How to open twitter page in twitter app from my iphone app?

Question

The page I want to open using twitter app:

https://twitter.com/#!/PAGE

To open twitter app I use the following code:

Answer 1

This is the full code required in Swift. I am using Swift 4 but i believe it is the same for Swift 3.

let Username =  "YOUR_USERNAME_HERE" 
let appURL = NSURL(string: "twitter:///user?screen_name=\(Username)")!
let webURL = NSURL(string: "https://twitter.com/\(Username)")!
let application = UIApplication.shared
if application.canOpenURL(appURL as URL) {
      application.open(appURL as URL)
    } else {
        // if Twitter app is not installed, open URL inside Safari
        application.open(webURL as URL)
    }

Don't forget to add the Info keys needed to use canOpenURL: