我有以下代码试图解析我从网站返回的 JSON:
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
[connection release];
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
NSLog(@"my ns string = %@", responseString);
[responseData release];
NSError *error;
NSDictionary *dictionary = [parser objectWithString:responseString
error:&error];
while (error) {
NSLog(@"%@", error);
error = [[error userInfo] objectForKey:NSUnderlyingErrorKey];
}
NSLog(@"%@", dictionary);
}
我收到这些错误:
2011-08-01 20:16:47.273 myJSONParser[1040:b603] Connection didReceiveResponse:
<NSHTTPURLResponse: 0x4e810f0> - application/json
2011-08-01 20:16:47.279 myJSONParser[1040:b603] Connection didReceiveData of length: 117
2011-08-01 20:16:47.359 myJSONParser[1040:b603] my ns string =
2011-08-01 20:16:47.361 myJSONParser[1040:b603] Error Domain=org.brautaset.SBJsonParser.ErrorDomain Code=0 "Unexpected end of input" UserInfo=0x4eada30 {NSLocalizedDescription=Unexpected end of input}
2011-08-01 20:16:47.363 myJSONParser[1040:b603] (null)
我确实可以控制我正在尝试获取的 JSON,并且在生成 JSON 的 PHP 内部我将标头设置如下:
header("Content-Type:application/json");
...
echo json_encode($arr);
“输入意外结束”让我相信 JSON 格式不正确,但 JSONLint 告诉我它完全有效。我究竟做错了什么?感谢您抽出宝贵时间阅读本文,任何建议将不胜感激!
更新:
我这样设置responseData:
NSMutableData *responseData;
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
NSLog(@"Connection didReceiveData of length: %u", data.length);
[responseData appendData:data];
}
像这样的解析器(在.h中):
SBJsonParser *parser;
和.m:
parser = [[SBJsonParser alloc] init];
查尔斯发现:
HTTP/1.1 200 OK
Date: Tue, 02 Aug 2011 03:30:14 GMT
Server: Apache
X-Powered-By: PHP/5.2.15
Transfer-Encoding: chunked
Content-Type: application/json
[{"key1":"Name","key2":"First","key3":"2011-08-13"},{"key1":"Second","key2":"test2","key3":"2011-08-13"}]
收到的 NSData 说明:
打印数据描述:{length = 117, capacity = 256, bytes = 0x5b7b22686f6d65223a22426c61636b62 ... 30382d3133227d5d}