I know we can add background images/colors to section headers in dynamic table view/cells but can anyone help me do the same in a table view using Static Cells ?
What I want to do is use a background image for my 3rd section in a TableView which is using static cells (total of 4 sections it has)
I want to add a background image and change text color to say some RGB value for the 3rd section
You can use the delegate methods of UITableView to set the height and view for a section header. This should do what you want:
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
return (section == 2)? 100:30;
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, tableView.frame.size.width, 100)];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, tableView.frame.size.width, 100)];
label.text = #"Description";
label.textColor = [UIColor whiteColor];
[imageView addSubview:label];
imageView.image = [UIImage imageNamed:#"House.tiff"];
return (section == 2)? imageView:nil;
}
UITableViewCells have the backgroundView property which is a UIView. You can change that to be a UIImageView, for example, or build a more complex background for you table view cells. It shouldn't matter, whether the cell is static or dynamic.
The text color for the cell can then simply be changed by setting the UITableViewCells cell.textLabel.textColor.
Same applies for the UITableViewHeaderFooterView, which are (as the name says) used for the header and footer of your table view sections. In code, you can access the header for a section using
- (UITableViewHeaderFooterView *)headerViewForSection:(NSInteger)section
This saves you from completely recreating the header from scratch, just to make small adjustments. Alternatively, override
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
and build a custom UIView that will become your header.
You should assign a tag(say 15) to the static cell in
tableview:didSelectRowForIndexPath
and then
- (void) tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
if(cell.tag==15)
cell.backgroundColor = [UIColor colorWithRed:255/255.0 green:250/255.0 blue:243/255.0 alpha:1.0];
}
Related
I have a UITableView set to the UITableViewStyleGrouped style. Whenever a section has one or more items, it displays a one pixel separator beneath the section header. However, if the section has no items, there is no separator between sections.
How can I get the separator to appear in all sections, even those that have no cells?
Notice how section 1 and 2 have a separator between them and their first cell, but section 3 doesn't have a separator between it and section 4.
One solution is to add a footer to each empty section:
- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {
return [self tableView:tableView numberOfRowsInSection:section] == 0 ? 0.5 : 0.00000001;
}
- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section {
if ([self tableView:tableView numberOfRowsInSection:section] == 0) {
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.bounds.size.width, 0.5)];
view.backgroundColor = tableView.separatorColor;
return view;
} else {
return nil;
}
}
Notes:
This uses the separatorColor to ensure it is consistent with the other lines in the table view.
Instead of returning 0 in heightForFooterInSection, it returns a very small number instead.
This produces correct results most of the time:
... but has several problems:
This exploits the footer, so if you need to display a footer, this solution probably won't work.
In edit mode, when you drag the last item out of a section, the border will disappear between that section and the one below it.
In edit mode, when you drag an item into an empty section, there will be a double border at the bottom of the section.
Example of problems 2 and 3:
In the above image, notice how there is no line between sections 2 and 3, since all the items were moved out of that section (problem 2).
Also notice how the last items in section 3 and 4 have double borders, since they were dragged into new sections (problem 3).
You can try customize your section header view. use this delegate funciton: - (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section;
Use this two method to add separator between Section.
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
return 44.0;
}
- (UIView *) tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.bounds.size.width, 30)];
[headerView setBackgroundColor:[UIColor brownColor]];
UIImageView *img = [[UIImageView alloc]initWithFrame:CGRectMake(0, 43, 320, 1)];
img.backgroundColor = [UIColor whiteColor];
[headerView addSubview:img];
return headerView;
}
I got a table view with two sections, no crazy code, just my delegate methods.
It works pretty fine, like i want it to work. It should just look like on this screenshot:
Now the problem is: Sometimes while scrolling or flicking the scoll view to the bounds, this happens (if you can't see it: There is 1 or 1/2 pixel in gray on the top of the second section header, what is not intended to be so):
So, is this a iOS 7.1 or 7.x bug? I'm not using a custom view for the header. Does anyone know how to fix this?
Feedback really is appreciated.
I had this same problem that I battled for a few weeks, and the way I solved it was to set the tableView's separatorStyle to UITableViewCellSeparatorStyleNone, and add a custom subview that is a line to the cell's contentView.
Then in your cellForRowAtIndexPath method, hide the line subview of the last cell in the section:
- (UIView *)lineView
{
// Your frame will vary.
