一，效果图。
二，代码。
ViewController.m
#import "ViewController.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. UIButton *button=[UIButton buttonWithType:UIButtonTypeRoundedRect]; button.frame=CGRectMake(10, 100, 100, 200); button.backgroundColor=[UIColor redColor]; [button setTitle:@"按钮" forState:UIControlStateNormal]; [self.view addSubview:button]; //按钮的动画效果 [self buttonAnimation:button]; } //按钮出现的时候有一个动画效果 - (void)buttonAnimation:(UIButton *)sender { CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"transform"]; CATransform3D scale1 = CATransform3DMakeScale(0.5, 0.5, 1); CATransform3D scale2 = CATransform3DMakeScale(1.2, 1.2, 1); CATransform3D scale3 = CATransform3DMakeScale(0.9, 0.9, 1); CATransform3D scale4 = CATransform3DMakeScale(1.0, 1.0, 1); NSArray *frameValues = [NSArray arrayWithObjects: [NSValue valueWithCATransform3D:scale1], [NSValue valueWithCATransform3D:scale2], [NSValue valueWithCATransform3D:scale3], [NSValue valueWithCATransform3D:scale4], nil]; [animation setValues:frameValues]; NSArray *frameTimes = [NSArray arrayWithObjects: [NSNumber numberWithFloat:0.0], [NSNumber numberWithFloat:0.5], [NSNumber numberWithFloat:0.9], [NSNumber numberWithFloat:1.0], nil]; [animation setKeyTimes:frameTimes]; animation.fillMode = kCAFillModeForwards; animation.duration = 0.3f; [sender.layer addAnimation:animation forKey:@"DSPopUpAnimation"]; }
