《View Programming Guide for iOS》之frame、bounds和center之间的关系
The
frameproperty contains the frame rectangle, which specifies the size and location of the view in its superview’s coordinate system.
frame是指定父视图的位置和大小的
The
boundsproperty contains the bounds rectangle, which specifies the size of the view (and its content origin) in the view’s own local coordinate system.- bounds是指定当前视图的大小和位置的
The
centerproperty contains the known center point of the view in the superview’s coordinate system.- center是指定在父视图的坐标系统中视图的中心位置

其他博客的一些看法
然后呢 看一下frame、bounds跟center三者的定义描述
frame:描述当前视图在其父视图中的位置和大小
bounds:描述当前视图在其自身坐标系统中的位置和大小。
center:描述当前视图的中心点在其父视图中的位置。
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