自定义cell

- (UITableViewCell *)tableView:(UITableView *)tableView
         cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    // 为其定义一个标识符，在重用机制中，标识符非常重要，这是系统用来匹配table各行cell的判断标准，在以后的学习中会体会到
    static NSString *identifier = @"identifier";
    
    // 从缓存队列中取出复用的cell(重用队列中取出cell)
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];

#pragma mark -- 自定义cell
    UILabel *carriers; //运营商
    UILabel *telPhone; //电话号码
    UILabel *time; //通话时间
    UILabel *date;  //通话日期
    
    // 如果队列中cell为空，即无复用的cell，则对其进行初始化
    if (cell == nil) {
        
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1  reuseIdentifier:identifier];
        
        // 定义其辅助样式
        cell.accessoryType      = UITableViewCellAccessoryDetailButton;
        
        //运营商
        CGRect carriersF = CGRectMake(30, 30, 80, 30);
        carriers = [[UILabel alloc] initWithFrame:carriersF];
        carriers.font = [UIFont systemFontOfSize:12];
        [cell addSubview:carriers];
        //电话号码
        CGRect telPhoneF = CGRectMake(30, 8, 80, 30);
        telPhone = [[UILabel alloc] initWithFrame:telPhoneF];
        telPhone.font = [UIFont systemFontOfSize:16];
        [cell addSubview:telPhone];
        //通话时间
        CGRect timeF = CGRectMake(270, 8, 80, 30);
        time = [[UILabel alloc] initWithFrame:timeF];
        time.font = [UIFont systemFontOfSize:16];
        [cell addSubview:time];
        
        //通话日期
        CGRect dateF = CGRectMake(270, 30, 80, 30);
        date = [[UILabel alloc] initWithFrame:dateF];
        date.font = [UIFont systemFontOfSize:12];
        [cell addSubview:date];
    }
    
    NSDate *  senddate=[NSDate date];
    
    NSDateFormatter  *dateformatter=[[NSDateFormatter alloc] init];
    
    [dateformatter setDateFormat:@"YYYY-MM-dd"];
    
    NSString *  locationString=[dateformatter stringFromDate:senddate];
    
    NSArray *array =  [self.dataSourceArray objectAtIndex:indexPath.row];
    
    carriers.text =@"中国移动";
    telPhone.text = array[0];
    time.text = array[1];
    date.text = locationString;
    return cell;
}