Quartz 2D 相关的知识

1, UIView 的 transform 属性 

 

    UIView的transform属性用于控制UIView的缩放，旋转等,有四个方法用来操作

 

    CGAffineTransformMake

    CGAffineTransformMakeRotation//旋转

    CGAffineTransformMakeScale//缩放

    CGAffineTransformMakeTranslation

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