zsisme
ios核心动画高级技巧

Updated 4 years ago

gechanghang1 (@gechanghang1) started discussion #62

4 years ago · 0 comments

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    每一个UIview都有一个CALayer实例的图层属性,也就是所谓的backing layer,视图的职责就是创建并管理这个图层,以确保当子视图在层级关系中添加或者被移除的时候,他们关联的图层也同样对应在层级关系树当中有相同的操作(见图1.2)。 图1.2 图层的树状结构(左边)以及对应的视图层级(右边)

图层与视图 (Edit this file)

UIview 应该是UIView

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