iOS 動畫

1,簡單動畫

        [UIView animateWithDuration:(NSTimeInterval) animations:^{
            <#code#>
        } completion:^(BOOL finished) {
            code
        }];

2,延時動畫

        [UIView animateKeyframesWithDuration:(NSTimeInterval) delay:(NSTimeInterval) 
 options:(UIViewKeyframeAnimationOptions) animations:^{
            <#code#>
        } completion:^(BOOL finished) {
            code
        }];
delay表明延時的時間，單位是秒
UIViewKeyframeAnimationOptions經常使用:
//             UIViewAnimationOptionCurveEaseInOut            // default  快進快出
//             UIViewAnimationOptionCurveEaseIn               = 1 << 16,  快進
//             UIViewAnimationOptionCurveEaseOut              = 2 << 16,  快出
//             UIViewAnimationOptionCurveLinear                           勻速

3,transform

label.transform = CGAffineTransformMakeTranslation(0, label.height);
label.transform = CGAffineTransformIdentity;
 
 常配合二段動畫（簡單動畫+延時動畫）使用
 CGAffineTransformMakeTranslation               往座標移動
 CGAffineTransformIdentity                      迴歸原位置