CODEWITHSUNDEEP
iosswiftxcodeprotocolsviper
Faizul Karim
Faizul Karim

Reputation: 146

UI is not updating after Protocol call Xcode

I was trying to implement viper architecture on my Xcode. I am following an article https://medium.com/cr8resume/viper-architecture-for-ios-project-with-simple-demo-example-7a07321dbd29.

also, I downloaded the article source code, and run well also UI is changing. but when I created a new project with swift 5 and copy all methods and classes. after running UI is not updating but both codes are the same. please check below

This is a single-page sample code

please check this Github for my project https://github.com/Faizulkarim/movieHut/tree/main/MovieHutWithViper

This is my protocol

 protocol PresenterToViewProtocol: AnyObject{
func showMovieList(MovieList: Array<movieModel>)

 }

Here o call showMovieListMethod

extension MoviePresenter : InteractorToPresenterProtocol {
func movieFetchSuccess(movieModelArray: Array<movieModel>) {
    view?.showMovieList(MovieList: movieModelArray)
  }

}

// on MovieListViewController confirmed delegate

extension MovieListViewController:PresenterToViewProtocol{
func showMovieList(MovieList: Array<movieModel>) {
        self.Movies = MovieList
         self.cover.backgroundColor = UIColor.red
         print(self.movies.count)
        self.trandingTableView.reloadData()
 }
}

on showMovieList function call, it's printing the total count of movies. But when I reloadtableview() table view is not interacting is showing any data. Even when I set to change the background of a view it's not changing. when I set breakpoint is' stop. So protocol is called properly but UI is not updating. i search in google didn't find relevant answer.

Upvotes: 1

Views: 212

Answers (1)

Mercol K
Mercol K

Reputation: 9

You might be in a background thread. You can only update UI from main thread.

Try to update like this:

DispatchQueue.main.async {
    self.trandingTableView.reloadData()
}

Upvotes: 0

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