Question

我尝试使用以下代码在点击时左右两侧减小RationalSet的宽度。但相反，它只会缩小UIButton的大小。代码是

UIButton

但输出正在缩小我不想要的-(void)loginclickAction:(id)sender { self.centerZoom = [CAKeyframeAnimation animationWithKeyPath:@"transform"]; self.centerZoom.duration = 1.5f; self.centerZoom.values = @[[NSValue valueWithCATransform3D:CATransform3DMakeScale(1, 1, 1)],[NSValue valueWithCATransform3D:CATransform3DMakeScale(.9, .9, .9)],[NSValue valueWithCATransform3D:CATransform3DMakeScale(.8,.8, .8)],[NSValue valueWithCATransform3D:CATransform3DMakeScale(.7, .7, .7)],[NSValue valueWithCATransform3D:CATransform3DMakeScale(.6, .6, .6)],[NSValue valueWithCATransform3D:CATransform3DMakeScale(.5, .5,.5)]]; self.centerZoom.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut]; self.loginButton.transform = CGAffineTransformMakeScale(.5,.5); self.loginButton.alpha = 1; [self.loginButton.layer addAnimation:self.centerZoom forKey:@"buttonScale"]; [self.loginButton setUserInteractionEnabled:NO]; }。请帮我找到减少动画按钮宽度的方法。

Answer 1

您需要一种只能在宽度上缩放按钮的方法。使用下面的方法，通过动画将按钮从全宽度水平缩放到一半 -

-(void) reduceButtonWidthFromLeftAndRightWithAniamation:(UIButton *)button
{
    [UIView beginAnimations:@"ScaleButton" context:NULL];
    [UIView setAnimationDuration: 1.5f];
    button.transform = CGAffineTransformMakeScale(0.5, 1.0);
    [UIView commitAnimations];
}

Answer 2

您的转换正在影响多个维度：

CGAffineTransformMakeScale(.5, .5);

这是缩放宽度（x）和高度（y），仅缩放宽度：

CGAffineTransformMakeScale(.5, 1);

同样适用于

CATransform3DMakeScale(.9, .9, .9)

正在改变x，y和z尺寸，应为

CATransform3DMakeScale(.9, 1, 1)

如何通过动画从左右两侧减小UIButton的宽度？

2 个答案: