创建主入口 main.swift:
import UIKit
UIApplicationMain(
Process.argc, Process.unsafeArgv,
NSStringFromClass(MainApp), NSStringFromClass(MainAppDelegate)
)
创建 app.swift, 对应 MainApp 和 MainAppDelegate 的实现:
import UIKit
class MainApp: UIApplication {
override func sendEvent(event: UIEvent) {
super.sendEvent(event)
}
}
class MainAppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(app: UIApplication, didFinishLaunchingWithOptions opt: [NSObject: AnyObject]?) -> Bool {
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
self.window!.rootViewController = UIViewController()
self.window!.backgroundColor = UIColor.whiteColor()
self.window!.makeKeyAndVisible()
self.window!.AddSubview {
let label = UILabel(frame: self.window!.frame)
label.textAlignment = .Center
label.text = "你好, UIKit!"
return label
}
return true
}
}
extension UIView {
func AddSubview(subview: ()->UIView) {
self.addSubview(subview())
}
}
运行效果:
Swift: 你好 UIKit.png
