- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    UIView  *view =[[UIView alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];

    view.backgroundColor= [UIColor redColor];

       [self.view addSubview:view];

    CAKeyframeAnimation  *an=[self getKeyframeAni];

    [view.layer addAnimation:an forKey:@"sdsd"]；    

}

-(CAKeyframeAnimation *)getKeyframeAni{

    CAKeyframeAnimation* popAni=[CAKeyframeAnimation animationWithKeyPath:@"transform"];

    popAni.duration=0.4;

    popAni.values=@[[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.01, 0.01, 1.0)],[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.1, 1.1, 1.0)],[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.9, 0.9, 1.0)],[NSValue valueWithCATransform3D:CATransform3DIdentity]];

    popAni.keyTimes=@[ ,@0.5,@0.75,@1.0];

    popAni.timingFunctions=@[[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];

    return popAni;

}