如何从以下示例中的NSSArray元素获取值？

Question

我有一个NSArray所以当我这样做时：

NSLog(@"%@", [jokesArray description]);

我得到以下内容：

(
        {
        "_id" =         {
            "$id" = 4e91fd49c7e24cda74000000;
        };
        author = draper;
        comments =         (
                        {
                author = adias;
                comment = "amazing again";
            }
        );
        created =         {
            sec = 1318118400;
            usec = 0;
        };
        text = "This is a random post again";
        title = "post # 2";
        type =         (
            punjabi
        );
    },
        {
        "_id" =         {
            "$id" = 4e8cf1d6c7e24c063e000000;
        };
        author = faisal;
        comments =         (
                        {
                author = adias;
                comment = amazing;
            },
                        {
                author = nike;
                comment = "I concur";
            }
        );
        created =         {
            sec = 1317772800;
            usec = 0;
        };
        text = "This is a random post";
        title = "post # 1";
        type =         (
            punjabi
        );
    }
)

如何访问特定元素中的文本键？

我尝试时收到错误：

[[cell textLabel]setText:[[jokesArray objectAtIndex:[indexPath row]]valueForKey:@"text"]]; 

Answer 1

EXC_BAD_ACCESS表示您正在提供错误的指针。也许你未能妥善保留jokesArray？

Answer 2

暂停NSLog语句。运行您的应用程序，然后使用调试器不断向jokesarray添加图层。例如，当您点击断点时，进入调试器，然后键入

po jokesArray 

如果显示正确，请输入：

po [jokesArray objectAtIndex:[indexPath row]]

如果有效，请输入您的全部内容：

po [[jokesArray objectAtIndex:[indexPath row]]valueForKey:@"text"]]

如果可以，那么你的问题不在于访问jokesArray。