核心动画-06-关键帧动画-day4

  1 //
  2 //  ViewController.m
  3 //  06 关键帧动画
  4 //
  5 //  Created by ZhuJiaCong on 16/4/18.
  6 //  Copyright © 2016年 wxhl. All rights reserved.
  7 //
  8
  9 #import "ViewController.h"
 10
 11 @interface ViewController ()
 12 {
 13     CGMutablePathRef _path;
 14 }
 15 @property (weak, nonatomic) IBOutlet UIView *redView;
 16
 17 @end
 18
 19 @implementation ViewController
 20
 21 - (void)viewDidLoad {
 22     [super viewDidLoad];
 23
 24     _redView.layer.cornerRadius = 10;
 25
 26
 27
 28 }
 29
 30
 31 - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
 32
 33     //关键帧动画
 34 //    CAKeyframeAnimation *keyFrame = [CAKeyframeAnimation animationWithKeyPath:@"position"];
 35 //
 36 //    //创建帧
 37 //    CGPoint point1 = CGPointMake(100, 100);
 38 //    CGPoint point2 = CGPointMake(150, 100);
 39 //    CGPoint point3 = CGPointMake(100, 150);
 40 //    CGPoint point4 = CGPointMake(150, 150);
 41 //    CGPoint point5 = CGPointMake(200, 100);
 42 //    CGPoint point6 = CGPointMake(100, 200);
 43 //
 44 //
 45 //    NSArray *array = @[[NSValue valueWithCGPoint:point1],
 46 //                       [NSValue valueWithCGPoint:point2],
 47 //                       [NSValue valueWithCGPoint:point3],
 48 //                       [NSValue valueWithCGPoint:point4],
 49 //                       [NSValue valueWithCGPoint:point5],
 50 //                       [NSValue valueWithCGPoint:point6]
 51 //                       ];
 52 //
 53 //    keyFrame.values = array;
 54 //
 55 //    keyFrame.duration = 3;
 56 //
 57 //    //将动画添加到图层上去
 58 //    [_redView.layer addAnimation:keyFrame forKey:@"keyFrame"];
 59
 60
 61
 62
 63     if (_path) {
 64         CGPathRelease(_path);
 65         _path = NULL;
 66     }
 67
 68     //创建路径
 69     _path = CGPathCreateMutable();
 70     //设置路径起点
 71     UITouch *touch = [touches anyObject];
 72     CGPoint location = [touch locationInView:self.view];
 73     CGPathMoveToPoint(_path, NULL, location.x, location.y);
 74
 75 }
 76
 77 - (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
 78     //获取触摸点 添加路径点
 79     UITouch *touch = [touches anyObject];
 80     CGPoint location = [touch locationInView:self.view];
 81
 82     CGPathAddLineToPoint(_path, NULL, location.x, location.y);
 83
 84 }
 85
 86 - (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
 87
 88     //执行动画
 89     CAKeyframeAnimation *keyFrame = [CAKeyframeAnimation animationWithKeyPath:@"position"];
 90     keyFrame.path = _path;
 91
 92
 93     keyFrame.duration = 5;
 94
 95
 96
 97     //速度控制函数
 98     keyFrame.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
 99
100
101     [_redView.layer addAnimation:keyFrame forKey:nil];
102
103 }
104
105
106
107 - (void)didReceiveMemoryWarning {
108     [super didReceiveMemoryWarning];
109     // Dispose of any resources that can be recreated.
110 }
111
112 @end