int main(int argc, char *argv[]) {
    @autoreleasepool {
        return UIApplicationMain(argc, argv, nil,
            NSStringFromClass([AppDelegate class]));
    }
}



import UIKit
UIApplicationMain(
    CommandLine.argc, CommandLine.unsafeArgv, nil,
        NSStringFromClass(AppDelegate.self)
)



override func viewDidLoad() {
    super.viewDidLoad()
    self.view.backgroundColor = .red
}



