For an iPhone, I've got a UITableView that is grouped, has one section, and in which I've set up a section header that's a UILabel object from the nib. When the table view displays, the header shows up as a stripe of solid black -- no text.
In heightForHeaderInSection I've set the height to be the frame.size.height of the UILabel object. When I change the height in IB, the black stripe's height changes. So I know that the .m file has latched on to the right UILabel object.
In the debugger, in viewForHeaderInSection, it seems that the width of the UILabel object is zero, and the height is 1079574528, and the text is null.
Any thoughts on what I'm doing wrong?
Not sure what you're doing wrong, but here is some example code that might help (from a post on my blog):
#define SectionHeaderHeight 40
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
if ([self tableView:tableView titleForHeaderInSection:section] != nil) {
return SectionHeaderHeight;
}
else {
// If no section header title, no section header needed
return 0;
}
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
NSString *sectionTitle = [self tableView:tableView titleForHeaderInSection:section];
if (sectionTitle == nil) {
return nil;
}
// Create label with section title
UILabel *label = [[[UILabel alloc] init] autorelease];
label.frame = CGRectMake(20, 6, 300, 30);
label.backgroundColor = [UIColor clearColor];
label.textColor = [UIColor colorWithHue:(136.0/360.0) // Slightly bluish green
saturation:1.0
brightness:0.60
alpha:1.0];
label.shadowColor = [UIColor whiteColor];
label.shadowOffset = CGSizeMake(0.0, 1.0);
label.font = [UIFont boldSystemFontOfSize:16];
label.text = sectionTitle;
// Create header view and add label as a subview
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, SectionHeaderHeight)];
[view autorelease];
[view addSubview:label];
return view;
}
I had the same issue and haven't quite figured why the black bar..
BUT, instead of providing the header and footer views in delegate methods,
if i set values for tableView.tableHeaderView and tableView.tableFooterView, its all fine !
Can you post the code for your heightForHeaderInSection and your viewForHeaderInSection functions? The theory behind what you're doing sounds correct, but without seeing the code, it would be nearly impossible to figure out the issue...
It sounds like you place a label on the view in IB and are trying to use that as your header view - which is not the proper way of doing things. If you aren't using viewForHeaderInSection, then give that a try.. like this:
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UILabel *lbl;
lbl.text = #"Header for The Only Section";
//define other properties for the label - font, shadow, highlight, etc...
return lbl;
}
3.1.3 doesnt like [UIColor clearColor]; try using the same background color as your tableview
I observed same behavior when refreshing after datasource is loaded.
I noticed this was due to the way i was refreshing table view.
//[self loadView]; this caused the section header to go black.
[self.tableView reloadData]; // this works!
Related
I want to display a table with custom header titles.
The table view is attached to a controller class that implements the tableview delegate and data source protocols but is not a subclass of UIViewController because the table is a subview to be displayed above another tableview.
some snippets of my code:
The tableview is created programmatically:
_myListView = [[UITableView alloc] initWithFrame:tableFrame style:UITableViewStyleGrouped];
[_myListView setDataSource:self.myListController];
[_myListView setDelegate:self.myListController];
[_myListView setBackgroundColor:darkBackgroundColor];
where myListController is a strong property in the class.
For the number of rows in sections:
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
…
return count;
}
The number of sections:
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [someDelegate sectionCount];
}
For the custom Header View:
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UIView* headerView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, tableView.bounds.size.width, SectionHeaderHeight)];
UILabel* sectionHeaderTitle = [[UILabel alloc] initWithFrame:CGRectMake(20, 3, 300, 24)];
[headerView setBackgroundColor:[UIColor clearColor]];
sectionHeaderTitle.text = [self myTitleForHeaderInSection:section];
sectionHeaderTitle.textColor = [UIColor whiteColor];
sectionHeaderTitle.textAlignment = UITextAlignmentLeft;
[headerView addSubview:sectionHeaderTitle];
return headerView;
}
For the custom headerViewHeight (as required since iOS5):
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
if ( [self tableView:tableView numberOfRowsInSection:section] > 0) {
return SectionHeaderHeight;
} else {
return 0;
}
}
Sadly, the tableview does not display any section headers just as if I would return nil.
However, I have checked with a breakpoint, that the code actually returns an UIView.
Everything else works fine.
