單項(xiàng)選擇題

UIViewController在顯示過(guò)程中,各個(gè)方法的調(diào)用順序是()

A.init->viewDidLoad->viewDidAppear->viewDidUnload
B.init->viewDidAppear->viewDidLoad->viewDidUnload
C.init->viewDidLoad->viewDidUnload->viewDidAppear
D.init->viewDidAppear->viewDidUnload->viewDidLoad

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