Swift + Create Main file in Swift

How to Create Main file in Swift 

Next, File->New->File... to create a Swift file and name it main.swift. Here's how it should look for an iOS app:

import UIKit

UIApplicationMain(

    CommandLine.argc,

    UnsafeMutableRawPointer(CommandLine.unsafeArgv)

        .bindMemory(

            to: UnsafeMutablePointer<Int8>.self,

            capacity: Int(CommandLine.argc)),

    nil,

    NSStringFromClass(AppDelegate.self)

)

NOTE : If we have create custom main.swift file then we don't need to write @UIApplicationMain in appDelegate.swift file