CAKeyframeAnimation简单实用

//
// MJViewController.m
// 06-核心动画02-CAKeyframeAnimation
//
// Created by apple on 14-4-21.
// Copyright (c) 2014年 itcast. All rights reserved.
//

#import "MJViewController.h"

@interface MJViewController ()
@property (weak, nonatomic) IBOutlet UIView *redView;

@end

@implementation MJViewController

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}

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

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

// 创建一个路径
CGMutablePathRef path = CGPathCreateMutable();

// 添加一个圆到这个路径
CGPathAddEllipseInRect(path, NULL, CGRectMake(100, 100, 200, 200));
anim.path = path;

// 释放这个路径（Create出来的对象都需要释放）
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];

// 监听动画的执行
anim.delegate = self;

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

@end