Instantiate and Present a viewController in Swift

Question

Issue

I started taking a look on the Swift Programming Language, and somehow I am not able to correctly type the initialization of a UIViewController from a specific UIStoryboard.

In Objective-C I simply write:

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"StoryboardName" bundle:nil]; UIViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"ViewControllerID"]; [self presentViewController:viewController animated:YES completion:nil]; 

Can anyone help me on how to achieve this on Swift?

Answer 1

This answer was last revised for Swift 5.4 and iOS 14.5 SDK.

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It's all a matter of new syntax and slightly revised APIs. The underlying functionality of UIKit hasn't changed. This is true for a vast majority of iOS SDK frameworks.

let storyboard = UIStoryboard(name: "myStoryboardName", bundle: nil) let vc = storyboard.instantiateViewController(withIdentifier: "myVCID") self.present(vc, animated: true) 

Make sure to set myVCID inside the storyboard, under "Storyboard ID."

Answer 2

For people using @akashivskyy's answer to instantiate UIViewController and are having the exception:

fatal error: use of unimplemented initializer 'init(coder:)' for class

Quick tip:

Manually implement required init?(coder aDecoder: NSCoder) at your destination UIViewController that you are trying to instantiate

required init?(coder aDecoder: NSCoder) {     super.init(coder: aDecoder) } 

If you need more description please refer to my answer here