- [__ NSCFDictionary objectAtIndex:]:

Question

救命!我已经用这个问题把头发拉了1个小时了.

我正在我的.h文件中创建一个数组

    @interface LeftMenuViewController : UIViewController <UITableViewDataSource, UITabBarControllerDelegate>

@property (strong, nonatomic) MKNetworkOperation *myNetworkOperation;
@property (strong, nonatomic) NSArray *listOfClubsArray;

@end

然后我从JSON中的API调用中提取项目列表

///////////////////////////////////////////
#pragma mark Retreive List of Clubs / Teams
///////////////////////////////////////////

- (void)getListOfClubs {

    // Because we have a success from login auth we will now make a seperate call to gather club details

    self.myNetworkOperation = [app.teamManagerWrapper deviceID:@"adam" userToken:@"sdfdfgf" onCompletion:^(NSDictionary *result) {

        NSDictionary *data2 = [result objectForKey:@"data"];

        self.listOfClubsArray = [data2 objectForKey:@"user_clubs"];

        [self.tableView reloadData];

    } onError:^(NSError *error) {

        // error none

    }];

JSON看起来像这样

{
    "code": 200,
    "data": {
        "user_clubs": {
            "5238": {
                "club_id": "45484",
                "name": "Testing This Club Name",
                "sport_id": "7",
                "primary_colour": "#000000",
                "secondary_colour": "#f15729",
                "members": null,
                "sections": {
                    "s": "Mens",
                    "j": "Junior",
                    "m": "Summer League",
                    "l": "Ladies"
                }

我的tablecell看起来像这样

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"ClubCell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell==nil) {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
    }

    NSDictionary *tempDictionary= [self.listOfClubsArray objectAtIndex:indexPath.row];

    cell.textLabel.text = [tempDictionary objectForKey:@"name"];

    return cell;
}

它在这条线上崩溃了

NSDictionary *tempDictionary= [self.listOfClubsArray objectAtIndex:indexPath.row];

有了这个崩溃日志

2013-11-19 12:13:43.069 Manager App[11394:70b] -[__NSCFDictionary objectAtIndex:]: unrecognized selector sent to instance 0x8b0e9d0
2013-11-19 12:13:43.071 Manager App[11394:70b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFDictionary objectAtIndex:]: unrecognized selector sent to instance 0x8b0e9d0'
*** First throw call stack:

任何帮助非常感谢!!

Answer 1

在你的JSON示例中,没有俱乐部数组而是字典,因此objectAtIndex不起作用.

{
    "code": 200,
    "data": {
        "user_clubs": {
            "5238": {
            "club_id": "45484",
            "name": "Testing This Club Name",

在这里你可以看到data/user_clubs拥有一个dictionanry,如果你想让Testing This Club Name你用它来获取它:

 NSDictionary *tempDictionary= [self.listOfClubsArray objectForKey:@"5238"];

现在这不是你想要的,解决方案可能是这样的:

NSArray *keys = [self.listOfClubsArray allKeys];
NSString *key = [keys objectAtIndex:indexPath.row];
NSDictionary *tempDictionary= [self.listOfClubsArray objectForKey:key];

但请确保您还要通过UITableView来更正密钥数量并进行更改

@property (strong, nonatomic) NSArray *listOfClubsArray;

至

@property (strong, nonatomic) NSDictionary *listOfClubsArray;