coreAnimation核心动画(二)CAKeyframeAnimation

//
//  ViewController.m
//  coreAnimation
//
//  Created by ys on 15/11/21.
//  Copyright (c) 2015年 ys. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIView *blackView;
@end

@implementation ViewController

- (void)viewDidLoad
{
[super viewDidLoad];

}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
CAKeyframeAnimation *anim = [CAKeyframeAnimation animation];

anim.keyPath = @"position";
anim.removedOnCompletion = NO;
anim.fillMode = kCAFillModeForwards;
anim.duration = 2.0;

CGMutablePathRef path = CGPathCreateMutable();
CGPathAddEllipseInRect(path, NULL, CGRectMake(100, 100, 200, 200));
anim.path = path;
CGPathRelease(path);

// 设置动画的执行节奏
// kCAMediaTimingFunctionEaseInEaseOut : 一开始比较慢, 中间会加速,  临近结束的时候, 会变慢
anim.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
anim.delegate = self;

[self.blackView.layer addAnimation:anim forKey:nil];
}

#pragma mark - 动画的代理方法
#pragma mark 动画开始的时候调用
- (void)animationDidStart:(CAAnimation *)anim
{
NSLog(@"animationDidStart");
}
#pragma mark 动画结束的时候调用
- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag
{
NSLog(@"animationDidStop");
}

- (void)testMove
{
//    CABasicAnimation  fromValue --> toValue

CAKeyframeAnimation *anim = [CAKeyframeAnimation animation];

anim.keyPath = @"position";

NSValue *v1 = [NSValue valueWithCGPoint:CGPointZero];
NSValue *v2 = [NSValue valueWithCGPoint:CGPointMake(100, 0)];
NSValue *v3 = [NSValue valueWithCGPoint:CGPointMake(100, 200)];
NSValue *v4 = [NSValue valueWithCGPoint:CGPointMake(0, 200)];
anim.values = @[v1, v2, v3, v4];

//    anim.keyTimes = @[@(0.5), @(0.25), @(0.25)];

anim.duration = 2.0;

anim.removedOnCompletion = NO;
anim.fillMode = kCAFillModeForwards;

[self.blackView.layer addAnimation:anim forKey:nil];
}

@end