I want to get all the views of a grouped table view to change the label color and to set the background color.
I found the answer, it's not possible to get the header view of a table view section. But you can implement the delegate tableView:viewForHeaderInSection: to recreate the header view and the label. The following code will give you the same header view and the exact label.
- (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] initWithFrame:CGRectMake(20.0f, 5.5f, 300.0f, 30.0f)];
label.backgroundColor = [UIColor clearColor];
label.font = [UIFont boldSystemFontOfSize:16.5];
label.shadowColor = [UIColor whiteColor];
label.shadowOffset = CGSizeMake(0.0, 1.0);
label.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth;
label.text = sectionTitle;
// Create header view and add label as a subview
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, self.view.frame.size.width, 44.0f)];
view.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth;
[view addSubview:label];
return view;
}
That's great you figured out your solution.
A couple of suggestions:
Don't hardcode the CGRect for the width of your frame, but rather use self.view.size.width for the width (e.g. in case you're in landscape orientation or if Apple ever introduces an iPhone with a different screen size);
You probably want to use autoresizingMask for both the label and the view that holds the label, so that they'll resize as the screen orientation changes, or make sure you invoke [self.tableview reloadData] on orientation changes; and
This is obviously a single line label ... if that works for you great, otherwise you'd want to use sizeWithFont:constrainedToSize:lineBreakMode to determine the height, both for creating the label/view as well as responding to tableView:heightForHeaderInSection:.
You also need to add the textColor:
label.textColor = [UIColor colorWithRed:0.265 green:0.294 blue:0.367 alpha:1.000];
Related
So I have code, which is sucessfully working on iOS 7.0 but not in 7.1. I have a simple tableview, with code:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 10;
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 70.0;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:indexPath];
for (UIView *view in cell.contentView.subviews) {
[view removeFromSuperview];
}
UILabel *label = [[UILabel alloc] init];
label.text = [NSString string];
for (NSInteger i = 0; i < 20; i++) {
label.text = [label.text stringByAppendingString:#"label String "];
}
label.translatesAutoresizingMaskIntoConstraints = NO;
label.numberOfLines = 0;
label.lineBreakMode = NSLineBreakByWorldWrapping;
//label.lineBreakMode = NSLineBreakByTruncatingTail; //I have tried this too
[cell.contentView addSubview:label];
NSDictionary *dict = NSDictionaryOfVariableBindings(label);
[cell.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"H:|-8-[label]-8-|" options:0 metrics:nil views:dict]];
[cell.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"V:|-8-[label]" options:0 metrics:nil views:dict]];
if (indexPath.row == 0) {
label.textColor = [UIColor colorWithRed:1.0 green:0 blue:0 alpha:1.0];
}
else if (indexPath.row == 1) {
label.textColor = [UIColor colorWithRed:0 green:1.0 blue:0 alpha:1.0];
}
else if (indexPath.row == 2) {
label.textColor = [UIColor colorWithRed:0 green:0 blue:1.0 alpha:1.0];
}
else {
label.textColor = [UIColor colorWithWhite:0.3 alpha:1.0];
}
cell.backgroundColor = [UIColor colorWithWhite:1.0 alpha:1.0];
return cell;
}
I have 1section with 10rows. With each row reused I delete all subviews from contentView(I tried alloc-init UITableViewCell, but came with the same results).
On iOS 7.0, UILabel is displayed only in cell it belongs to. But in 7.1 UILabel continues displaying over another cells. What is interresting, that when I click on cell, it stop being overlaping by anothers, but only till I click on cell above.
My question is, how to make it work on 7.1devices like on 7.0ones.
I tried both simulator and device and I took a look at iOS 7.1 API Diffs, but found nothing related to this.
Maybe it is issue of Auto Layout, that i have variable height of UILabel, but I need to do so. I want to have all text in UILabel, but display only part of UILabel, that can be displayed in a cell, which is default behavior in 7.0, but 7.1 changes this and I don't why why and how to deal with it.
This is dropbox folder for images with detail explanation: Folder with images
Update: I tried things like tese, but nothing worked for me.
cell.frame = CGRectMake(0, 0, self.tableView.frame.size.width, 70);
cell.contentView.frame = CGRectMake(0, 0, self.tableView.frame.size.width, 70);
cell.opaque = NO;
cell.contentView.opaque = NO;
cell.clearsContextBeforeDrawing = NO;
cell.contentView.clearsContextBeforeDrawing = NO;
cell.clipsToBounds = NO;
cell.contentView.clipsToBounds = NO;
The issue has to do with the height of your cell. It isn't going to dynamically adjust that for you.
