ios 缩放动画

CABasicAnimation *buttonAni = [CABasicAnimation animationWithKeyPath:@"transform.scale"];

//self.startButton.layer.transform = CATransform3DMakeScale(1.5, 1.5, 1);

buttonAni.fromValue = @1.0;

buttonAni.toValue = @1.5;

buttonAni.duration = 0.1;

buttonAni.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];

[self.startButton.layer addAnimation:buttonAni forKey:@"buttonAnimation"];