iPhone应用程序崩溃[__NSCFString objectForKey：]无法识别的选择器发送到实例 [英] iPhone app crash [__NSCFString objectForKey:] unrecognized selector sent to instance

问题描述

我试图在tempArray中添加偶数个data.localBookmarks是字典数组。这是我的代码：

I am trying to add in tempArray only even number of data.localBookmarks is array of dictionary. Here is my code :

currentIndex = indexPath.row;
for (NSDictionary *dict in localBookmarks)
    {
    if (currentIndex % 2 == 0 && currentIndex <= [localBookmarks count])
     {             
           [tempArray addObject:[dict objectForKey:@"firstName"]];
     }
        currentIndex++;
    }
NSLog(@"tempArray %@",tempArray);

cell.textLabel.text = [tempArray objectAtIndex:indexPath.row];
return cell;

我的应用程序崩溃[tempArray addObject：[dict objectForKey：@firstName]];这一行，我该如何解决？

my app crash on [tempArray addObject:[dict objectForKey:@"firstName"]]; this line ,How can I fix it?

推荐答案

为什么会崩溃

您认为是NSDictionary的变量 dict 实际上是一个NSString。由于字符串不响应 objectForKey：方法，因此您的应用程序崩溃了。这就是错误消息告诉你的。

Why you are crashing

The variable dict that you think is a NSDictionary is actually a NSString. Since strings don't respond to the objectForKey: method your app crashed. That is what the error message is telling you.

你的陈述：数据。 localBookmarks是字典数组是假的。其中至少有一个只是一个字符串。

Your statement: "data.localBookmarks is array of dictionary" is false. At least one of them is just a string.

检查 localBookmarks 的来源。如果您正在解析它的数据，则可能需要更改它。

Check where your localBookmarks comes from. If it's data you are parsing you may need to change that.

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