UIView *colorLineView = [[UIView alloc]initWithFrame:CGRectMake(82, 67.5, 238, 0.5)];
colorLineView.backgroundColor = [UIColor blackColor];
return colorLineView;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell;
static NSString *identifier = #"cellIdentifier";
UIView *lineView = [self lineView];
self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
if (cell == nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
cell.selectionStyle = UITableViewCellSelectionStyleDefault;
[cell.contentView addSubview:lineView];
}
if (indexPath.section == 0)
{
if (indexPath.row == keys.count -1)
{
lineView.hidden = YES;
}
}
return cell;
}
It may be recycling one of the cell views with the separator from the scroll. This is a long shot, but what if you were to try tweaking the footer view for the section by returning an empty view?
-(UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section {
return [[UIView alloc] init];
}
It's also a good trick for removing empty cells from the table when you have only a couple rows.
I tried it with multiple different things and the cleanest approach i found is this.
I created a custom view for the header, but wanted it to look the same as the original not modified header:
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.frame.size.width, 34)];
[headerView setBackgroundColor:[UIColor groupTableViewBackgroundColor]];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(15, 0, tableView.frame.size.width, 34)];
[label setFont:[UIFont boldSystemFontOfSize:14]];
if (section == 0) {
NSMutableArray *difficultyArray = [dictionary objectForKey:#"Difficulty"];
NSString *difficulty = [difficultyArray objectAtIndex:0];
[label setText:[NSString stringWithFormat:#"Time Challenge (%#)", difficulty]];
} else {
[label setText:#"Freeplay (5x5 board)"];
}
[headerView addSubview:label];
return headerView;
}
Now we got the sections as they would appear without custom header views, but the bug still exists. I made it simple and clean:
UIView *lineFix = [[UIView alloc] initWithFrame:CGRectMake(0, 77.5, self.tableView.frame.size.width, 0.5)];
lineFix.backgroundColor = [UIColor groupTableViewBackgroundColor];
[self.tableView addSubview:lineFix];
Now we set a view over the buggy seperator with a height of 0.5 pixel, the seperator isn't visible anymore. Between the two section headers now is a 0.5 height view what shouldn't be there, but since i set it the same color as the section background color it isn't noticeable. The view moves, because it is a subview of the tableview, the same direction like the tableview.
If you have questions, just add a comment.
My app contains a UITableView which has section footers. When the user scrolls to the bottom of the tableView, sometimes a separator inset appears between the last cell and the tableFooter. This behaviour is inconsistent.
Is there a way to force this separator to always appear or never appear? Did any of you noticed this same inconsistent behaviour? Seems like a bug to me.
EDIT
I'm using
- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
UILabel *footer = [[UILabel alloc] init];
footer.backgroundColor = [UIColor whiteColor];
footer.font = [footer.font fontWithSize:15];
footer.textAlignment = NSTextAlignmentCenter;
return footer;
}
but you could easily reproduce the same problem only using
- (NSString *)tableView:(UITableView *)tableView titleForFooterInSection:(NSInteger)section;
To do this you'll have to override the standard UIView used as the footer.
You can do this by overriding the delegate method -(UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section.
-(UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
UIView *myFooterView;
// create a view with a label and without a line at the top etc...
return myFooterView;
}
I am not sure why you are getting inconsistent results. Maybe try to add a background to your footer view. Here is my code:
-(UIView *) tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
UIView *footerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 33)];
[footerView setBackgroundColor:[UIColor grayColor]];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, footerView.bounds.size.width, 20)];
label.text = #"Footer";
[label setTextAlignment:NSTextAlignmentCenter];
[footerView addSubview:label];
return footerView;
}
And here is the result:
This is a bit of a lazy way of doing it but it works none the less.
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"CellIdentifyer"];
if (indexPath.row == tableArray.count) {
cell.separatorStyle = UITableViewCellSeparatorStyleNone;
}
return cell;
}
here is the solution, very easy!
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"CellIdentifyer"];
cell.separatorInset = (indexPath.row == totalNumber-1) ? UIEdgeInsetsMake(0, INT16_MAX, 0, 0) : UIEdgeInsetsZero;
return cell;
}
I found some workaround about it:
Whenever you expect this extra separator could appear (for example, when user scrolls to the bottom like you described) - add these lines of code:
tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
tableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine;
The logic is something like that: first string of code removes bottom separator, and the second one doesn't add it. It worked for me in some cases, but it is not a 100% fix.
I guess, it might be an Apple bug also, as sometimes bottom separator disappears in their 'Reminders' app.
Normally my screen display is like this:
When I use this code
- (UIView *) tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.bounds.size.width, 30)];
[headerView setBackgroundColor:[UIColor whiteColor]];
return headerView;
}
my output is like this:
My section index text is not visible. I know that the section header view add my custom view. I want to change section header color and also display index text.
