捉襟见肘之UIViewAnimationOptions

[UIView animateWithDuration:duration
                          delay:0.0f
                        options:(curve <<  | UIViewAnimationOptionBeginFromCurrentState)
                     animations:animation
                     completion:completion];

在UIView 的animateWithDuration这个函数中options属性常常见到，但却不知道如何设置和知晓它的含义作用，通过文档我们发现：

enum {
   UIViewAnimationOptionLayoutSubviews            =  <<  ,
   UIViewAnimationOptionAllowUserInteraction      =  <<  ,
   UIViewAnimationOptionBeginFromCurrentState     =  <<  ,
   UIViewAnimationOptionRepeat                    =  <<  ,
   UIViewAnimationOptionAutoreverse               =  <<  ,
   UIViewAnimationOptionOverrideInheritedDuration =  <<  ,
   UIViewAnimationOptionOverrideInheritedCurve    =  <<  ,
   UIViewAnimationOptionAllowAnimatedContent      =  <<  ,
   UIViewAnimationOptionShowHideTransitionViews   =  <<  ,
   UIViewAnimationOptionOverrideInheritedOptions  =  <<  ,

   UIViewAnimationOptionCurveEaseInOut            =  << ,
   UIViewAnimationOptionCurveEaseIn               =  << ,
   UIViewAnimationOptionCurveEaseOut              =  << ,
   UIViewAnimationOptionCurveLinear               =  << ,

   UIViewAnimationOptionTransitionNone            =  << ,
   UIViewAnimationOptionTransitionFlipFromLeft    =  << ,
   UIViewAnimationOptionTransitionFlipFromRight   =  << ,
   UIViewAnimationOptionTransitionCurlUp          =  << ,
   UIViewAnimationOptionTransitionCurlDown        =  << ,
   UIViewAnimationOptionTransitionCrossDissolve   =  << ,
   UIViewAnimationOptionTransitionFlipFromTop     =  << ,
   UIViewAnimationOptionTransitionFlipFromBottom  =  << ,
};
typedef NSUInteger UIViewAnimationOptions;

Description:Options for animating views using block objects.

首先，她是枚举，通过文字表面的意思我们大概都明白她们基本作用：UIView在Animation时候进行的变化(Curve或者Transform)，可以把他们分为：动画执行的制约option、动画Curve的效果、动画Transform的效果。没了，我就理解这么多，细节决定质量，还需要不断在应用中实践和理解。

这是其他博友写的：

http://www.cnblogs.com/xiaobajiu/p/4084747.html