//1.创建可变字符串，初始化为数组开头括号
    NSMutableString *OptionResult = [[NSMutableString alloc] initWithString:@"["];
    
    //2.for循环拼接字符串
    for (int i = 0; i < self.modelArray.count; i ++) {
        
        GreenVoteTableViewCellModel *cellModel = [self.modelArray objectAtIndex:i];
        
        if (cellModel.CStarScore == 1000) {
            TTAlert([NSString stringWithFormat:@"请选择第%d题星星",cellModel.VoteThemeID]);
            return;
        }
        if (cellModel.CVoteOptionID == 1000) {
            TTAlert([NSString stringWithFormat:@"第%d题单选不能为空",cellModel.VoteThemeID]);
            return;
        }
        
         NSString *string;
        
        if ([cellModel.Comment isEqualToString:@""]) {
            
            string = [NSString stringWithFormat:@"{\"VoteThemeID\":%d,\"VoteOptionID\":%d,\"StarScore\":%d},",cellModel.VoteThemeID,cellModel.CVoteOptionID,cellModel.CStarScore];
            
        } else {
            string = [NSString stringWithFormat:@"{\"VoteThemeID\":%d,\"VoteOptionID\":%d,\"StarScore\":%d,\"Comment\":\"%@\"},",cellModel.VoteThemeID,cellModel.CVoteOptionID,cellModel.CStarScore,cellModel.Comment];
        }
        
       
        [OptionResult appendString:string];
        
    }
    
    // 3. 获取末尾逗号所在位置
    NSUInteger location = [OptionResult length]-1;
    
    NSRange range = NSMakeRange(location, 1);
    
    // 4. 将末尾逗号换成结束的]}
    [OptionResult replaceCharactersInRange:range withString:@"]"];

//1. 初始化可变字符串，存放最终生成json字串
        NSMutableString *jsonString = [[NSMutableString alloc] initWithString:@"{\"actorhalls\":["];
         
        for(ExecplanActosHall *hall in actorhalls){
             
            //2. 遍历数组，取出键值对并按json格式存放
            NSString *string;
             
            string  = [NSString stringWithFormat:
                      @"{\"ownerName\":\"%@\",\"ownerId\":\"%@\",\"channelId\":\"%@\",\"ownerType\":\"%ld\"},",hall.ownerName,hall.ownerId,hall.channelId,(long)hall.ownerType];
             
            [jsonString appendString:string];
             
        }
        // 3. 获取末尾逗号所在位置
        NSUInteger location = [jsonString length]-1;
      
        NSRange range       = NSMakeRange(location, 1);
         
        // 4. 将末尾逗号换成结束的]}
        [jsonString replaceCharactersInRange:range withString:@"]}"];
 
        NSLog(@"jsonString = %@",jsonString);