Question

我试图在特定索引

上将NSMutableDictionary添加到NSMutableArray中

NSMutableArray已填充数据来自webservice，但我想要

在我的数组中在0索引上添加另一个字典。

但我有点困在这里：

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: ' -[JKArray insertObject:atIndex:]: mutating method sent to immutable object'

我的代码是：

on .h file

@property (strong, nonatomic)NSMutableArray *cityArray;

@property (strong, nonatomic)NSMutableDictionary *cityDict;

.m file:

- (void)viewDidLoad
{
    [super viewDidLoad];


    self.cityArray = [[NSMutableArray alloc]init];

self.cityDict  = [[NSMutableDictionary alloc]initWithObjectsAndKeys:@"All Cities",@"key1", nil];

    NSLog(@"City Dict=> %@", cityDict);
}


-(void)ConnectionDidFinishLoading:(NSString *)responseString :(NSString *)serviceName{

        self.dealsDict = [responseString objectFromJSONString];

        self.cityArray = [self.dealsDict objectForKey:@"Cities"];

        [self.cityArray addObject:[self.cityDict copy]];

        [self.cityArray addObject:self.cityDict];

        [self.cityArray objectAtIndex:0];

        [self.tableView reloadData];

}

请帮助

感谢。

Answer 1

您应该尝试使用arrayWithObjects。你没有走上正确的轨道。我无法理解[self.cityArray objectAtIndex:0];

的用法

试试这个：

 NSDictionary *dict = [[NSDictionary alloc] init];
 NSMutableArray *cities = [[NSMutableArray alloc] initWithArray:[dict objectForKey:@"cities"]];

我希望这会有所帮助。

Answer 2

如果您的cityArray已有对象，请尝试以下操作：

[cityArray insertObject:[self.dealsDict objectForKey:@"Cities"] atIndex:0];

但是你的cityArray is为空，请尝试以下方法：

[cityArray addObject:[self.dealsDict objectForKey:@"Cities"]]

在特定索引处将NSMutableDictionary添加到NSMutableArray？

2 个答案: