OC中处理json解析出NSCFString

处理json解析出NSCFString

/*! 
* @brief 把格式化的JSON格式的字符串转换成字典 
* @param jsonString JSON格式的字符串 
* @return 返回字典 
*/ 
+ (NSDictionary *)dictionaryWithJsonString:(NSString *)jsonString { 
if (jsonString == nil) { 
return nil; 
} 
NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding]; 
NSError *err; 
NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData 
options:NSJSONReadingMutableContainers 
error:&;err]; 
if(err) { 
NSLog(@"json解析失败:%@",err); 
return nil; 
} 
return dic; 
} 

 注意

            NSDictionary * homeworkDic;
            if ([[dict valueForKeyPath:@"data.homework"] isKindOfClass:[NSDictionary class]]) {
                homeworkDic = [dict valueForKeyPath:@"data.homework"];
            }else {
                homeworkDic = [self dictionaryWithJsonString:[dict valueForKeyPath:@"data.homework"]];
            }