objc NSMutableDictionary 存取字

NSMutableDictionary *d = [NSMutableDictionary dictionary];
    
    
    [d setObject:@"qingjoin" forKey:@"serveraddr"];
    [d setObject:@"pwdpwd" forKey:@"userpwd"];
    NSLog(@"%@",d);
    //新建一个对象。
    id ontest = [d objectForKey:@"serveraddr"];
    id sectest = [d objectForKey:@"userpwd"];
    NSLog(@"%@",ontest);
    NSLog(@"%@",sectest); 

    结果：
    serveraddr = qingjoin;
    userpwd = pwdpwd;

    qingjoin
    pwdpwd