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首先Xcode6  不允许新建空项目 所以

Xcode 6 正式版如何创建一个Empty Application

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• 更新：2015-07-10 11:22

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分步阅读

Xcode 6 正式版里面没有Empty Application这个模板，这对于习惯了纯代码编写UI界面的程序员来说很不习惯。

有网友给出了一个解决方法是，把Xcode 6 beta版里面的模板复制过去。

但是，如果性急的你已经把Xcode 6 beta彻底删除，网上又找不到Empty Application模板的下载，怎么办？总不用重新把几个G的Xcode 6 beta重新下一遍吧？

本文介绍在Xcode 6正式版，如何将一个Single View Application变为你熟悉的Empty Application。此方法对OC、Swift语言开发均适用。

工具/原料

• Xcode 6正式版

示例

1.  

   运行Xcode 6，创建一个Single View Application工程。

   
2.  

   创建好后，把工程目录下的Main.storyboard和LaunchScreen.xib删除，扔进废纸篓。

   
3.  

   打开Info.plist，把Launch screen interface file base name，以及Main storyboard file base name两项，删除（点击旁边的减号即可）。

   
4.  

   打开工程项目属性文件，点击Target下面的第一项，再选择General选项卡，向下找到Use Asset Catalog按钮。点击它。

   
5.  

   弹出对话框，点击Migrate即可。这样，应用尺寸就能根据屏幕大小进行调整了。

   
6.  

   最后，在AppDelegate的第一个方法里面，“return”语句之前，添加必要代码。

   代码只有3句，相当于分3步走。1.创建window；2.设置window背景；3.使window可见。

   OC和Swift的语法略有不同，但代码内容基本一致。

   //OC需要添加的代码

   self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

   self.window.backgroundColor = [UIColor whiteColor];

   [self.window makeKeyAndVisible];

   //Swift需要添加的代码

   self.window = UIWindow(frame: UIScreen.mainScreen().bounds)

   self.window?.backgroundColor = UIColor.whiteColor()

   self.window?.makeKeyAndVisible()

   

   然后 在appdelegate 写入代码

   //
   //  AppDelegate.m
   //  UITabBarcontroller
   //
   //  Created by YaguangZhu on 15/9/7.
   //  Copyright (c) 2015年 YaguangZhu. All rights reserved.
   //
   
   #import "AppDelegate.h"
   
   @interface AppDelegate ()
   
   @end
   
   @implementation AppDelegate
   
   
   - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
       // Override point for customization after application launch.
       self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
       self.window.backgroundColor = [UIColor whiteColor];
       [self.window makeKeyAndVisible];
       
       UITabBarController *tab = [[UITabBarController alloc] init];
       self.window.rootViewController = tab;
       
       UIViewController *vc1 = [[UIViewController alloc]init];
       vc1.view.backgroundColor = [UIColor redColor];
       vc1.tabBarItem.title=@"消息";
       vc1.tabBarItem.image = [UIImage imageNamed:@"vip"];
       
       UIViewController *vc2 = [[UIViewController alloc]init];
       vc2.view.backgroundColor = [UIColor blueColor];
       vc2.tabBarItem.title=@"联系人";
       vc2.tabBarItem.image = [UIImage imageNamed:@"vip"];
       
       
       UIViewController *vc3 = [[UIViewController alloc]init];
       vc3.view.backgroundColor = [UIColor greenColor];
       vc3.tabBarItem.title=@"动态";
       vc3.tabBarItem.image = [UIImage imageNamed:@"vip"];
       
       tab.viewControllers = @[vc1,vc2,vc3];
       return YES;
   }
   
   - (void)applicationWillResignActive:(UIApplication *)application {
       // 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.
       // 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.
   }
   
   - (void)applicationDidEnterBackground:(UIApplication *)application {
       // 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.
       // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
   }
   
   - (void)applicationWillEnterForeground:(UIApplication *)application {
       // 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.
   }
   
   - (void)applicationDidBecomeActive:(UIApplication *)application {
       // 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.
   }
   
   - (void)applicationWillTerminate:(UIApplication *)application {
       // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
   }
   
   @end