CAAnimationGroup 組動(dòng)畫

 CABasicAnimation * basic =   [CABasicAnimation animationWithKeyPath:@"bounds"];
    basic.duration = 5;
   basic.fromValue = [NSValue valueWithCGRect:CGRectMake(0, 0, 200, 200)];
    basic.toValue = [NSValue valueWithCGRect:CGRectMake(0, 0, 300, 300)];
   
    CAKeyframeAnimation * keyFrame = [CAKeyframeAnimation animationWithKeyPath:@"backgroundColor"];
    keyFrame.duration = 5;
    keyFrame.values = @[(id)[UIColor greenColor].CGColor , (id)[UIColor blueColor].CGColor , (id)[UIColor purpleColor].CGColor , (id)[UIColor whiteColor].CGColor];
    keyFrame.keyTimes = @[@(0.1),@(0.4),@(0.6),@(0.7)];
    
    
    
    創(chuàng)建動(dòng)畫
    CAAnimationGroup * gorup =   [CAAnimationGroup animation];
    
     設(shè)置組動(dòng)畫
    gorup.animations = @[keyFrame,basic];
    gorup.duration = 5;

     組動(dòng)畫的時(shí)長(zhǎng)  >  組中所有動(dòng)畫的最長(zhǎng)時(shí)間的時(shí)候, 動(dòng)畫的時(shí)間以組中最長(zhǎng)的時(shí)間為準(zhǔn) ,
     組動(dòng)畫的時(shí)間  <  組中所有動(dòng)畫的最長(zhǎng)時(shí)間, 動(dòng)畫的時(shí)間以group的時(shí)長(zhǎng)為準(zhǔn)
    最完美: group的時(shí)長(zhǎng) = 組中所有動(dòng)畫的最長(zhǎng)時(shí)間
    
    添加動(dòng)畫
    [self.changeView.layer addAnimation:gorup forKey:nil];