JDUIApplicationExtension.swift

import UIKit

extension UIApplication {
    
    static var applicationName: String {
        let mainBundle = NSBundle.mainBundle()
        let key = String(kCFBundleNameKey)
        let value = mainBundle.objectForInfoDictionaryKey(key) as? String
        return value ?? ""
    }
    
    static var bundleId: String {
        return Bundle.main.bundleIdentifier 
    }
    
    class func mainWindow() -> UIWindow?{
        if let appDelegate = UIApplication.sharedApplication().delegate as? AppDelegate {
            return appDelegate.window
        }
        
        return nil
    }
    
}