缩放动画

　　　　

 

 

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

            scaleAnimation.fromValue = [NSNumber numberWithFloat:1.0];

            scaleAnimation.toValue = [NSNumber numberWithFloat:1.3];

            scaleAnimation.autoreverses = YES;

            scaleAnimation.fillMode = kCAFillModeForwards;

            scaleAnimation.repeatCount = MAXFLOAT;

            scaleAnimation.duration = 0.8;

            //开演

           [view.layer addAnimation:scaleAnimation forKey:@"scaleAnimation"];