#import "AppDelegate.h" @implementation AppDelegate - (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]; //增加标识,用于判断是否是第一次启动应用... if (![[NSUserDefaults standardUserDefaults] boolForKey:@"everLaunched"]) { [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"everLaunched"]; [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"firstLaunch"]; } if ([[NSUserDefaults standardUserDefaults] boolForKey:@"firstLaunch"]) { ViewController *appStartController = [[ViewController alloc] init]; self.window.rootViewController = appStartController; }else { //NextViewController *mainViewController = [[NextViewController alloc] init]; //self.window.rootViewController=mainViewController; } [self.window makeKeyAndVisible]; return YES; }