I want to make my table view cell like progress bar . How much progress is done according to that cell's background colour should change . I am not able to do that in UITableViewCell .
Edit
Its not about changing the colour of the alternative cells . Its about two applying two colours into same cell.
Make custom tableview cell class. Add view with 0 or 1 width and required height to cell from interfacebuider to cell's content view or if want to add programmatically then add that view from awakeFromNib of custom cell class method.
Then set desired background color of that view and add increase it's width as per progress.
If there is no specific progress then you can add animation with some duration to increase it's width.
If you are using autolayout then manipulate constraint's outlet to increase width, if not using autolayout then manipulate view's frame to increase width.
Hope this will help :)
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *temp= #"CustomCell";
CustomCell *cellheader = (CustomCell *)[tableViewObj dequeueReusableCellWithIdentifier:temp];
// add your if condition
cellheader.contentView.backgroundColor = [UIColor colorWithRed:72.0/255.0 green:72.0/255.0 blue:72.0/255.0 alpha:1.0];
}
Related
As in the image below, the UITableView subview appears only on tableview reload or cell reuse (during scrolling, mostly). The blue color circle is what I want in my UITableViewCell. When it first appears, it will be a small dot as you can see in the picture, and on scrolling or refreshing the tableview, it appears as the full circle.
What can be the issue?
I use the following code in cellforRowAtIndexPath method
cell.categoryRoundBackground.layer.cornerRadius=cell.categoryRoundBackground.frame.size.height/2;
try using dequeueReusableCellWithIdentifier: forIndexPath:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
CustomTableViewCell *cell1 = (CustomTableViewCell *)[tableView dequeueReusableCellWithIdentifier:#"CustomID" forIndexPath:indexPath];
The most likely problem is that at the moment when you access your cell's frame height the first time by calling
cell.categoryRoundBackground.frame.size.height / 2
the cell has never been placed in a table view, it has no idea what its frame height is going to be, and so it uses some default value. The actual height depends on the value returned by your code in heightForRowAtIndexPath: method.
You can work around this problem by computing the frame size yourself. You should be able to do that, because your code supplies the value to heightForRowAtIndexPath:.
It's possible that you change the corner radius before that the view layouts its subviews.
You should try to put the line
cell.categoryRoundBackground.layer.cornerRadius=cell.categoryRoundBackground.frame.size.height/2;
inside
- (void)viewDidLayoutSubviews {}
You have to Override the method in CustomTableViewCell
- (void)layoutSubviews{
[super layoutSubviews];
self.categoryRoundBackground.layer.cornerRadius=self.categoryRoundBackground.frame.size.height/2;
self.categoryRoundBackground.layer.masksToBounds = YES;
}
and In CellForRowAtIndexPath: you have to write these lines at the end
// Update layout
[cell.contentView setNeedsLayout];
[cell.contentView layoutIfNeeded];
Hope it will solve your problem
I change the frame of cells (add margins to the left and to the right) according to the code. The problem is cells update their frames only after they disappear and appear again via scrolling. I used table view's - reloadData as well, but it did't help. How do I force cells to be redrawn without scrolling?
- (UITableViewCell *) tableView: (UITableView *) tableView
cellForRowAtIndexPath: (NSIndexPath *) indexPath {
PersonTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier: #"TableViewCellID"
forIndexPath: indexPath];
cell.frame = CGRectMake(20, cell.frame.origin.y, cell.frame.size.width-2*20, cell.frame.size.height);
/* tried any of those
[cell setNeedsDisplay];
[cell setNeedsLayout];
[cell layoutIfNeeded];
*/
return cell;
}
I'd recommend using .xibs for this. Much easier.
As far as I know, you are not able to change the frame of a cell in that manner. The cell's height is determined by heightForRowAtIndexPath, and the width is set to the width of the tableView.
You may be able to do it in some manner the way you are attempting, but the cleanest way I know is the following.
If you want there to be a margin around the cell, you can:
Create a nib for a UITableViewCell with a UIView containing all your views, and place a border using constraints.
Embed all your content inside a UIView (lets call this borderedContentView) and place this as the immediate subview of contentView
Place constraints relating borderedContentView to the contentView, with the leading, trailing, top and bottom constraints set to the values that create the border width you desire.
If your tableView has a backgroundColor, you'll have to set the contentView's backgroundColor to the same color as the tableView's backgroundColor so as to create the illusion of a margin. Do this in the tableView's delegate method willDisplayCell: or in a subclass of UITableViewCell awakeFromNib or other related method.
