XCode空白工程,手工添加Storyboard步骤

XCode新建空白工程后,手工增加Storyboard并添加ViewController后,只显示空白,不显示ViewController:
调试时会提示:

Application windows are expected to have a root view controller at the end of application launch

这时,需要手工修改一处代码和一处配置:
1、AppDelegate源码文件

//修改前
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];

    return YES;
}

//修改后
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    return YES;
}

2、指定启动的Storyboard
在Project-》Targets-》Summary中修改Main Storyboard属性为新添加的Storyboard名称(不带后缀)。
或者
修改XXX-Info.plist文件,添加属性

<key>UIMainStoryboardFile</key>
<string>Storyboard名称(不带后缀)</string>

然后就OK啦。

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