objective-c - 在特定索引处将 NSMutableDictionary 添加到 NSMutableArray？

Question

我正在尝试将 NSMutableDictionary 添加到特定索引上的 NSMutableArray 中

NSMutableArray 已经填充数据来自网络服务，但我想要

在我的数组中的 0 索引上添加另一个字典。

但我有点卡在这里:

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];

}

请帮忙

谢谢。

Answer 1

您应该尝试使用 arrayWithObjects。你没有走在正确的轨道上。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"]];

希望对您有所帮助。