Macos 如何使用Facebook Pop动画从中心缩放NSView?
请注意,这是一个与Mac OS X(Macos 如何使用Facebook Pop动画从中心缩放NSView?,macos,core-animation,nsview,facebook-pop,Macos,Core Animation,Nsview,Facebook Pop,请注意,这是一个与Mac OS X(NSView)相关的问题 我正在尝试使用Facebook的流行动画从中心缩放NSView(到其大小的75%),然后再恢复到100%,但是我无法让它工作。鉴于kPOPLayerScaleXY似乎不起作用,我执行了以下操作,但结果不正确(因为它似乎从左上角向下缩放,当zoomIn为false时,它变大了: CGRect baseRect = CGRectMake(0, 0, 30, 24); CGFloat scale = (zoomIn) ? 0.75
NSView
)相关的问题
我正在尝试使用Facebook的流行动画从中心缩放NSView(到其大小的75%),然后再恢复到100%,但是我无法让它工作。鉴于kPOPLayerScaleXY
似乎不起作用,我执行了以下操作,但结果不正确(因为它似乎从左上角向下缩放,当zoomIn
为false时,它变大了:
CGRect baseRect = CGRectMake(0, 0, 30, 24);
CGFloat scale = (zoomIn) ? 0.75 : 1.0;
CGFloat x = baseRect.origin.x;
CGFloat y = baseRect.origin.y;
CGFloat width = baseRect.size.width;
CGFloat height = baseRect.size.height;
if (zoomIn) {
width -= floorf((1.0 - scale) * width);
height -= floorf((1.0 - scale) * height);
x += floorf((width * (1.0f - scale)) / 2);
y += floorf((height * (1.0f - scale)) / 2);
}
CGRect scaleRect = CGRectMake(x, y, width, height);
[myView.layer pop_removeAllAnimations];
POPSpringAnimation *animation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerBounds];
animation.springBounciness = 8;
animation.toValue = [NSValue valueWithCGRect: scaleRect];
[myView.layer pop_addAnimation:animation forKey:@"zoom"];
我最终通过使用两个动画实现了它:
CGRect baseRect = CGRectMake(0, 0, 30, 24);
CGFloat scale = (zoomIn) ? 0.80 : 1.0;
CGFloat x = baseRect.origin.x;
CGFloat y = baseRect.origin.y;
if (zoomIn) {
x = floorf((baseRect.size.width * (1.0 - scale)) / 2);
y = floorf((baseRect.size.height * (1.0 - scale)) / 2);
}
[myView.layer pop_removeAllAnimations];
POPSpringAnimation *animation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerScaleXY];
animation.springBounciness = 8;
animation.toValue = [NSValue valueWithCGSize:CGSizeMake(scale, scale)];
[myView.layer pop_addAnimation:animation forKey:@"zoom"];
animation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerTranslationXY];
animation.springBounciness = 8;
animation.toValue = [NSValue valueWithCGPoint:CGPointMake(x, y)];
[myView.layer pop_addAnimation:animation forKey:@"translate"];
同样的问题。在设置层的
框架
和锚点
后,所有工作都会正常进行。