54.NSJSONSerialization类进行json解析(字符串“UTF-8解码”)

NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingAllowFragments error:nil] ;

方法：解析并转码

- (NSString*)dataToJsonString:(id)object {

NSString *jsonString = nil;

NSError *error;

NSData *jsonData = [NSJSONSerialization dataWithJSONObject:object

options:NSJSONWritingPrettyPrinted // 不关心生成字符串的可读性，则传递0。

error:&error];

if (! jsonData) {

NSLog(@"这是error: %@", error);

} else {

jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

}

return jsonString;

}