核心动画-04-CALayer隐式动画

//
//  ViewController.m
//  04 CALayer的隐式动画
//
//  Created by ZhuJiaCong on 16/4/18.
//  Copyright © 2016年 wxhl. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
{
    CALayer *_layer;
}
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //只有Layer不是View的根Layer时，才能使用隐式动画
    // self.view.layer
    
    //创建一个Layer
    _layer = [CALayer layer];
    _layer.backgroundColor = [UIColor redColor].CGColor;
    _layer.bounds = CGRectMake(0, 0, 100, 100);
    _layer.position = self.view.center;
    
    
    _layer.borderColor = [UIColor orangeColor].CGColor;
    _layer.borderWidth = 5;
    
    
    [self.view.layer addSublayer:_layer];
    
    
    
}


- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    
    //隐式动画
    //当我们在设置Layer的某些属性时，系统会自动的给Layer添加动画
    //动画的实现代码是在系统底层，无法对动画的配置进行修改
//    _layer.transform = CATransform3DMakeRotation(M_PI, 0, 0, 1);
    
    UITouch *touch = [touches anyObject];
    CGPoint location = [touch locationInView:self.view];
    _layer.position = location;
    
    
    //查找文档 可以获取所有支持隐式动画的属性
    //查找关键词 CALayer Animatable Properties
    _layer.backgroundColor = [UIColor greenColor].CGColor;
    //不透明度
    _layer.opacity = 1;
    _layer.borderColor = [UIColor purpleColor].CGColor;
    _layer.borderWidth = 20;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end