小部件消失後會調用哪些功能？

Question

什麼是小部件生命週期？哪個函數首先被調用？

Answer 1

viewDidLoad()在視圖生命週期中僅調用一次。

根據您的需求，使用方法：

override func viewWillAppear(_ animated: Bool) { 
    super.viewWillAppear(animated) 
    // do stuff you want to do before the view actually appears 
} 

或：

override func viewDidAppear(_ animated: Bool) { 
    super.viewDidAppear(animated) 
    // do stuff you want to do when the view appears 
} 

有關一個UIView小號生命週期訪問Apples Documentation