在創建項目的時候默認的是用storyboard的，但是有時我們需要添加引導頁，方法如下
在Applegate.m文件中
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSLog(@"%d",[[NSUserDefaults standardUserDefaults]boolForKey:@"firstLaunch"]);
if(![[NSUserDefaults standardUserDefaults]boolForKey:@"firstLaunch"])
{
[[NSUserDefaults standardUserDefaults]setBool:YES forKey:@"firstLaunch"];
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Storyboard" bundle:nil];
self.window.rootViewController = storyboard.instantiateInitialViewController;
}
else
{
UIStoryboard *story = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
self.window.rootViewController = story.instantiateInitialViewController;
}
// Override point for customization after application launch.
return YES;
}