I only added this "NSViewAnimationEndFrameKey" just to make sure that
any animation happens at all. Yeah it does happen. But the button
just does not fade out - with or without this
NSViewAnimationEndFrameKey. It waits for 5.0 seconds (as i specified)
and suddenly disappear. It just feels like i ran into one of the
"bugs". Or maybe i am doing something wrong..
This method
-(IBAction)clickMeButton:(id)sender {
NSLog(@"started");
NSViewAnimation *viewAnimation = [[NSViewAnimation alloc]
initWithViewAnimations:
[NSArray arrayWithObjects:
[NSDictionary dictionaryWithObjectsAndKeys:
sender,NSViewAnimationTargetKey,
NSViewAnimationFadeOutEffect, NSViewAnimationEffectKey,
nil],
nil]];
[viewAnimation setDuration:5.0];
[viewAnimation startAnimation];
NSLog(@"ended");
}
behaves as i just described.
2011/5/19 Quincey Morris <quinceymor...@earthlink.net>:
> On May 19, 2011, at 13:14, Nick wrote:
>
>> Weirdly enough, this does not work:
>> NSLog(@"started");
>> NSViewAnimation *viewAnimation = [[NSViewAnimation alloc]
>> initWithViewAnimations:
>>
>> [NSArray arrayWithObjects:
>>
>> [NSDictionary dictionaryWithObjectsAndKeys:
>>
>> sender,NSViewAnimationTargetKey,
>>
>> NSViewAnimationFadeOutEffect, NSViewAnimationEffectKey,
>>
>> [NSValue valueWithRect:NSMakeRect(200, 200, 200, 200)],
>>
>> NSViewAnimationEndFrameKey,
>>
>> nil],
>>
>> nil]];
>>
>> [viewAnimation setDuration:5.0];
>> [viewAnimation startAnimation];
>> NSLog(@"ended");
>>
>> the button moves, but it does not fade out. It just disappears from
>> its final location and after a while appears in the middle of the
>> parent View.
>
> You need to experiment with the parameters till you find a combination that
> gives the visual effect you expect.
>
> IIRC, the documentation is a little confusing because it leads you to believe
> that specifying a new frame rect is orthogonal to the fade. In fact, I seem
> to recall, specifying a frame rect indicates that you want the view to be
> visible at that size and position, and thus conflicts with the fade,
> producing the kind of inconsistent behavior you're seeing. Try leaving that
> key out of the dictionary.
>
> The problem, again IIRC, is that only the alpha can change smoothly, not the
> "isHidden" property, which can only be on or off. The "isHidden" property
> isn't being animated, just changed at certain points in the animation. You've
> asked for it to be both on and off at the end of the animation, and one of
> those wins.
>
> Remember also that NSViewAnimation is a subclass of NSAnimation, so you
> should be able to use a delegate (for example) to do what you want at the end
> of the animation.
>
>
>
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