iOS开发笔记-json转字典

+(NSDictionary*)stringToDic:(NSString *)jsonString{    NSLog(@"jsonString===%@",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;}