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我正在编写将动画 NSTextView 跨窗口移动的代码。我希望用户可以设置持续时间。

这个版本工作正常:

 // code to setup TextView

[centerView addSubview:targetTextView];

[NSAnimationContext beginGrouping];
float finalDuration = expf((11-duration)/5) + 2;
[[NSAnimationContext currentContext] setDuration:(finalDuration)];
[[targetTextView animator]setFrame:NSMakeRect(-170,(centerViewRect.size.height * 1/2) - 40,160,80)];
[NSAnimationContext endGrouping];

这将时间保留为默认值:

 // code to setup TextView

[centerView addSubview:targetTextView];

CABasicAnimation *posAnim = [CABasicAnimation animationWithKeyPath:@"frame"];
[posAnim setFromValue:[NSValue valueWithRect:NSMakeRect(centerViewRect.size.width - 170,(centerViewRect.size.height * 2/3) - 40,160,80)]];
[posAnim setToValue:[NSValue valueWithRect:NSMakeRect(10,(centerViewRect.size.height * 2/3) - 40,160,80)]];
float finalDuration = expf((11-duration)/5) + 2;
[posAnim setDuration:finalDuration];
[targetTextView setAnimations:[NSDictionary dictionaryWithObjectsAndKeys:posAnim,@"frame",nil]];
[[targetTextView animator]setFrame:NSMakeRect(-170,(centerViewRect.size.height * 1/2) - 40,160,80)];

谁能告诉我为什么第一个有效而第二个无效?他们似乎和我一样。

谢谢!

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1 回答 1

2

对于您要使用的 CABasicAnimation
[CATransaction setAnimationDuration:yourDuration];

于 2012-08-20T16:26:07.827 回答