iOS:Swift介面執行個體1, 簡單介面

標籤：style   class   blog   code   tar   ext   

Apple推出了基於Objective-C的新語言Swift. 通過執行個體, 我們可以很好的感受這門新語言

注意事項: 在XCode6_Beta中, 如果有中文, IDE的自動補全功能就會失效, 所以開始調試的時候可以先用英文, 後面再用中文替代.

1. 建立iOS -> Single View Application.

2. 修改AppDelegate.swift檔案

 1 // 2 //  AppDelegate.swift 3 //  UIByCode_Swift_1_HelloWorld 4 // 5 //  Created by yao_yu on 14-6-18. 6 //  Copyright (c) 2014 yao_yu. All rights reserved. 7 // 8  9 import UIKit10 11 @UIApplicationMain12 class AppDelegate: UIResponder, UIApplicationDelegate {13                             14     var window: UIWindow?15 16 17     func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {18         self.window = UIWindow(frame: UIScreen.mainScreen().bounds)19         // Override point for customization after application launch.20         let window = self.window!21         window.backgroundColor = UIColor.whiteColor()22         window.makeKeyAndVisible()23         24         let frame = UIScreen.mainScreen().bounds25         let EDGE:CGFloat = 2026         27         var labelHello = UILabel(frame: CGRectMake(EDGE, (frame.height - EDGE)/2, frame.width - EDGE * 2, EDGE))28         labelHello.textAlignment = NSTextAlignment.Center29         labelHello.text = "你好,歡迎來到swift世界!"     //加入中文後,XCode的自動補全功能就不出來了30         window.addSubview(labelHello)31         32         return true33     }34 35     func applicationWillResignActive(application: UIApplication) {36         // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.37         // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.38     }39 40     func applicationDidEnterBackground(application: UIApplication) {41         // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.42         // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.43     }44 45     func applicationWillEnterForeground(application: UIApplication) {46         // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.47     }48 49     func applicationDidBecomeActive(application: UIApplication) {50         // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.51     }52 53     func applicationWillTerminate(application: UIApplication) {54         // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.55     }56 57 58 }

3.運行