objective-c - NSArray 内的 NSDictionary

Question

我试图将 1 个字典的不同实例放入一个数组中。共享预期和当前输出。请建议一些东西提前致谢

Program.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);

}

当前输出:

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

预期输出:

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

Answer 1

您无法重复使用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];