return UIApplicationMain(argc, argv, NSStringFromClass([CustomUIApplication class]), NSStringFromClass([AppDelegate class]));

@UIApplicationMain

import Foundation
import UIKit

UIApplicationMain(
    CommandLine.argc,
    UnsafeMutableRawPointer(CommandLine.unsafeArgv)
        .bindMemory(
            to: UnsafeMutablePointer<Int8>.self,
            capacity: Int(CommandLine.argc)),
    NSStringFromClass(FLApplication.self),
    NSStringFromClass(AppDelegate.self)
)

import Foundation
import UIKit

UIApplicationMain(C_ARGC, C_ARGV, NSStringFromClass(FLApplication), NSStringFromClass(AppDelegate))

import UIKit
import Foundation

class FLApplication: UIApplication
{
    override func sendEvent(event: UIEvent!)
    {
        super.sendEvent(event)
        println("send event") // this is an example
        // ... dispatch the message...
    }
}

UIApplicationMain(Process.argc, Process.unsafeArgv, NSStringFromClass(FLApplication), NSStringFromClass(AppDelegate))

UIApplicationMain(CommandLine.argc, CommandLine.unsafeArgv, NSStringFromClass(FLApplication), NSStringFromClass(AppDelegate))