[iphone] App store link for "rate/review this app"

Update:

Swift 5.1, Xcode 11

Tested on Real Device iOS 13.0 (Guarantee to work)

import StoreKit

func rateApp() {

    if #available(iOS 10.3, *) {

        SKStoreReviewController.requestReview()
    
    } else {

        let appID = "Your App ID on App Store"
        let urlStr = "https://itunes.apple.com/app/id\(appID)" // (Option 1) Open App Page    
        let urlStr = "https://itunes.apple.com/app/id\(appID)?action=write-review" // (Option 2) Open App Review Page
        
        guard let url = URL(string: urlStr), UIApplication.shared.canOpenURL(url) else { return }
        
        if #available(iOS 10.0, *) {
            UIApplication.shared.open(url, options: [:], completionHandler: nil)
        } else {
            UIApplication.shared.openURL(url) // openURL(_:) is deprecated from iOS 10.
        }
    }
}