Facebook开源动画库 POP-POPSpringAnimation运用

POPSpringAnimation也许是大多数人使用POP的理由 其提供一个类似弹簧一般的动画效果；实例源代码已经上传至gitHub,地址：https://github.com/wujunyang/facebookPopTest

POPSpringAnimation可配置的属性与默认值为

springBounciness:4.0    //[0-20] 弹力 越大则震动幅度越大

springSpeed     :12.0   //[0-20] 速度 越大则动画结束越快

dynamicsTension :0      //拉力  接下来这三个都跟物理力学模拟相关 数值调整起来也很费时 没事不建议使用哈

dynamicsFriction:0      //摩擦 同上

dynamicsMass    :0      //质量 同上

注意:POPSpringAnimation是没有duration字段的 其动画持续时间由以上几个参数决定

实例1：实现一个X轴运动并有反弹效果的动画，在完成动画后输出当前的坐标值

 //1:初始化第一个视图块
    if (self.myRedView==nil) {
        self.myRedView=[[UIView alloc]initWithFrame:CGRectMake(, , , )];
        self.myRedView.backgroundColor=[UIColor redColor];
        [self.view addSubview:self.myRedView];
    }

    //创建一个POPSpringAnimation动画 实现X轴运动 有反弹效果
    POPSpringAnimation *anSpring = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerPositionX];
    anSpring.toValue =@();
    anSpring.beginTime = CACurrentMediaTime() + 1.0f;
    anSpring.springBounciness=14.0;    //[0-20] 弹力 越大则震动幅度越大
    anSpring.springSpeed=12.0;   //[0-20] 速度 越大则动画结束越快
    [anSpring setCompletionBlock:^(POPAnimation *prop, BOOL fint) {
        if (fint) {
            NSLog(@"self.myRedView.frame=%@",NSStringFromCGRect(self.myRedView.frame));
        }
    }];
    [self.myRedView pop_addAnimation:anSpring forKey:@"myRedViewposition”];

可以查看到动画结束后，输出的值为：self.myRedView.frame={{285, 80}, {30, 30}}

实例2：实现一个视图块闪动的效果，从0.2到1.0的弹效果 缩放效果

//2:初始化一个视图块

    if (self.myLayView==nil) {

        self.myLayView=[[UIView alloc]initWithFrame:CGRectMake(, , , )];

        self.myLayView.backgroundColor=[UIColor blueColor];

        [self.view addSubview:self.myLayView];

    }

    //创建一个POPSpringAnimation动画 实现闪一下效果 从0.2到1.0的弹效果 缩放效果

    POPSpringAnimation *scaleAnimation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerScaleXY];

    scaleAnimation.fromValue  = [NSValue valueWithCGSize:CGSizeMake(0.2, 0.2f)];

    scaleAnimation.toValue  = [NSValue valueWithCGSize:CGSizeMake(1.0f, 1.0f)];

    scaleAnimation.beginTime = CACurrentMediaTime() + 1.0f;

    scaleAnimation.springBounciness = 20.0f;

    scaleAnimation.springSpeed = 20.0f;

    [self.myLayView.layer pop_addAnimation:scaleAnimation forKey:@"scaleAnimation”];

实例3：创建一个POPSpringAnimation动画 将视图进行旋转

 //3:初始化一个视图块

    if (self.myRotaView==nil) {

        self.myRotaView=[[UIView alloc]initWithFrame:CGRectMake(, , , )];

        self.myRotaView.backgroundColor=[UIColor yellowColor];

        [self.view addSubview:self.myRotaView];

    }

    //创建一个POPSpringAnimation动画 将视图进行旋转

    POPSpringAnimation *rotationAnimation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerRotation];

    rotationAnimation.beginTime = CACurrentMediaTime() + 0.2;

    rotationAnimation.toValue = @(1.2);

    rotationAnimation.springBounciness = .f;

    rotationAnimation.springSpeed = ;

    [self.myRotaView.layer pop_addAnimation:rotationAnimation forKey:@"rotationAnim”];

实例4：创建一个POPSpringAnimation动画  按键左右摇动

//4:初始化一个按键

    if (self.myButton==nil) {

        self.myButton=[[UIButton alloc]init];

        self.myButton.frame=CGRectMake(, , , );

        self.myButton.backgroundColor = [UIColor grayColor];

        [self.myButton setTitle:@"登录" forState:UIControlStateNormal];

        [self.myButton addTarget:self action:@selector(touchUpInside:) forControlEvents:UIControlEventTouchUpInside];

        [self.view addSubview:self.myButton];

