简单进入启动界面或非启动界面

1.利用从特定的路径中取出字典的返回BOOL值来进行判断。

   //获取plist文件的地址，为空

   NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/d.plist"];

  //根据文件创建字典

    NSDictionary *dic = [NSDictionary dictionaryWithContentsOfFile:path];

 //取出字典的值，这里没有，为false

    BOOL isorNO = [[dic objectForKey:@"Nofiasrt"] boolValue];

    if(isorNO){

        ViewController *viewController = [[ViewController alloc] init];

        self.window.rootViewController = viewController;//非启动界面的进入

    }else{

       FViewController *viewController = [[FViewController alloc] init];

        self.window.rootViewController = viewController;//启动界面的进入

       //创建可变字典存入值为YES

        NSMutableDictionary *d = [NSMutableDictionary dictionary];

        [d setObject:@"YES" forKey:@"Nofiasrt"];

      //把字典放到路径中，方便运行时取出数据

        [d writeToFile:path atomically:YES];

    }