如何在可可中设置一个用淡出动画隐藏的 NSView？

Question

I'm hiding a subview from a CustomView element with the following code:我使用以下代码从 CustomView 元素隐藏子视图：

[[[theViewcont subviews] objectAtIndex:0] setHidden:TRUE]

how can I add a fade animation when hiding this NSView?隐藏此 NSView 时如何添加淡入淡出动画？

Answer 1

Found the solution HERE CocoaDev:CoreAnimation在这里找到解决方案 CocoaDev:CoreAnimation

so when you have something like this to hide your subview:所以当你有这样的东西来隐藏你的子视图时：

[[[theViewcont subviews] objectAtIndex:0] setAlphaValue:0.0];

to animate that action you just should so the following addition:要为该动作设置动画，您只需添加以下内容：

[[[[theViewcont subviews] objectAtIndex:0] animator] setAlphaValue:0.0];

so there you have the right way to 'fade out' a subview in Cocoa.所以你有正确的方法来“淡出”可可中的子视图。