    }

响应事件内容：

-(void)touchUpInside:(id)sender

{

    //创建一个POPSpringAnimation动画  按键左右摇动

    POPSpringAnimation *positionAnimation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerPositionX];

    positionAnimation.velocity = @;

    positionAnimation.springBounciness = ;

    [positionAnimation setCompletionBlock:^(POPAnimation *animation, BOOL finished) {

        self.myButton.userInteractionEnabled = YES;

    }];

    [self.myButton.layer pop_addAnimation:positionAnimation forKey:@"positionAnimation"];

}

实例5：结合先前的POPBasicAnimation动画，制画一个综合的动画效果，就是向下显示一个视图，又可以回收回去；

@interface OtherViewController ()

@property(assign,nonatomic)BOOL isMenuOpen;

@property(strong,nonatomic)UIView *myMenuView;

@property(nonatomic)CGPoint VisiblePosition,HiddenPosition;

@end

@implementation OtherViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    self.view.backgroundColor=[UIColor whiteColor];

    _isMenuOpen=NO;

    self.VisiblePosition=CGPointMake(, );

    self.HiddenPosition=CGPointMake(, -);

    UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc] initWithTitle:@"显示" style:UIBarButtonItemStylePlain

                                                                     target:self action:@selector(refreshPropertyList)];

    self.navigationItem.rightBarButtonItem = anotherButton;

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

-(void)refreshPropertyList

{

    if (_isMenuOpen) {

        [self hidePopup];

    }

    else

    {

        [self showPopup];

    }

}

//隐藏时响应

- (void)hidePopup

{

    _isMenuOpen = NO;

    POPBasicAnimation *opacityAnimation = [POPBasicAnimation animationWithPropertyNamed:kPOPLayerOpacity];

    opacityAnimation.fromValue = @();

    opacityAnimation.toValue = @();

    [self.myMenuView.layer pop_addAnimation:opacityAnimation forKey:@"opacityAnimation"];

    POPBasicAnimation *positionAnimation = [POPBasicAnimation animationWithPropertyNamed:kPOPLayerPosition];

    positionAnimation.fromValue = [NSValue valueWithCGPoint:self.VisiblePosition];

    positionAnimation.toValue = [NSValue valueWithCGPoint:self.HiddenPosition];

    [self.myMenuView.layer pop_addAnimation:positionAnimation forKey:@"positionAnimation"];

    POPSpringAnimation *scaleAnimation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerScaleXY];

    scaleAnimation.fromValue  = [NSValue valueWithCGSize:CGSizeMake(1.0f, 1.0f)];

    scaleAnimation.toValue  = [NSValue valueWithCGSize:CGSizeMake(0.5f, 0.5f)];

    [self.myMenuView.layer pop_addAnimation:scaleAnimation forKey:@"scaleAnimation"];

}

//显示时响应

- (void)showPopup

{

    //初始化视图

    if (self.myMenuView==nil) {

        self.myMenuView=[[UIView alloc]initWithFrame:CGRectMake(,, , )];

        self.myMenuView.backgroundColor=[UIColor redColor];

        [self.view addSubview:self.myMenuView];

    }

    _isMenuOpen = YES;

    POPBasicAnimation *opacityAnimation = [POPBasicAnimation animationWithPropertyNamed:kPOPLayerOpacity];

    opacityAnimation.fromValue = @();

    opacityAnimation.toValue = @();

    opacityAnimation.beginTime = CACurrentMediaTime() + 0.1;

    [self.myMenuView.layer pop_addAnimation:opacityAnimation forKey:@"opacityAnimation"];

    POPBasicAnimation *positionAnimation = [POPBasicAnimation animationWithPropertyNamed:kPOPLayerPosition];

    positionAnimation.fromValue = [NSValue valueWithCGPoint:self.HiddenPosition];

    positionAnimation.toValue = [NSValue valueWithCGPoint:self.VisiblePosition];

    [self.myMenuView.layer pop_addAnimation:positionAnimation forKey:@"positionAnimation"];

    POPSpringAnimation *scaleAnimation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerScaleXY];

    scaleAnimation.fromValue  = [NSValue valueWithCGSize:CGSizeMake(0.5, 0.5f)];

    scaleAnimation.toValue  = [NSValue valueWithCGSize:CGSizeMake(1.0f, 1.0f)];

    scaleAnimation.springBounciness = 20.0f;

    scaleAnimation.springSpeed = 20.0f;

    [self.myMenuView.layer pop_addAnimation:scaleAnimation forKey:@"scaleAnimation"];

}

@end

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