将弹出，并且我希望动画：标签和集合视图将按按钮的高度向下移动。

When I test the animation without adding the button in subviews, animate as expected. 当我测试动画而不在子视图中添加按钮时，请按预期进行动画处理。

When I add the button in, it seems like the label and collection view's origin.Y up-shifted, and start the animation. 当我添加按钮时，好像标签和集合视图的原点。Y向上移动，然后开始动画。 Turning off auto layout will solve it, but I have to have auto layout. 关闭自动布局将解决该问题，但是我必须具有自动布局。 I tried to add constraints for all views, but the animation still not work out. 我尝试为所有视图添加约束，但是动画仍然无法解决。

You can try comment out [self.HomeScrollView addSubview:AlertView]; 您可以尝试注释掉[self.HomeScrollView addSubview:AlertView]; and self.UnreadAlertView.alpha = 1.0f; 和self.UnreadAlertView.alpha = 1.0f; inside the code to see the animation. 在代码中查看动画。

Hope someone could figure out where i did wrong. 希望有人能弄清楚我做错了什么。

1 个解决方案

UICollectionView is already a subclass of UIScrollView . UICollectionView已经是UIScrollView的子类。 Embedding your collection view inside a scroll view may be what is causing problems with your animation. 将集合视图嵌入滚动视图中可能是导致动画出现问题的原因。

Try removing your scroll view and just put your UIButton , UILabel , and UICollectionView inside your overarching view. 尝试删除滚动视图，然后将UIButton ， UILabel和UICollectionView放在总体视图中。