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 {
}
