ios - 将数据添加到另一个 NSDictionary 中的 NSDictionary

Question

我正在尝试将数据添加到嵌套在其他词典中的 NSMutableDictionary。

在添加数据的代码运行之前开始输出

DayData Dictionary {            //DayData Dictionary

Monday =     {                  //events Dictionary
    trip1 =         {           //eventData Dictionary
        numItems = 9items;
        time = "5:00";
        tripName = beachfucking;
    };
};
Thursday =     {
    trip1 =         {
        numItems = 9items;
        time = "5:00";
        tripName = beachfucking;
    };
};
Tuesday =     {
    trip1 =         {
        numItems = 9items;
        time = "5:00";
        tripName = beachfucking;
    };
};
Wendsday =     {
    trip1 =         {
        numItems = 9items;
        time = "5:00";
        tripName = beachfucking;
    };
};
}

生成此输出的代码

NSMutableDictionary *eventData = [[NSMutableDictionary alloc]initWithObjects:@[@"5:00",@"9items",@"beachfucking"] forKeys:@[@"time",@"numItems",@"tripName"]];

NSMutableDictionary *event = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                              eventData,@"trip1",nil];

NSMutableDictionary *dayData = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                        event,@"Monday",event,@"Tuesday",
                                        event,@"Wendsday",event,@"Thursday",nil];

我目前正在尝试解决这个问题。在这里，我创建了一个新事件 NSDictionary，然后将该数据添加到 DayData 字典中。但是输出不正确。一周中的每一天都得到一个“trip2”数据集，而星期一只是假设。

 NSMutableDictionary *event2 = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                              eventData,@"trip2",nil];
[[dayData objectForKey:@"Monday"] addEntriesFromDictionary:event2];

上面代码的当前错误输出

2016-12-24 01:56:41.261329 test1[10098:380349] {
    Monday =     {
        trip1 =         {
            numItems = 9items;
            time = "5:00";
            tripName = beachfucking;
        };
        trip2 =         {
            numItems = 9items;
            time = "5:00";
            tripName = beachfucking;
        };
    };
    Thursday =     {
        trip1 =         {
            numItems = 9items;
            time = "5:00";
            tripName = beachfucking;
        };
        trip2 =         {
            numItems = 9items;
            time = "5:00";
            tripName = beachfucking;
        };
    };
    Tuesday =     {
        trip1 =         {
            numItems = 9items;
            time = "5:00";
            tripName = beachfucking;
        };
        trip2 =         {
            numItems = 9items;
            time = "5:00";
            tripName = beachfucking;
        };
    };
    Wendsday =     {
        trip1 =         {
            numItems = 9items;
            time = "5:00";
            tripName = beachfucking;
        };
        trip2 =         {
            numItems = 9items;
            time = "5:00";
            tripName = beachfucking;
        };
    };
    }

注意 trip2 是如何为一周中的所有天填写的。

Answer 1

您所有的天键都包含相同的引用对象事件，因此更改其中之一，将反射(reflect)到所有天的键。

要解决这个问题，请像这样声明您的 dayData Dictionary。

NSMutableDictionary *dayData = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                [event mutableCopy] ,@"Monday",[event mutableCopy],@"Tuesday",
                                [event mutableCopy],@"Wendsday",[event mutableCopy],@"Thursday",nil];