appDelegate

/*

判断是不是第一次运行项目，如果是，显示引导页，不是，直接进入程序

*/

if (![[NSUserDefaults standardUserDefaults] objectForKey:@"hasNew"] || ![[[NSUserDefaults standardUserDefaults] objectForKey:@"hasNew"] boolValue]) {

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

if (![defaults objectForKey:@"intro_screen_viewed"]) {

self.abcVC = [[ABCViewController alloc] init];

self.window.rootViewController = self.abcVC;

}

[[NSUserDefaults standardUserDefaults] setObject:@(YES) forKey:@"hasNew"];

} else {

}