当我知道值为1时，ObjectForKey总是返回null或0 [英] ObjectForKey always returning null or 0 when I know the value to be 1

问题描述

我已致电

self.permissionRequest = [facebook requestWithGraphPath:@"me/permissions" andDelegate:self];

(我设置了FBRequest对象，以便可以在委托方法中标识它)

(I set the FBRequest object so I can identify it in the delegate method)

我在代表中打电话给

        if (request == self.permissionRequest) {
        DLog(@"Result: %@", result);

    }

从活动权限中我可以得到很好的打印结果:

And I get a nice print out of active permissions:

结果:{ 数据=( { 已加书签= 1； "create_note" = 1; 电子邮件= 1; 已安装= 1； "photo_upload" = 1; "publish_stream" = 1; "share_item" = 1; "status_update" = 1; "video_upload" = 1; } ); }

Result: { data = ( { bookmarked = 1; "create_note" = 1; email = 1; installed = 1; "photo_upload" = 1; "publish_stream" = 1; "share_item" = 1; "status_update" = 1; "video_upload" = 1; } ); }

到目前为止一切顺利.

All well so far.

但是我只想确定"publish_stream"是打开还是关闭.

BUT I just want to determine if the "publish_stream" is on or off.

如果我打电话

id *key = [result objectForKey:@"publish_stream"];
int keyInt = [key integerValue];
DLog(@"Key: %i", keyInt);

我总是得到0.

如果我打电话

NSString *key = [result objectForKey:@"publish_stream"];
    DLog(@"Key: %@", key);

我得到"null".

I get 'null'.

我做错了什么?为什么无法获取publish_stream键的值?我也尝试过使用valueForKey:具有相同的结果.

What am I doing wrong?? Why can't I get the value of the publish_stream key? I've also tried using valueForKey: with the same results.

必须有一个非常简单的解决方案吗?

There must be a remarkably simple solution?

推荐答案

我认为您的结果字典只有一个键data，其值是另一本字典，而其他所有内容都在其中.

I think your result dictionary has just one key, data, whose value is another dictionary, and everything else is inside that.

尝试

[[result objectForKey:@"data"] objectForKey:@"publish_stream"];

您还有另一个错误:您写了

You also have another error: you wrote

id *key

id已经是一个指针.除非您要使用双指针，否则不应在其后放置*.

An id is already a pointer. You shouldn't put a * after it unless you want a double pointer.

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