我正在使用 Bing Search API 并且能够成功解析 xml 但不是 JSON。下面是解析 xml 和 JSON 的代码，当我 nslog 输出 JSON 时它显示“null”我不知道如何从这里。
-(void)searchBing:(NSString *)text{
//NSString *query1 = @"San Francisco Baseball";
NSString *query = [NSString stringWithFormat: @"'%@'",text];
//NSString *query = query1;
NSString *format = @"atom";
NSString *market = @"'en-us'";
//NSInteger top = 2;
NSMutableString *fullURL = [NSMutableString stringWithCapacity:256];
[fullURL appendString:URL];
[fullURL appendFormat:@"Web?$format=%@", format];
[fullURL appendFormat:@"&Query=%@",
[query stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
[fullURL appendFormat:@"&Market=%@",
[market stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
// [fullURL appendFormat:@"&$top=%d", top];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:
[self getRequest:fullURL] delegate:self];
if (connection)
{
NSLog(@"Connection established");
}
else
{
NSLog(@"Connection failed");
}
}
下面是解析xml（成功）和JSON（不成功）的地方
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
// The request is complete and data has been received
// You can parse the stuff in your instance variable now
// convert to JSON
NSLog(@"Finished loading: Received %d bytes of data",[self.responseData length]);
NSXMLParser *parser = [[NSXMLParser alloc] initWithData: self.responseData];
[parser setDelegate: self];
[parser parse];
NSLog(@"XMl == %@",parser);
NSError *myError = nil;
NSDictionary *res = [NSJSONSerialization JSONObjectWithData:self.responseData options:kNilOptions error:&myError];
NSLog(@"json data = %@",res);//getting null
}
我正在使用 Base_64 编码，对于所有查看者来说，查询没有任何问题，因为通过 xml 解析器获取正确的信息。但我想要JSON中的响应。
结构样本
{
"SearchResponse":{
"Version":"2.2",
"Query":{
"SearchTerms":"testign"
},
"Spell":{
"Total":1,
"Results":[
{
"Value":"testing"
}
]
},
"Web":{
"Total":5100,
"Offset":0,
"Results":[
{
"Title":"Testign part 2 - Tiernan OTooles Programming Blog",
"Description":"If this works, it means nothing really, but i have managed to build a .TEXT blog posting app. could be handy if i move my main blog to .TEXT, which i am thinking about..",
"Url":"http:\/\/weblogs.asp.net\/tiernanotoole\/archive\/2004\/09\/24\/233830.aspx",
"DisplayUrl":"http:\/\/weblogs.asp.net\/tiernanotoole\/archive\/2004\/09\/24\/233830.aspx",
"DateTime":"2008-10-21T05:08:05Z"
}
]
}
}
}