Bask in the glory of your margined cells.
You can also do this programmatically if you prefer not to use interface builder, but it is very easy to do in IB.
Hope this helps.
The solution to the problem is to override setFrame method of UITableViewCell. This way it perfectly works.
I have a custom UITableCell that has labels and a UIView.
Lets say the tablecell is set at a height of 50px and 10 labels are placed with 10px seperation. With cell.clipToBounds = YES, we only see 5 of the labels which is nice and expected.
The custom UIView on this custom table cell is say 200px in height. I ASSUMED the UIView would get clipped as the labels did because the UIView is added as a subview to the cell itself which clips everything else just fine but the UIVIew doesnt get clipped at all. The entire UIView (200px height) is shown.
pseudo code:
cellForRowAtIndexPath... ... {
...
...
CustomCell * cell = ... ...
cell.clipToBounds = YES;
cell.customView.hidden = NO;
[self.view addSubView:cell.customView];
[self.view bringSubviewToFront:cell.customView];
}
In storyboard i literally create a custom cell and add 10 labels as mentioned above and drag and drop a UIView in the cell with a large height.
So why don't views added to "content view" of UITableViewCell get clipped?
also set cell viewContent clipsToBound
cell.contentview.clipToBounds = YES;
and also check if the cells are overlapping, then make sure you are passing the right height in heightForRowAtIndexPath method of tableview.
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
return 50;
}
I have a standard UINavigationController with a UITableViewController at it's root. In IB, I paint a prototype cell with a label and a UIView. The UIView contains a button. I'd like the UIView to be x-aligned after the label, as a function of the length of text in the label.
In IB, the view's left side is initially aligned with the label's left side. There are no layout constraints in IB.
Here's my cellForRowAtIndexPath ...
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 5;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
NSArray *labels = #[#"SOME STRING", #"SHORTER", #"A VERY MUCH LONGER ONE", #"REGULAR ONE", #"TINY"];
UILabel *label = (UILabel *)[cell viewWithTag:32];
label.text = labels[indexPath.row];
UIView *view = [cell viewWithTag:33];
CGSize size = [label.text sizeWithAttributes:#{NSFontAttributeName:label.font}];
view.frame = CGRectOffset(label.frame, size.width, 0);
return cell;
}
Two problems: I've set breakpoints and watch this code running the first time the view appears. I see the view.frame get changed for each row, but the view does not change position. I remains in it's IB-position, right on top of the label. If I scroll the table down, the views on lower cells (presumably reused) are in the desired position. If I scroll back up, the upper rows are also good. It just fails to work on the initial presentation of the upper cells.
Second problem is that the button contained in only the first row has a subtle, strange effect applied to it's text, like a blur. See attached...
First Row Button (zoomed in mac preview... see that extra blur on the left edge of the letters?)
Other Row Buttons
Stuff I tried:
I've tried a few variations, including using a regular view controller with a table view added (rather than a UITableViewController). I've found that if I reloadData on viewDidAppear, that solves the placement problem, but not the blurry button. (Also, I don't like the idea of needing to reload on viewDidAppear). Doing so on viewWillAppear has no effect at all. I've also tried animating the label change slowly. It happens, but again, only on the second time the cell is configured. I try changing the UIView color to prove the code is being run. The color change happens every time, including the first time, but not the view placement. Am I nuts?
For problem 1:
Try calling [cell layoutIfNeeded] before returning the cell, there should be no performance hit when it does not need relayout.
For problem 2:
try calling CGRectIntegral before you set the frame. ie
view.frame = CGRectIntegral( CGRectOffset(label.frame, size.width, 0) );
I have a Tableview that has a UIView and a label inside each row, and this UITableView resize its rows using
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
Well, my problem is that when I resize the cell, its view is resized automatically too. How can I avoid resizing the view inside the cell?
The property autoresizesSubviews of your cells prevents any subviews within your cells to resize automatically. By setting it at NO, it should fix your problem.
cell.autoresizingMask = NO;
However, I would suggest using the method below when playing with the size of cells.
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
Good luck
You should set a proper autoresizing mask or autolayouts rules of the cell subviews, to obtain the layout you want for your cells
you can set the label's contentMode.
for example:
UILabel *lb...(create)
lb.contentMode=UIViewContentModeScaleToFill (change that ,)
cell addSubView:lb;