如何淡出带有动画的NSView? [英] How to fade out a NSView with animation?

问题描述

这很简单，所以我一生都无法找到问题所在，我将文档作为指南，但仍然无法正常工作.我有一个更大的内部视图. IBAction应该淡化内部视图...就是这样.这就是我所拥有的:

This is as simple as can be so I can't for the life of me find what's wrong, I looked through the documentation as a guide but it still didn't work. I have a view inside a larger view. An IBAction is supposed to fade out the inner view... that's it. Here's what I've got:

NSViewAnimation *theAnim;
NSMutableDictionary *viewDict;

// Create the attributes dictionary for the view.
viewDict = [NSMutableDictionary dictionaryWithCapacity:2];

// Set the target object to be the view.
[viewDict setObject:_innerView forKey:NSViewAnimationTargetKey];

// Set this view to fade out
[viewDict setObject:NSViewAnimationFadeOutEffect forKey:NSViewAnimationEffectKey];

theAnim = [[NSViewAnimation alloc] initWithViewAnimations:@[viewDict]];

// Set some additional attributes for the animation.
[theAnim setDuration:1.0];

// Run the animation.
[theAnim startAnimation];

我用NSLog检查了viewDict和theAnim，但都不是nil.我几乎是从一个我有工作的旧程序中复制过来的，现在找不到问题所在.

I checked the viewDict and theAnim with NSLog and neither are nil. I pretty much copied this from an old program I had where this was working, can't find what's wrong now.

我正在使用Xcode 5.1.1.

I'm using Xcode 5.1.1.

推荐答案

现代方法要容易得多:

[NSAnimationContext runAnimationGroup:^(NSAnimationContext *context) {
    context.duration = 1;
    view.animator.alphaValue = 0;
}
completionHandler:^{
    view.hidden = YES;
    view.alphaValue = 1;
}];

如果视图层次结构是基于图层的，那么实际上就足够了:

If the view hierarchy is layer-backed, it's actually sufficient to do:

view.animator.hidden = YES;

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