POP动画引擎中Layer与CALayer的一点区别

#import "ViewController.h"
#import <POP.h>

@interface ViewController ()

// 测试CALayer
@property (nonatomic, strong) CALayer *normalLayer;
// 用于测试POP的Layer
@property (nonatomic, strong) CALayer *popLayer;

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    
    [self setupNormalLayer];
    
    // 一秒后移除所有动画
    [self performSelector:@selector(stopAnimation) withObject:nil afterDelay:1.f];
}

- (void)setupPopLayer
{
    // 初始化
    self.popLayer = [CALayer layer];
    self.popLayer.frame = CGRectMake(0, 0, 100, 100);
    self.popLayer.backgroundColor = [UIColor redColor].CGColor;
    [self.view.layer addSublayer:self.popLayer];
    // 添加POP动画
    POPBasicAnimation *basicAnimation = [POPBasicAnimation animationWithPropertyNamed:@"position"];
    basicAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(self.popLayer.position.x, 300)];
    basicAnimation.duration = 3.f;
    [self.popLayer pop_addAnimation:basicAnimation forKey:nil];
}

- (void)setupNormalLayer
{
    // 初始化
    self.normalLayer = [CALayer layer];
    self.normalLayer.frame = CGRectMake(0, 0, 100, 100);
    self.normalLayer.backgroundColor = [UIColor redColor].CGColor;
    [self.view.layer addSublayer:self.normalLayer];
    // 添加动画
    CABasicAnimation *basicAnimation = [CABasicAnimation animationWithKeyPath:@"position"];
    basicAnimation.fromValue = [NSValue valueWithCGPoint:CGPointMake(self.normalLayer.position.x, self.normalLayer.position.y)];
    basicAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(self.normalLayer.position.x, 300)];
    basicAnimation.duration = 3.f;
    [self.normalLayer addAnimation:basicAnimation forKey:nil];
    
    self.normalLayer.position = CGPointMake(self.normalLayer.position.x, 300);
}

- (void)stopAnimation
{
    [self.normalLayer removeAllAnimations];
//    [self.popLayer pop_removeAllAnimations];
}

@end