What am I missing? PLease, don't hesitate to make me feel ashamed of my self.
I don't really understand why you want to use a custom view, and not the "standard" one ? You may have your reasons, but I don't see anything in your code telling me why :)
I would personally just use this:
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
if (section == 0) return #"First section header title";
if (section == 1) return #"Second section header title";
else return nil;
}
Tell me if that's not what you're looking for !
I seem to have found a solution:
I have created a lazy loading strong property for each header view I want to display. (luckily there are only three)
Now the views are shown.
It seems that the header views got deallocated without the strong references before the table was rendered.
Could it be that there is a connection to the class implementing the table view delegate and data source protocols is not a UIViewController?
Text Color you change it to Black color and check once.
sectionHeaderTitle.textColor = [UIColor blackColor];
you try this code this work on my side :-)
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UIView *view=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 24)];
UIImage *myImage = [UIImage imageNamed:#"SectionBackGround.png"];
UIImageView *imageView = [[UIImageView alloc] initWithImage:myImage];
imageView.frame = CGRectMake(0,0,320,24);
UIImage *imageIcon = [UIImage imageNamed:#"SectionBackGround.png"];
UIImageView *iconView = [[UIImageView alloc] initWithImage:myImage];
iconView.frame = CGRectMake(0,0,320,24);
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, tableView.bounds.size.width, 24)];
label.text = [tableView.dataSource tableView:tableView titleForHeaderInSection:section];
label.backgroundColor = [UIColor clearColor];
label.font = [UIFont boldSystemFontOfSize:14];
[view addSubview:imageView];
[view addSubview:iconView];
[view addSubview:label];
return view;
}
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
return 24;
}
I am using a static grouped UITableView to display some settings to the user. Above each group I have a header with a title.
I want to customize the look of the table view and I want to use this look throughout the whole application. Therefore I have subclassed the UITableViewController and my TableViewControllers are inheriting from my subclass.
Is there a way to enter a title for a header using Interface Builder and in my UITableViewController subclass change the look of the header?
I tried retrieving the title using [self tableView:self.tableView titleForHeaderInSection:section] but quickly after posting this question I realized it should have been called from super. Therefore:
[super tableView:self.tableView titleForHeaderInSection:section].
The header can be customized using
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
NSString *title = [super tableView:self.tableView titleForHeaderInSection:section];
if (title.length == 0) return nil;
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 40)];
label.textColor = [UIColor whiteColor];
label.backgroundColor = [UIColor clearColor];
label.text = title;
return label;
}
I have added a light white/gray color to the background to see what happens when the "Delete Confirmation" is on. My problem is that when the delete button animates on screen, it does not reposition the content of my cell so I have this strange overlapping issue. Could anybody please help me? Do I have to make my own animation etc for this? Thank you.
EDIT ADDED CODE: (I have removed the autoresizing because I don't get it to work..)
- (UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *LogCellId = #"LogCellId";
UITableViewCell *cell = [tv dequeueReusableCellWithIdentifier:LogCellId];
UILabel *lblSummary;
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:LogCellId] autorelease];
lblSummary = [[[UILabel alloc] initWithFrame:CGRectMake(10.0, 10.0, 260.0, 30.0)] autorelease];
lblSummary.font = [UIFont fontWithName:#"Helvetica-Bold" size:13];
lblSummary.tag = SUMMARY_TAG;
lblSummary.lineBreakMode = UILineBreakModeTailTruncation;
lblSummary.opaque = YES;
lblSummary.backgroundColor = [UIColor colorWithRed:240.0/255.0 green:240.0/255.0 blue:240.0/255.0 alpha:1.0];
[cell.contentView addSubview:lblSummary];
cell.contentView.backgroundColor = [UIColor colorWithRed:240.0/255.0 green:240.0/255.0 blue:240.0/255.0 alpha:1.0];
} else {
lblSummary = (UILabel *)[cell viewWithTag:SUMMARY_TAG];
}
lblSummary.text = [self.logList objectAtIndex:[indexPath row]];
return cell;
}
You have most likely added your control/s to the cell-view itself. Dont do that but add your control/s to the UITableViewCell.contentView - that will make sure that your cell gets properly animated when switching to edit-mode.
Added after seeing the updated question
Also make sure your just control/s have autoresizingMask = UIViewAutoresizingFlexibleWidth; set.
