iOS JSON Parse不工作(返回null字典) [英] iOS JSON Parse not working (returns null dictionary)
问题描述
我使用 NSJSONSerialization
的 JSONObjectWithData:数据选项:错误:
来解析从服务器返回的JSON数据。
I use the NSJSONSerialization
's JSONObjectWithData:data options: error:
to parse JSON data returned from a server.
现在我使用的options参数: NSJSONReadingAllowFragments
。你可以看下面看到实际的JSON(我相信问题所在)。
Now for the options parameter I use: NSJSONReadingAllowFragments
. You can look below and see the actual JSON (where I believe the problem is).
我得到的错误信息是:
Error Domain = NSCocoaErrorDomain Code = 3840操作无法完成。(Cocoa error 3840.)(字符0周围的值无效。)UserInfo = 0x6895da0 {NSDebugDescription =字符0周围的值无效。}
Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (Invalid value around character 0.) UserInfo=0x6895da0 {NSDebugDescription=Invalid value around character 0.}
任何想法如何解决?
JSON =
{"name":"Johan Appleseed",
"email":"j.appleseed@emuze.co",
"phone":"+4121876003",
"accounts":{
"facebook":[true,1125],
"twitter":[false,null],
"homepage":[true,"http:\/\/johnAplleseed.com\/index.html"]}}
推荐答案
可能你有一些你看不到的不可打印的角色。试试这个:
Probably you have some unprintable character that you cannot see. Try this:
NSData *jsonData = ...
const unsigned char *ptr = [data bytes];
for(int i=0; i<[data length]; ++i) {
unsigned char c = *ptr++;
NSLog(@"char=%c hex=%x", c, c);
}
验证您在开头或结尾没有不可打印的字符数据。
To verify you don't have unprintable characters at the beginning or end of the data.
编辑:澄清一下,只需在你的JSON字典上运行上面的代码 - 那个无法解析的字典。
to clarify, just run the above on your JSON dictionary - the one that fails to parse.
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