UITableView tableView viewForHeaderInSection example in Objective C (iOS).

UITableView tableView viewForHeaderInSection

Asks the delegate for a view object to display in the header of the specified section of the table view.

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section

Parameters of [UITableView tableView viewForHeaderInSection]
tableView
The table-view object asking for the view object.
section
An index number identifying a section of tableView .

Return Value
A view object to be displayed in the header of section .

Discussion of [UITableView tableView viewForHeaderInSection]
The returned object can be a UILabel or UIImageView object, as well as a custom view. This method only works correctly when tableView:heightForHeaderInSection: is also implemented.

UITableView tableView viewForHeaderInSection example.

-(CGFloat) tableView:(UITableView *)tableView
  heightForHeaderInSection:(NSInteger)section
{
    return 44.0;
}

-(UIView *) tableView:(UITableView *)tableView
viewForHeaderInSection:(NSInteger)section
{
    UILabel *l = [[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320, 44)] autorelease];
    l.backgroundColor = [UIColor clearColor];
    l.text= @"I am a Section Header";
    return l;
}

Example of [UITableView tableView viewForHeaderInSection].

- (CAGradientLayer *) greyGradient {
    CAGradientLayer *gradient = [CAGradientLayer layer];
    gradient.startPoint = CGPointMake(0.5, 0.0);
    gradient.endPoint = CGPointMake(0.5, 1.0);

    UIColor *color1 = [UIColor colorWithRed:255.0f/255.0f green:255.0f/255.0f blue:255.0f/255.0f alpha:1.0];
    UIColor *color2 = [UIColor colorWithRed:240.0f/255.0f green:240.0f/255.0f blue:240.0f/255.0f alpha:1.0];

    [gradient setColors:[NSArray arrayWithObjects:(id)color1.CGColor, (id)color2.CGColor, nil]];
    return gradient;
}

- (UIView *) tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
    CGFloat width = CGRectGetWidth(tableView.bounds);
    CGFloat height = [self tableView:tableView heightForHeaderInSection:section];
    UIView *container = [[[UIView alloc] initWithFrame:CGRectMake(0,0,width,height)] autorelease];
    container.layer.borderColor = [UIColor grayColor].CGColor;
    container.layer.borderWidth = 1.0f;
    CAGradientLayer *gradient = [self greyGradient];
    gradient.frame = container.bounds;
    [container.layer addSublayer:gradient];

    UILabel *headerLabel = [[[UILabel alloc] initWithFrame:CGRectMake(12,0,width,height)] autorelease];
    headerLabel.backgroundColor = [UIColor clearColor];
    headerLabel.font= [UIFont boldSystemFontOfSize:19.0f];
    headerLabel.shadowOffset = CGSizeMake(1, 1);
    headerLabel.textColor = [UIColor whiteColor];
    headerLabel.shadowColor = [UIColor darkGrayColor];
    NSString *title = [self tableView:tableView titleForHeaderInSection:section];
    headerLabel.text = title;
    return container;
}

UITableView tableView viewForHeaderInSection example.

-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
NSLog(@"calling view for header");
UIView *customView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 480, 30.0)];

if(section == 0){
// create the label object
UILabel * headerLabel = [[UILabel alloc] initWithFrame:CGRectZero];
headerLabel.backgroundColor = [UIColor clearColor];
headerLabel.opaque = NO;
headerLabel.textColor = [UIColor blackColor];
headerLabel.highlightedTextColor = [UIColor whiteColor];
headerLabel.font = [UIFont boldSystemFontOfSize:20];
headerLabel.frame = CGRectMake(20.0, 0.0, 100.0, 30.0);

headerLabel.text = @"Totals";

NSString *path = [[NSBundle mainBundle] pathForResource:@"images/minus" ofType:@"gif"];
UIImage *theImage = [UIImage imageWithContentsOfFile:path];
UIImageView *imageView = [[[UIImageView alloc] initWithImage:theImage] autorelease];
[customView addSubview:imageView];
[customView addSubview:headerLabel];

}
else {
NSLog(@"test 2");
}
return customView;
}

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
if(section == 0){
return 50;
}
return 30;

}

End of UITableView tableView viewForHeaderInSection example article.