Swift Reload a View Controller

Question

I need to refresh a view controller when a certain button is tapped  Simply activating viewDidLoad   does not seem to be working for what I need to do  However  when I leave the view controller then come back to it  it seems to work perfectly   How can I refresh reload a view controller as if I have left it then come back to it without ever actually leaving it

User · Answer

If you need to update the canvas by redrawing views after some change  you should call setNeedsDisplay   Thank you  Vincent from an earlier comment

User · Answer

If you are using a navigation controller you can segue again to the current UIViewController and it will be refreshed

User · Answer

Whatever code you are writing in viewDidLoad  Add that in viewWillappear    This will solve your problem

User · Answer

This might be a little late  but did you try calling loadView

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Swift 5 2  The only method I found to work and refresh a view dynamically where the visibility of buttons had changed was -  viewWillAppear true    This may be a bad practice but hopefully somebody will leave a comment

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View Life Cycle  it will load ViewWillAppear everytime you open the view  above is the link to the picture View Controller Lifecycle    viewWillAppear     Called just before the view controller   s content view is added to the app   s view hierarchy  Use this method to trigger any operations that need to occur before the content view is presented onscreen  Despite the name  just because the system calls this method  it does not guarantee that the content view will become visible  The view may be obscured by other views or hidden  This method simply indicates that the content view is about to be added to the app   s view hierarchy    https   developer apple com library archive referencelibrary GettingStarted DevelopiOSAppsSwift WorkWithViewControllers html

User · Answer

In Swift 4   self view layoutIfNeeded

User · Answer

You shouldn t call viewDidLoad method manually  Instead if you want to reload any data or any UI  you can use this   override func viewDidLoad         super viewDidLoad         let myButton   UIButton           When user touch myButton  we re going to call loadData method     myButton addTarget self  action   selector self loadData   forControlEvents   TouchUpInside          Load the data     self loadData       func loadData            code to load data from network  and refresh the interface     tableView reloadData       Whenever you want to reload the data and refresh the interface  you can call self loadData

[ios] Swift: Reload a View Controller

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