You'll probably notice that as you scroll and the view above goes out of view the overlapping text will disappear with it.
If you are wanting your text to clip at a certain height, then you need to set the number of lines, rather than setting it to 0 since that will let it continue forever.
The lineBreakMode won't take effect since it isn't stopped.
Optionally you could try to set clipping on the contentView to make sure all subviews stay inside.
Depending on the end result you want, you could do dynamic heights and change based on the content. There are a bunch of SO questions related to doing this.
Update - clipping the contentView
I'd have to try it out myself, but in lieu of that, here are a couple links related to clipping the contentView:
stop the clipping of contentView - you'd actually want to do the opposite.
adding subview - looks similar to what you are trying to do.
Looks like this works:
cell.clipsToBounds = YES;
Here is the Perfect solution of Overlapping content in Cells.
Just use below code in cellForRowAtIndexPath after allocating cell and before adding subviews.
for (id object in cell.contentView.subviews)
{
[object removeFromSuperview];
}
Actually the overlapping is occurring because whenever you scroll the tableview its allocating your added view again and again. So above code will solve your problem by removing the existing views from cell's contentView.
Now You can see the memory debug session after applying above code, your memory is stable this time.
Hope it'll help you.
Thanks !
This is problem with recreating cell contents. Try with following code segment.
for(UIView *view in cell.contentView.subviews){
if ([view isKindOfClass:[UIView class]]) {
[view removeFromSuperview];
}
}
#Gaurav your answer should be the accepted answer. Thanks!
for object in cell.contentView.subviews
{
object.removeFromSuperview();
}
had similar behavior in iOS 8, using storyboard / IB.
fix was to add a Bottom Space to: Superview constraint from the bottom-most view to bottom of the prototype cell's Content View. The other views and constraints were all anchored from the top.
Are you using storyboards?
If so, select the table view controller in storyboards and uncheck the "Under bottom bars"
You can also do this programmatically.
If your TVC inherits from a nav view controller or a tab view controller, you may need to uncheck this layout option on the parent view instead
Re-checking all 4 constraints helps. While working with table view or collection view it's necessary to apply all four constraints (leading, trailing, top, bottom.)
I provide a custom section header via the tableView's delegate method. It works fine in plane mode but I can't figure out the correct margin in grouped style.
Does anyone know how to make the section header aligned with the tableView cells?
You can create a custom label and adjust its frame accordingly.
For eg.
- (UIView *)tableView:(UITableView *)aTableView viewForHeaderInSection:(NSInteger)section
{
UIView *view=[[UIView alloc] initWithFrame:aTableView.tableHeaderView.frame];
UILabel *label=[[UILabel alloc] initWithFrame: CGRectMake(//set frame of the label as you want)];
[label setFont:[UIFont fontWithName: size:]];
[label setTextColor:[UIColor blackColor]];
[label setShadowOffset:CGSizeMake(0.0f, 1.0f)];
[label setShadowColor:[UIColor redColor];
label.backgroundColor=[UIColor clearColor];
if(section==0)
{
[label setText://set your section0 title];
}
else if(section ==1)
{
[label setText://set your section1 title];
}
[view addSubview:label];
[label release];
return [view autorelease];
}
Hope this helps :)
Not tested in every flavor but a good starting point.
In
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
pass the tableView.style parameter to your own method providing the header.
Create a view a frame like
CGRect(0,0,CGRectGetWidth(tableView.frame), CGRectGetHeight(tableView.frame)
but add a subview with a frame
CGRectInset(frame, 30,0)
if you have a grouped tableView style. Set a the autoresizingMask to flexible width and it works.
Slightly modified in a way that I had to give an additional parameter to the creation method for the SectionHeaderView as the margin is different for presentationStyle FullScreen and Formsheet.
CGFloat margin = 0;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
margin = style == UITableViewStyleGrouped ? modalStyle == UIModalPresentationFormSheet ? 28 : 38 : 0;
}
else {
margin = style == UITableViewStyleGrouped ? 5 : 0;
}
UIView *view = [[UIView alloc] initWithFrame:CGRectInset(frame, margin, 0)];
view.autoresizingMask = UIViewAutoresizingFlexibleWidth;
[self addSubview:view];
EDIT:
After messing with this for days the real questions I have are the following:
1. Does UITableView take up the entire view?
2. If so, how does it set the bounds of the cells to that it looks like it only takes up part of the view.
3. How do I get the bounds of the cells - or more accurately how do I know the bounds of the visible area that the cells are taking up. self.tableView.bounds.size.width does not help because it returns the width of the view.
