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What is the difference between viewdidload and viewwillappear?

Answer Posted / Pramod Pratap Singh

ViewDidLoad is a method called by the system when an UIViewController's view is loaded from a nib file or when it is first loaded programmatically. It is only called once during the lifetime of a view controller. On the other hand, ViewWillAppear is called right before the view of the UIViewController appears on screen. Unlike viewDidLoad, this method will be called every time the view appears on screen, even if it's not reloaded.

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