UITableView单元格不显示标签和按钮

Question

I have a UITableView that has its delegate and dataSource properties set correctly, however its content isn't showing.

MY Code

-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

    BOOL notInputNotes;
    UIColor *normalBlue = [[UIColor alloc]initWithRed:0.1 green:0.65 blue:1.0 alpha:0.8];
    HomeWork *hw = [hwArray objectAtIndex:indexPath.row];
    NSString *dateDueAsText = [dateFormat stringFromDate:hw.dateDue];
    CGFloat xForDate;
    if (dateDueAsText.length < 16 || dateDueAsText.length == 16) {
        xForDate = 215;
    }
    else{
        xForDate = 214;
    }
    hw.indexPath = indexPath;
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if(cell == nil){
            cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }
    for (UIView *view in cell.subviews) {
        [view removeFromSuperview];
    }
    if (!isEditing) {
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
        [cell setEditing:NO];
    }
    else{
        cell.selectionStyle = UITableViewCellSelectionStyleDefault;
        [cell setEditing:YES];
    }
    UILabel *subject = [[UILabel alloc]initWithFrame:CGRectMake(70, 5, 150, 45)];
    if(![hw.subject isEqualToString:@""])
    {
        subject.text = hw.subject;
        notInputNotes = NO;
    }
    else{
        subject.text = hw.notes;
        subject.frame = CGRectMake(70, 20, 150, 45);
        notInputNotes = YES;
    }
    [subject setFont:[UIFont systemFontOfSize:20]];
    [subject setTextColor:normalBlue];
    subject.adjustsFontSizeToFitWidth = YES;
    subject.backgroundColor = [UIColor blueColor];//test
    [cell addSubview:subject];
    if(!notInputNotes){
        UILabel *notes = [[UILabel alloc]initWithFrame:CGRectMake(70, 40, 300, 30)];
        notes.text = hw.notes;
        [notes setFont:[UIFont systemFontOfSize:12]];
        notes.adjustsFontSizeToFitWidth = YES;
        [notes setTextColor:[UIColor colorWithRed:0.2 green:0.3 blue:1.0 alpha:1.0]];
        [cell addSubview:notes];
    }
    UILabel *importancy = [[UILabel alloc]initWithFrame:CGRectMake(300, 45, 200, 30)];
    importancy.text = hw.importancy;
    [importancy setFont:[UIFont systemFontOfSize:12]];
    [importancy setTextColor:[UIColor redColor]];
    importancy.adjustsFontSizeToFitWidth = YES;
    [cell addSubview:importancy];
    UILabel *dateDue = [[UILabel alloc]initWithFrame:CGRectMake(xForDate, 10, 200, 30)];
    dateDue.text = [NSString stringWithFormat:@"%@",dateDueAsText];
    [dateDue setFont:[UIFont systemFontOfSize:13]];
    dateDue.textColor = normalBlue;
    dateDue.adjustsFontSizeToFitWidth = YES;
    [cell addSubview:dateDue];
    hw.doneButton = [[UIButton alloc]initWithFrame:CGRectMake(20, 25, 40, 40)];
        if(!hw.done){
            [hw.doneButton setImage:[UIImage imageNamed:@"unchecked.png"] forState:UIControlStateNormal];
        }
        else{
            [hw.doneButton setImage:[UIImage imageNamed:@"checked.png"] forState:UIControlStateNormal];
        }
    [hw.doneButton addTarget:hw action:@selector(done:) forControlEvents:UIControlEventTouchUpInside];
    NSDateComponents *dayComponent = [[NSDateComponents alloc] init];
    dayComponent.day = -1;
    NSCalendar *theCalendar = [NSCalendar currentCalendar];
    NSDate *nowMinus1 = [theCalendar dateByAddingComponents:dayComponent toDate:[NSDate date] options:0];
    NSComparisonResult result;
    result = [nowMinus1 compare:hw.dateDue];
    if(result==NSOrderedDescending && !(hw.done)){
        cell.backgroundColor = [UIColor colorWithWhite:0.86 alpha:0.6];
        NSLog(@"%@ is earlier than %@",dateDueAsText,[dateFormat stringFromDate:nowMinus1]);
            [hw.doneButton setImage:[UIImage imageNamed:@"lighter-gray_unckecked.jpg"] forState:UIControlStateNormal];
        hw.late = YES;
    }
    else{
        cell.backgroundColor = [UIColor whiteColor];
        hw.late = NO;
    }
    [cell addSubview:hw.doneButton];
    return cell;
}

Does somebody know what's wrong there? Thanks in advance.

Note the cell's background color appears different if you set it, so the cells are there and re correctly made the problem is really with the views

Answer 1

I wouldn't say it is a really good practice to remove all subviews of a UITableViewCell and add your own subviews after. It would be better to subclass UITableViewCell.

That being said, you can try this instead, it will display your content.

for (UIView *view in cell.contentView.subviews) {
    [view removeFromSuperview];
}

But your problem definitely comes from you wanting to remove the subviews. If the first problem is cell overlapping try implementing

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    return customHeight;
}