Depends how you did you cell. But the autoresizeMask property might help ;)
"The content view of a UITableViewCell object is the default superview for content displayed by the cell. If you want to customize cells by simply adding additional views, you should add them to the content view so they will be positioned appropriately as the cell transitions into and out of editing mode."
http://developer.apple.com/library/ios/#documentation/uikit/reference/UITableViewCell_Class/Reference/Reference.html#//apple_ref/occ/instp/UITableViewCell/contentView
How can I change the separator line that appears at the end of each cell in UITableView?
I want to have an image that is a thin separator type line image.
Set the separatorStyle of the tableview to UITableViewCellSeparatorStyleNone. Add your separator image as subview to each cell and set the frame properly.
Try this
Objective C
[TableView setSeparatorStyle:UITableViewCellSeparatorStyleSingleLine];
[TableView setSeparatorColor:[UIColor colorWithPatternImage:[UIImage imageNamed:#"Divider_line#2x.png"]]];
Swift
tableView.separatorStyle = UITableViewCellSeparatorStyle.SingleLine
tableView.separatorColor = UIColor(patternImage: UIImage(named: "YOUR_IMAGE_NAME")!)
First you can write the code:
{ [self.tableView setSeparatorStyle:UITableViewCellSeparatorStyleNone];}
after that
{ #define cellHeight 80 // You can change according to your req.<br>
#define cellWidth 320 // You can change according to your req.<br>
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UIImageView *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"seprater_line.png"]];
imgView.frame = CGRectMake(0, cellHeight, cellWidth, 1);
[customCell.contentView addSubview:imgView];
return customCell;
}
}
Set the color of the separator to be patterned with your image.
in viewDidLoad:
self.tableView.separatorColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"mySeparatorImage"]];
My project is based on iOS 7
This helps me
[self.tableView setSeparatorStyle:UITableViewCellSeparatorStyleNone];
Then put a subview into cell as separator!
Try this:
UIImageView *separator = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"separator.png"]];
[cell.contentView addSubview: separator];
That's an example of how I got it to work pretty well.
Remember to set the separator style for the table view to none.
You can add a UIImageView that is, for example, 1 point high and as wide as the cell's frame, and then set its origin to the bottom left corner of the cell.
Here's the way to do this via storyboard in XCode 10.2.1. Separator defaults to default which is the line. Set it to none to remove the line.
This is definitely help. Working.
but set separator "none" from attribute inspector.
Write following code in cellForRowAtIndexPath method
UIView *lineView = [[UIView alloc] initWithFrame:CGRectMake(0,
cell.contentView.frame.size.height - 1.0,
cell.contentView.frame.size.width, 1)];
lineView.backgroundColor = [UIColor blackColor];
[cell.contentView addSubview:lineView];
Swift 3/4
Custom separator line, put this code in a custom cell that's a subclass of UITableViewCell(or in CellForRow or WillDisplay TableViewDelegates for non custom cell):
let separatorLine = UIView.init(frame: CGRect(x: 8, y: 64, width: cell.frame.width - 16, height: 2))
separatorLine.backgroundColor = .blue
addSubview(separatorLine)
in viewDidLoad method:
tableView.separatorStyle = .none
You have 2 options to change the separator style of a uitableview if you want to change the default options which are no separators, solid line or etched line.
The easiest consist in including a separator line background image
to each cell view. You may check then where is located your cell in
the tableview to apply the right background image that will give you
either a separator line on top of the cell or at the bottom of the
cell.
Set the separator style to none in the viewDidLoad of your
tableview:
[self.tableView setSeparatorStyle:UITableViewCellSeparatorStyleNone];
Set your background image in the (UITableViewCell
*)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath function
UIImage* yourBgImg = [[UIImage imageNamed:#"bgImage.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(5, 5, 5, 5)];
cell.backgroundView = [[UIImageView alloc] initWithImage:yourBgImg];
check the position of your cell in the section with the following:
NSInteger sectionRows = [tableView
numberOfRowsInSection:[indexPathsection]]; NSInteger row =
[indexPath row];
Add the separator line as a cell. I find a post recently for this
here:
http://www.dimzzy.com/blog/2012/01/separator-cells-for-uitableview/#disqus_thread
you can try below:
UIView *separator = [[UIView alloc] initWithFrame:CGRectMake(0, cell.contentView.frame.size.height - 1.0, cell.contentView.frame.size.width, 1)];
separator.backgroundColor = myColor;
[cell.contentView addSubview:separator];
or
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"separator.png"]];
imageView.frame = CGRectMake(0, 100, 320, 1);
[customCell.contentView addSubview:imageView];
return customCell;
}
Here is an alternate way to add a custom separator line to a UITableView by making a CALayer for the image and using that as the separator line.
