#import "ViewController.h"

#import <POP.h>

@interface ViewController ()

@property (nonatomic, weak) UIView *testView;

@end

@implementation ViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.view.backgroundColor = [UIColor blackColor];

    // 初始化测试控件

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

    testView.center          = self.view.center;

    testView.backgroundColor = [UIColor redColor];

    self.testView            = testView;

    [self.view addSubview:testView];

}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

{

    // 初始化弹簧动画

    POPSpringAnimation *springAnimation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerBounds];

    springAnimation.springSpeed         = ;                    // 设置动画速度(常用)

    springAnimation.springBounciness    = ;                   // 设置弹性大小(常用)

    // springAnimation.dynamicsFriction    = 10;                // 设置阻止弹性的阻力(选用)

    // springAnimation.dynamicsTension     = 100;               // 设置弹性的张力(可以理解为每次变大的程度, 选用)

    if (self.testView.frame.size.width == ) {

        springAnimation.toValue = [NSValue valueWithCGRect:CGRectMake(, , , )];

    } else {

        springAnimation.toValue = [NSValue valueWithCGRect:CGRectMake(, , , )];

    }

    // 添加动画

    [self.testView.layer pop_addAnimation:springAnimation forKey:nil];

}

@end