摘要：
UIGestureRecognizer是一个具体手势的基类，提供了较为简单的手势实现方式 The concrete subclasses ofUIGestureRecognizerare the following:UITapGestureRecognizerUIPinchGestureRecognizerUIRotationGestureRecognizerUISwipeGestureRecognizerUIPanGestureRecognizerUILongPressGestureRecognizer一个gesture recognizer是针对一个特定的view的（包含其subview） 阅读全文
摘要：
有五个函数ios 4.0 以后才支持Animating Views with Blocks+ animateWithDuration:delay:options:animations:completion:+ animateWithDuration:animations:completion:+ animateWithDuration:animations:+ transitionWithView:duration:options:animations:completion:+ transitionFromView:toView:duration:options:completion:这三个函 阅读全文