Objective c NSArray内的词典

我试图将1字典的不同实例放入一个数组中。共享预期和当前输出。请提出一些建议 提前谢谢

程序.h

@property (nonatomic,strong)NSMutableArray* array;

Program.m

-- (void)StartFuntion
 {
_array = [[NSMutableArray alloc] init];
NSMutableDictionary* dicOne = [[NSMutableDictionary alloc] init];

[dicOne setObject:@"A" forKey:@"1"];        //Adding new
[dicOne setObject:@"B" forKey:@"2"];
[dicOne setObject:@"C" forKey:@"3"];
[dicOne setObject:@"D" forKey:@"4"];
[self addob:dicOne];                       //sending dicOne to funtion 

[dicOne removeAllObjects];              //Remove objects

[dicOne setObject:@"X" forKey:@"100"];      //Again Adding new objects
[dicOne setObject:@"Y" forKey:@"200"];
[dicOne setObject:@"Z" forKey:@"300"];
[dicOne setObject:@"W" forKey:@"400"];
[self addob:dicOne];
}


-- (void) addob:(NSMutableDictionary*)dic{

[_array addObject:dic];
NSLog(@"_array = %@",_array);

}

电流输出：

  _array = (
         {
    100 = X;
    200 = Y;
    300 = Z;
    400 = W;
},
    {
    100 = X;
    200 = Y;
    300 = Z;
    400 = W;
}
    )

  _array = (
     {
    1 = A;
    2 = B;
    3 = C;
    4 = D;
},
    {
    100 = X;
    200 = Y;
    300 = Z;
    400 = W;
  }
      )

预期输出：

  _array = (
         {
    100 = X;
    200 = Y;
    300 = Z;
    400 = W;
},
    {
    100 = X;
    200 = Y;
    300 = Z;
    400 = W;
}
    )

  _array = (
     {
    1 = A;
    2 = B;
    3 = C;
    4 = D;
},
    {
    100 = X;
    200 = Y;
    300 = Z;
    400 = W;
  }
      )

---

您正在重用

NSMutableDictionary

，而不是创建新实例。做点像这样的事吧

[_array addObject:@{
                    @"1" : @"A",
                    @"2" : @"B",
                    @"3" : @"C",
                    @"4" : @"D",
                   }];

[_array addObject:@{
                    @"100" : @"X",
                    @"200" : @"Y",
                    @"300" : @"Z",
                    @"400" : @"W",
                   }];

---

您正在重用

NSMutableDictionary

，而不是创建新实例。做点像这样的事吧

[_array addObject:@{
                    @"1" : @"A",
                    @"2" : @"B",
                    @"3" : @"C",
                    @"4" : @"D",
                   }];

[_array addObject:@{
                    @"100" : @"X",
                    @"200" : @"Y",
                    @"300" : @"Z",
                    @"400" : @"W",
                   }];

---

您不能重复使用

dicOne

。创建一个新实例，而不是删除其对象

_array = [[NSMutableArray alloc] init];
NSMutableDictionary* dicOne = [[NSMutableDictionary alloc] init];

[dicOne setObject:@"A" forKey:@"1"];        //Adding new
[dicOne setObject:@"B" forKey:@"2"];
[dicOne setObject:@"C" forKey:@"3"];
[dicOne setObject:@"D" forKey:@"4"];
[self addob:dicOne];                       //sending dicOne to funtion 

dicOne = [[NSMutableDictionary alloc] init];

[dicOne setObject:@"X" forKey:@"100"];      //Again Adding new objects
[dicOne setObject:@"Y" forKey:@"200"];
[dicOne setObject:@"Z" forKey:@"300"];
[dicOne setObject:@"W" forKey:@"400"];
[self addob:dicOne];

---

您不能重复使用

dicOne

。创建一个新实例，而不是删除其对象

_array = [[NSMutableArray alloc] init];
NSMutableDictionary* dicOne = [[NSMutableDictionary alloc] init];

[dicOne setObject:@"A" forKey:@"1"];        //Adding new
[dicOne setObject:@"B" forKey:@"2"];
[dicOne setObject:@"C" forKey:@"3"];
[dicOne setObject:@"D" forKey:@"4"];
[self addob:dicOne];                       //sending dicOne to funtion 

dicOne = [[NSMutableDictionary alloc] init];

[dicOne setObject:@"X" forKey:@"100"];      //Again Adding new objects
[dicOne setObject:@"Y" forKey:@"200"];
[dicOne setObject:@"Z" forKey:@"300"];
[dicOne setObject:@"W" forKey:@"400"];
[self addob:dicOne];

---

您可以这样做：

NSMutableArray array = [[NSMutableArray alloc] init];
[array addObject:dict1];
[array addObject:dict2];

---

您可以这样做：

NSMutableArray array = [[NSMutableArray alloc] init];
[array addObject:dict1];
[array addObject:dict2];

---

当然可以，但在将dic插入阵列之前，必须先复制一份dic

-- (void) addob:(NSMutableDictionary*)dic{
[_array addObject:[dic copy]];
NSLog(@"_array = %@",_array);
}

如果您想在数组中使用可变dic，请使用[dic mutableCopy]。

---

您也可以在调用addob:时进行复制，而不是在方法中进行复制。

当然可以，但您必须在将dic插入数组之前进行复制

-- (void) addob:(NSMutableDictionary*)dic{
[_array addObject:[dic copy]];
NSLog(@"_array = %@",_array);
}

如果您想在数组中使用可变dic，请使用[dic mutableCopy]。

---

您也可以在调用addob:时进行复制，而不是在方法中进行复制。

FYI-与OP的代码相比，您的键和值是向后的。刚刚意识到这一点。没有人喜欢

[setValue:forKey:

是有原因的，因为

[setObject:forKey:

更好。是的，是的。不管怎样PFYI-与OP的代码相比，您的键和值是向后的。刚刚意识到这一点。没有人喜欢

[setValue:forKey:

是有原因的，因为

[setObject:forKey:

更好。是的，是的。不管怎样P