ios - 用 for 循环填充 NSMutableDictionary，然后它会显示最后加载的值

Question

你好，我曾尝试使用 for 循环用两个 NSMutableArray 数据填充 NSMutableDictionary，当循环结束时，NSMutableDictionary 只显示最后加载的值，有什么问题吗？按照代码

 -(void)calculateDistance
{
    self.distanceArray=[[NSMutableArray alloc]init];
    self.dict=[[NSMutableDictionary alloc]init];



    for (int i=0; i<[self.nombre count]; i++) {


       CLLocation *shopPosition=[[CLLocation alloc]initWithLatitude:[[self.latitud objectAtIndex:i] floatValue]longitude:[[self.longitud objectAtIndex:i]floatValue]];
        self.userPosition=[[CLLocation alloc]initWithLatitude:self.currentLat longitude:self.currentLong];

        self.distance=[shopPosition distanceFromLocation:self.userPosition];

       [self.distanceArray addObject:[NSNumber numberWithFloat:self.distance]];

        [self.dict setObject:[self.distanceArray objectAtIndex:i] forKey:@"distance"];
        [self.dict setObject:[self.nombre objectAtIndex:i]  forKey:@"nombre"];


   }

    NSLog(@" DICT %@",self.dict);

非常感谢

Answer 1

您始终将新值设置为相同的键:

[self.dict setObject:[self.distanceArray objectAtIndex:i] forKey:@"distance"];
[self.dict setObject:[self.nombre objectAtIndex:i]  forKey:@"nombre"];

您应该改为使用 NSMutableArray 并在每个循环周期添加一个新的 NSDictionary。

    NSDictionary *dict = @{@"distance" : self.distanceArray[i],
                           @"nombre"   : self.nombre[i]
   };

    [self.newMutArray addObject: dict];