Thanks.
Leaving the previous info below in case it helps make my question clearer.
Can this be possible?
I have read the apple docs and trolled the forums here and elsewhere and can't find and answer to this.
Does the footer in a UITableVIew actually take up the entire view no matter what you do? Does it not have a concept of the table width?
Example:
- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section {
UIView *footerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, 10)];
[footerView setBackgroundColor:[UIColor redColor]];
return footerView;
}
This code will create a red line from one edge to the other. No matter what boundaries you give it the line will take up the entire view. The problem with this is that if you want to center a label in that footer you don't have any way to know where center is if you are supporting orientation changes.
For instance in an iPad app I am trying to do the following:
if ([footerText length] > 0) {
UIView *customView = [[[UIView alloc]initWithFrame:CGRectMake(0.0, 0.0, 0, 0.0)] autorelease];
[customView setBackgroundColor:[UIColor grayColor]];
UILabel *footerLabel = [[UILabel alloc] initWithFrame:CGRectZero];
footerLabel.numberOfLines = 2;
footerLabel.adjustsFontSizeToFitWidth = NO;
[footerLabel setTextAlignment:UITextAlignmentCenter];
[footerLabel setBackgroundColor:[UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:0.5]];
[footerLabel setOpaque:NO];
[footerLabel setTextColor:[UIColor whiteColor]];
[footerLabel setShadowColor:[UIColor lightGrayColor]];
[footerLabel setFont:[UIFont boldSystemFontOfSize:14]];
[footerLabel setFrame:CGRectMake(customView.center.x/0.3, 0.0, 600, 40.0)];
[footerLabel setText:footerText];
[customView addSubview:footerLabel];
[footerLabel release];
NSLog(#"customView width = %f", customView.frame.size.width);
NSLog(#"tableview width = %f", self.tableView.frame.size.width);
NSLog(#"tableview center = %f", self.tableView.center.x);
return customView;
} else {
return nil;
}
The table's center in portrait should be 384 (it's in the detail view/right side) and 351.5 in landscape. But when I use setCenter or try to adjust the left edge based on that center it does not center up.
Final question: How does one center a custom view in a footer with support for orientation when the footer seems to have no concept of the table bounds? I must be missing something in the docs because this has to be a problem solved by someone else but I can't find it.
Thanks for your time.
To center something within the tableview, you need to wrap it in a container, and set the appropriate autoresize mask for both the embedded view and the container.
The container should be flexible width, and the embedded view should have both flexible side margins.
eg:
- (UIView *) tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
static UIView *footerView;
if (footerView != nil)
return footerView;
NSString *footerText = NSLocalizedString(#"Some Display Text Key", nil);
// set the container width to a known value so that we can center a label in it
// it will get resized by the tableview since we set autoresizeflags
float footerWidth = 150.0f;
float padding = 10.0f; // an arbitrary amount to center the label in the container
footerView = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, footerWidth, 44.0f)];
footerView.autoresizingMask = UIViewAutoresizingFlexibleWidth;
// create the label centered in the container, then set the appropriate autoresize mask
UILabel *footerLabel = [[[UILabel alloc] initWithFrame:CGRectMake(padding, 0, footerWidth - 2.0f * padding, 44.0f)] autorelease];
footerLabel.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;
footerLabel.textAlignment = UITextAlignmentCenter;
footerLabel.text = footerText;
[footerView addSubview:footerLabel];
return footerView;
}
I'm creating a table view controller for an iPad app. This view will potentially be displayed full-screen or within a modal view, so the size could be different each time it's displayed. I'd ideally like to make my code generic enough to work irrespective of the size it's displayed at. (As an academic exercise I'd also like the code to work on the iPhone too - but that's not really a requirement here.)
I'm using a grouped table view style. I want to embed a UITextField into the cell's view. I can get the text field into the cell OK (using cell.AddSubview), but when I use the grouped style, the text field is at the very left of the table - not where it should be in the white area.
I've looked around (e.g. at the UICatalog sample, and at the answers here) and all of the solutions to this problem seem to involve hard-coding a constant x offset for the border area. This x offset is around 35px on the iPad, but is around 20px on the iPhone.
