[NSCFString objectAtIndex：]：無法識別選擇使用nsmutabledictionery

Question

NSDateFormatter *formatter; 
    NSString *dateString; 
    formatter = [[NSDateFormatter alloc] init]; 
    [formatter setDateFormat:@"dd-MM-yyyy HH:mm a"]; 
    dateString = [formatter stringFromDate:[NSDate date]]; 
    [formatter release]; 

    appDelegate.myCallLogDict = [[NSMutableDictionary alloc]init]; 
    [appDelegate.myCallLogDict setObject:phoneNo forKey:@"CallLogPhoneNoKey"]; 
    [appDelegate.myCallLogDict setObject:dateString forKey:@"CallLogTimeStampKey"]; 

我已存儲的電話沒有時間到nsmutabledictionery時發送到實例，我想訪問dictionery值作爲像下面進入 -

(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath method 

cell.detailTextLabel.text = [[appDelegate.myCallLogDict objectForKey:@"CallLogTimeStampKey" ]objectAtIndex:row]; 
cell.textLabel.text = [[appDelegate.myCallLogDict objectForKey:@"CallLogPhoneNoKey"] objectAtIndex:row]; 

當我運行上面的代碼，我得到下面的錯誤

請幫我

-[NSCFString objectAtIndex:]: unrecognized selector sent to instance 0x5b227e0 
2011-12-15 10:06:09.050 MyDialer[1090:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSCFString objectAtIndex:]: unrecognized selector sent to instance 0x5b227e0' 

非常感謝您的幫助

Answer 1

我想你必須將你的密鑰數據保存在一個數組中，然後在該數組上使用objectAtIndex。

Answer 2

您期待您的字典包含關鍵字CallLogTimeStampKey的字符串數組，但您只插入了一個字符串。

Answer 3

試試這個：

cell.detailTextLabel.text = [appDelegate.myCallLogDict objectForKey:@"CallLogTimeStampKey"]; 
cell.textLabel.text = [appDelegate.myCallLogDict objectForKey:@"CallLogPhoneNoKey"]; 

你不需要通過

[appDelegate.myCallLogDict objectForKey:@"CallLogPhoneNoKey"]; 

Answer 4

使用objectAtIndex爲你所得到的單串在我的情況有以下問題：

1. 有一個屬性@property (nonatomic, retain) NSIndexPath *selectedCell;
2. 其中synthezid ED作爲@synthesize selectedCell = _selectedCell;

3. 與吸氣

   • （NSIndexPath *）selectedCell { 如果{ _selectedCell = [NSIndexPath indexPathForRow：self.selectedImageNumber切入口：kTexturesListSection]（_selectedCell！）; } return _selectedCell; }

4. ，然後在代碼中的一些在呼叫self.selectedCell.row造成死機

吸氣已被更改爲

• （NSIndexPath *）後selectedCell 如果（！_selectedCell）{ _selectedCell = [[NSIndexPath indexPathForRow：self.selectedImageNumber inSection：kTexturesListSection] retain]; [0124] } return _selectedCell; }

一個錯誤消失了。該錯誤僅在iOS 5上有所體現。