核心动画-06-关键帧动画-day4

//
//  ViewController.m
//  06 关键帧动画
//
//  Created by ZhuJiaCong on 16/4/18.
//  Copyright © 2016年 wxhl. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
{
    CGMutablePathRef _path;
}
@property (weak, nonatomic) IBOutlet UIView *redView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    _redView.layer.cornerRadius = 10;
    
    
    
}


- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    
    //关键帧动画
//    CAKeyframeAnimation *keyFrame = [CAKeyframeAnimation animationWithKeyPath:@"position"];
//    
//    //创建帧
//    CGPoint point1 = CGPointMake(100, 100);
//    CGPoint point2 = CGPointMake(150, 100);
//    CGPoint point3 = CGPointMake(100, 150);
//    CGPoint point4 = CGPointMake(150, 150);
//    CGPoint point5 = CGPointMake(200, 100);
//    CGPoint point6 = CGPointMake(100, 200);
//    
//    
//    NSArray *array = @[[NSValue valueWithCGPoint:point1],
//                       [NSValue valueWithCGPoint:point2],
//                       [NSValue valueWithCGPoint:point3],
//                       [NSValue valueWithCGPoint:point4],
//                       [NSValue valueWithCGPoint:point5],
//                       [NSValue valueWithCGPoint:point6]
//                       ];
//    
//    keyFrame.values = array;
//    
//    keyFrame.duration = 3;
//    
//    //将动画添加到图层上去
//    [_redView.layer addAnimation:keyFrame forKey:@"keyFrame"];
    
    
    
    
    if (_path) {
        CGPathRelease(_path);
        _path = NULL;
    }
    
    //创建路径
    _path = CGPathCreateMutable();
    //设置路径起点
    UITouch *touch = [touches anyObject];
    CGPoint location = [touch locationInView:self.view];
    CGPathMoveToPoint(_path, NULL, location.x, location.y);
    
}

- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    //获取触摸点 添加路径点
    UITouch *touch = [touches anyObject];
    CGPoint location = [touch locationInView:self.view];
    
    CGPathAddLineToPoint(_path, NULL, location.x, location.y);
    
}

- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    
    //执行动画
    CAKeyframeAnimation *keyFrame = [CAKeyframeAnimation animationWithKeyPath:@"position"];
    keyFrame.path = _path;
    
    
    keyFrame.duration = 5;
    
    
    
    //速度控制函数
    keyFrame.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    
    
    [_redView.layer addAnimation:keyFrame forKey:nil];
    
}



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

@end