It seems to me that there should be a better way of doing this, but I've yet to find it. I've tried looking at the rectangles cell.Bounds, cell.Frame, cell.ContentView.Bounds, and cell.ContentView.Frame - none of them have the 'actual' content area of a grouped cell.
Does anyone have another suggestion, or do I need to hard-code the value?
Thanks
add any UIViews to cell.contentView and set autoResizeMask property for this view
here is the sample of creating cell with UILabel and UITextField:
// custom cell implementation
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
if ( (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) )
{
self.label = [[[UILabel alloc] init] autorelease];
self.label.font = [UIFont fontWithName:#"Helvetica-Bold" size:17];
self.label.backgroundColor = [UIColor clearColor];
[self.contentView addSubview:self.label];
self.textField = [[[UITextField alloc] init] autorelease];
//this will make our textField resized properly
self.textField.autoresizingMask = UIViewAutoresizingFlexibleWidth;
self.textField.borderStyle = UITextBorderStyleNone;
self.textField.backgroundColor = [UIColor clearColor];
self.textField.textColor = [UIColor darkGrayColor]; //text color
self.textField.font = [UIFont systemFontOfSize:17.0]; //font size
self.textField.autocorrectionType = UITextAutocorrectionTypeNo; // no auto correction support
self.textField.keyboardType = UIKeyboardTypeDefault; // type of the keyboard
self.textField.returnKeyType = UIReturnKeyNext; // type of the return key
self.textField.clearButtonMode = UITextFieldViewModeWhileEditing; // has a clear 'x' button to the right
[self.contentView addSubview:self.textField];
self.selectionStyle = UITableViewCellSelectionStyleNone;
self.accessoryType = UITableViewCellAccessoryNone;
}
return self;
}
and in dataSource method
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
something like that
CustomCell* c = (CustomCell*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier1];
if (c == nil)
{
c = [[[CellWithPass alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier1] autorelease];
c.textField.delegate = self;
}
//in this method cell and cell subviews are not resized, so
//we are setting subviews frames here for cell with frame {{0,0},{320,44}}
c.label.text = #"label";
float w = [c.label.text sizeWithFont:c.label.font].width;
c.label.frame = CGRectMake(10, 0, w, 44);
c.textField.frame = CGRectMake(w + 10, 12, c.contentView.frame.size.width - w - 20, 20);
return c;
I also have been looking for a similar answer.
I am yet to find any kind of "good" answer, but this conversation does kind of shed some light as to why a call to contentView's frame doesn't return the actual frame minus the accessory's dedicated area and rounded edge padding:
UITableViewCell's contentView's width with a given accessory type
I've taken Barrett's advice and just adjusted the frame accordingly with hard coded values, but would be very interested if you find an answer that is better.
A UITableViewCell comes "pre-built" with a UILabel as its one and only subview after you've init'ed it. I'd really like to change the background color of said label, but no matter what I do the color does not change. The code in question:
UILabel* label = (UILabel*)[cell.contentView.subviews objectAtIndex:0];
label.textColor = [UIColor whiteColor];
label.backgroundColor = [UIColor darkGrayColor];
label.opaque = YES;
Your code snippet works fine for me, but it must be done after the cell has been added to the table and shown, I believe. If called from the initWithFrame:reuseIdentifier:, you'll get an exception, as the UILabel subview has not yet been created.
Probably the best solution is to add your own UILabel, configured to your standards, rather than relying on this (very rickety) path to the built-in one.
This doesn't work because the UITableViewCell sets its label backgroundColors in the layoutSubviews method.
If you want to change the color of the built-in textLabel or detailTextLabel, subclass the UITableViewCell and override layoutSubviews. Call the super implementation, THEN change the backgroundColor property to what you want.
- (void) layoutSubviews
{
[super layoutSubviews];
self.textLabel.backgroundColor = [UIColor redColor];
}
Add your own label to the contentView when you are allocating the cell, rather than relying on the extraction of the built in one. Then you can control all values:
UILabel* label = [[[UILabel alloc] init] autorelease];
label.textColor = [UIColor whiteColor];
label.backgroundColor = [UIColor darkGrayColor];
label.opaque = YES;
[cell.contentView addSubview:label];
for (UIView *views in views.subviews)
{
UILabel* temp = (UILabel*)[views.subviews objectAtIndex:0];
temp.textColor = [UIColor whiteColor];
temp.shadowColor = [UIColor blackColor];
temp.shadowOffset = CGSizeMake(0.0f, -1.0f);
}