// make a CALayer for the image for the separator line
CALayer *separator = [CALayer layer];
separator.contents = (id)[UIImage imageNamed:#"myImage.png"].CGImage;
separator.frame = CGRectMake(0, 54, self.view.frame.size.width, 2);
[cell.layer addSublayer:separator];
Simplest way to add a separator line under each tableview cell can be done in the storyboard itself.
First select the tableview, then in the attribute inspector select the separator line property to be single line. After this, select the separator inset to be custom and update the left inset to be 0 from the left.
Example
I've got an annoying problem in my tableview. I was able to achive color-changing cells (blue/white/blue/...), but now I'm in trouble with my text, which has a white background on the blue cells.
I've tried for testing to set a background color to red:
// try to set the backgroundcolor of the text ???
cell.textLabel.text.backgroundColor = [UIColor redColor];
which doesn't work; hmph.
Please have a look at my code below; can anybody tell me what's wrong and how I can solve my problem by giving the text a transparent background?
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
}
// Set up the cell
cell.textLabel.text=[RssFeedNodes objectAtIndex:indexPath.row];
// try to set the backgroundcolor of the text ???
cell.textLabel.text.backgroundColor = [UIColor redColor];
// show image in cell
NSString *imageName=#"rss.png";
cell.imageView.image=[UIImage imageNamed:imageName];
// changing colors in cells
NSInteger row = [indexPath row];
if (row % 2){
cell.contentView.backgroundColor = [UIColor whiteColor];
}
else {
cell.contentView.backgroundColor = [UIColor colorWithRed:0.90f green:0.95f blue:1.0f alpha:1.0f];
}
return cell;
}
Your answer is found (and described very well) here: http://undefinedvalue.com/2009/11/02/easy-gradient-backgrounds-uitextviewcells
My brief summary of the solution: Subclass the UITableViewCell, and then use your subclass when creating instances in cellForRowAtIndexPath.
You then need to override just one method (setSelected) in your subclass UITableViewCell:
(void)setSelected:(BOOL)selected animated:(BOOL)animated {
[super setSelected:selected animated:animated];
// Configure the view for the selected state
for (UIView *view in self.contentView.subviews) {
view.backgroundColor = [UIColor clearColor];
}
}
The reason appears to be that the built-in UITableViewCell class will set the label background to white (or selected color) when being displayed based on the selection state in the table in the setSelected method. Substitute your own, call the base class implementation, then set your subview backgrounds to clear in order to let your contentView background shine through.
text has no background, but textLabel has. so
[[cell textLabel] setBackground:[UIColor redColor]];
You'll need to add your own UILabel label onto the cell, and set the background colour of that to transparent. For some reason the label that a table cell has does not have a settable background colour.
Something like:
UILabel* label = [[UILabel alloc] init];
label.frame = CGRectMake( 20, 10, 200, 22 );
label.backgroundColor = [UIColor clearColor];
label.opaque = NO;
label.text = #"your text here:";
[cell addSubview:label];
[label release];
In this example I've set the frame for the label fairly arbitrarily (well not, actually, this was modified from some of my own real code). You may need to be more dynamic with the sizing, in which case you'll probably need to subclass the cell and override setFrame to keep the label's frame in sync. But hardcoded values should get you going for now.
#define LABEL_TAG 99
// whatever your label rect size should be... change as appropriate
UIlabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 300.0, 30.0)];
label.tag = LABEL_TAG;
// set up alignment, font, autoresizemask, etc.
label.backgroundColor = [UIColor clearColor];
label.opaque = NO;
[cell.contentView addSubview:label];
[label release];
Something to watch out for is that you're not adding your own label to a reuseable table cell more than once. By setting a known view.tag property you can get at (or discover existence of) the UILabel view. [cell viewWithTag:LABEL_TAG]
Whenever you dequeue a reuseable cell, first get the reference to your label view, then do what you would normally do if you were using the UITableCell's textLabel.