#Khawar answer i get this output
this is work 100% and you can change your index or header text color
- (void)tableView:(UITableView *)tableView willDisplayHeaderView:(UIView *)view forSection:(NSInteger)section
{
view.tintColor = [UIColor blueColor];
// if you have index/header text in your tableview change your index text color
UITableViewHeaderFooterView *headerIndexText = (UITableViewHeaderFooterView *)view;
[headerIndexText.textLabel setTextColor:[UIColor blackColor]];
}
output:
Try to set the height for UITableView header.
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
return 30.0;
}
If you only need to change the background color of section header while displaying section title, you don't need to create custom view for that. Custom view would overwrite your default header and your title would not be shown, unless you add custom UILabel in your custom view. Just use following UITableView delegate to change background color.
- (void)tableView:(UITableView *)tableView willDisplayHeaderView:(UIView *)view forSection:(NSInteger)section {
view.tintColor = [UIColor redColor];
}
See results before and after.
----------------Before------------------
----------------After------------------
Hope this fixes the issue.
You have to give title for section... Or you can use this method..
- (UIView *) tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UILabel *headerView = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, tableView.bounds.size.width, 30)];
[headerView setBackgroundColor:[UIColor colorWithWhite:0 alpha:0.5]];
headerView.text = [self tableView:tableView titleForHeaderInSection:section];
return headerView;
}
So my UITableView has a header, which is the UIImageView shown, and comments below the image. I am trying to increase the space between the image and the comments table.
(I have tried increasing the height of the header, but it doesn't work in my case because it will result in a bigger UIImageView and the image won't cover the view completely)
I experimented with this hack:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"CommentsTableCell";
CommentsCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
Comment *comment = [self.comments objectAtIndex:indexPath.row];
[cell setUsername:comment.handle andText:comment.text];
/* Dirty hack:
1. We cannot increase the height of the header because that will leave spaces in the image.
2. The only way we can increase the margin from the comments table to the picture is by
increasing the individual inset of the first and last comments cell
*/
if (indexPath.row == 0) {
[cell setContentInset:UIEdgeInsetsMake(COMMENTS_PADDING * 10 , 0, 0, 0)];
} else if (indexPath.row == [self.comments count] - 1) {
[cell setContentInset:UIEdgeInsetsMake(0, 0, COMMENTS_PADDING * 10 , 0)];
}
return cell;
}
and in my CommentsCell.m:
- (void)awakeFromNib {
self.commentText.scrollEnabled = false;
self.commentText.editable = false;
self.commentText.contentInset = UIEdgeInsetsMake(-1 * COMMENTS_PADDING, 0, 0, 0);
}
- (void)setUsername:(NSString *)username andText:(NSString *)text {
[self.commentText setAttributedText:[CommentsCell getContentStringForUsername:username andText:text]];
}
- (void)setContentInset:(UIEdgeInsets)inset {
self.commentText.contentInset = inset;
}
but the first comment still has the same inset. I checked the debugger and awakeFromNib is occurring before cellForRowAtIndexPath. Do you see why my method is not working?
I am also open to other suggestions.
You should be able to add some space to the header view just below the image you display. Instead of setting the table's header view to a UIImageView, why not create a container view that you can add the image view to and then just have some space below it.
- (UIView *) buildTableHeaderView {
UIImage *image = [UIImage imageNamed: #"my_image.png"];
CGFloat height = image.size.height + 20;
UIImageView *imageView = [[UIImageView alloc] initWithFrame: CGRectMake(0, 0, self.myTableView.frame.size.width, height)];
[imageView setImage: image];
UIView *headerView = [[UIView alloc] initWithFrame: CGRectMake(0, 0, self.myTableView.bounds.size.width, height)];
[headerView addSubview: imageView];
return headerView;
}
What you can do is create a custom UIView (with .xib if you want for easier UI design) with a space on the bottom and return it from - (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section method of the UITableViewDelegate, also don't forget to return the height for the header view by implementing the - (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section method of the same UITableViewDelegate.
Here is a short example:
-UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
YourCustomHeaderView *headerView = [YourCustomHeaderView instantiateView]; //static method (you can rename it) that will load the custom view from a .xib
//do aditional UI setup or not
return headerView;
}
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
return DEFAULT_HEADER_HEIGHT; //a defined value
}
If you are having a single header view, then you should use the same custom header view creation/init/setup, but move your table downwards in is superview and add the custom header view at the top at any position you like.