The processing of the frame after the iOS learning record AutoLayout

After the interface uses automatic layout, the value of the frame in the Viewdidload method in the code is not real-time and is still a frame relative to the 600 * 600 interface. needs to be obtained in viewwillappear or Viewdidappear methods. The UIView frame is correct, because the view is all initialized at this time.

The question of a cagradientlayer frame is recorded, and its frame is relative to the location of the parent view (that is, the view that needs to be insertsublayer), so the position of the oragin in relation to the view.

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The processing of the frame after the iOS learning record AutoLayout