I have a UITableView with grouped style. I have set the footer height to 0.
tableView.sectionFooterHeight = 0.0
When I scroll down all the way I get a grey area at the bottom of the table view.
How do I get rid of this area?
Edit: This problem only happens for grouped table style. If I use plain style I don't get the blank area. But using a plain style is not an option for other reasons.
It must be the height of section footer which is consuming this area. Try setting the following:
func tableView(tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
return CGFloat.min
}
Instantiate the tablefooter view with a UIView eg:
`tableView.tableFooterView = UIView()`
Related
I have a TableViewController which contains 2 sections:
Section 1 - is a cell which is loaded from a xib file. This cell just contains a TextView.
Section 2 - Contains multiple cells populated from an Array.
The section 1 only exists if the master (previous) UITableView cell you select contains a certain piece of data.
All of the above works as expected, below is the parent view. The list of items come from a database, some items have a description, and some do not. For example below this image, you'll see the view is 'Classic Starters' is selected. Then below that, you'll see the view if 'Stir Frys' is selected. Stri Frys contains a description:
Now, what I want is, the description cell which is shows on the Stir Frys page, to automatically grow depending on the length of the text inside it. So if a description is 10 lines long, it will grow to show all 10 lines.
Does this have to be done programmatically, or is their a feature in XCode I'm missing ?
You can use UITableViewAutomaticDimension.
1)
Set properties estimatedRowHeight and rowHeight of your tableview, in viewDidLoad for example. Like this :
self.tableView.estimatedRowHeight = 50
self.tableView.rowHeight = UITableViewAutomaticDimension
2) Return UITableViewAutomaticDimension in your heightForRowAt delegate method :
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
First you need to do is to set estimatedRowSize to a value that best estimates most common size, and rowSize to UITableViewAutomaticDimension:
self.tableView.estimatedRowHeight = 44
self.tableView.rowHeight = UITableViewAutomaticDimension
In your case, since except the first one all the other cells are supposed to be the same, you can use the height of the rest of the cells as the estimatedRowHeight.
You don't have to implement heightForRowAt at all.
The second step you need to do is to setup proper constraints on the cells. That means you have to constrain the contents of the cell to the left, right, top and bottom of the cell, so that when contents grow, the cell will need to grow, too. Common mistake is to forget to constrain bottom, so then the cell does not grow and the contents leak through the bottom of the cell.
Third, since your dynamic cell contains UITextView, you need to make sure that it will grow with its text. That is not automatic. To achieve that, based on this answer, this should suffice (in the cell):
textView.isScrollEnabled = false
If you are using storyboard, just uncheck scroll enabled.
So currently, I have a tableviewcell that looks like this
What I want to happen, is that if an expense of the date already exists, the top label should disappear, the tableviewcell height should be reduced from 95 to 64 and everything should be centrally aligned. Sort of like this
I tried doing this many ways.
Use 2 different cells and switch, but that didn't work as only one expense was returned at a time and my tableviewcontroller didn't populate correctly.
Try using a stack view, but in that, I can't get the constraints to match as they are currently.
I have all the correct row height being returned in the heightForRowAtIndexPath method, but it centrally reduces the height and some of the data is cut.
How is it possible to achieve what I want to do (have the label not visible, the row height reduced and everything vertically center)?
Here is the code for switching of the cells.
func tableView(_ tableView: UITableView,
heightForRowAt indexPath: IndexPath) -> CGFloat
{
if newMode==true {
return 95
}
else if newMode==false {
return 64
}
else {
return 0
}
}
This works, however it reduces the height from the top and the bottom and I only want the height from the top to be reduced.
You should not use the delegate method heightForRowAt instead you should use:
tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = 80
then give the (date of expense) label a hight constraint and connect an outlet to it.
in cellForRowAtIndex delegate method should have :
if expense != nil
{
lblExpenseConstraintHeight.constant = 0
}
else
{
lblExpenseConstraintHeight.constant = 34
}
cell.layoutIfNeeded()
Edit:
More info about about dynamic tableViewHeight:
Using Auto Layout in UITableView for dynamic cell layouts & variable row heights
Another possible solution is remove the height constraint of the (date of expense) label and set it's text to empty string.
I want to split my ViewController into three equal sections eg. "What", "Why", "Where" and when each view is tapped it goes to a se. I thought about using a UIViewController and having three separate views and then using a tap gesture with each view that takes to an appropriate page.
But then I thought maybe I could use a master-detail tableviewcontroller and an array of three strings to populate each cell.
override func numberOfSections(in tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 3
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return 1
}
I don't know which way is more legitimate and with the tableviewcontroller my main issue is cell height. Because there is only one cell in each section ideally i'd like the cell height to take up the full height of the section but not sure if i can set cell height to 100% for example.
Thank.
If you really just want 3 equally sized sections and you're building for >= iOS9, the easiest and fastest way would be to just use a vertical UIStackView.
Just set it's alignment to fill and its distribution to fill equally, drop in 3 UIButtons. Give you're stackView's topAnchor, bottomAnchor, leadingAnchor and trailingAnchor a constraint of 0 to the superview.
Of course you can use a UITableView, but it would be quite a lot of work to make sure, that your cells have a third of the screen size each. You would have to ensure that they adapt dynamically based on the screen size (which totally is possible). Also if you use a tableView, for something like this a static one is best. Then you don't have to implement a lot of the delegate methods like cellForRow etc.
I've an issue for few days and really I can't explain why it goes like that.
I'm doing a chat, set up with a tableView, printing message into cell. These cells are designed with prototypes, there are 3 different type (but anyway it doesn't matter). Text is typed, message is send, cell is inserted in table and then we scroll to the bottom of the tableView.
As you know, in a chat view the container of the message has to fit this text (which is a view), and then the cell has to fit to this container (Label in orange, container in purple).
This container has a variable height and grow along the text, changing cell height.
I've set many constraint for auto-layout display but I didn't have different cell height than the height I initially set for it in the project (no adaptative behaviour). Chat Message were cut.
So, I've tried to set each rowHeight by myself using the method heightForRowAtIndexPath, calculating constraint along text size but it create a real bad behaviour (changing cells when scrolling for example). The size was often wrong calculated/recalculated.
That's why I'm finally using estimatedRowHeight set to 44 combine with UITableViewAutomaticDimension. Here it does the trick ! Waouh ! But it's not as good as expected..
When the table view appears all is good. Containers fit to their label, rows' height fit to their container and it's beautiful. The problem appears during an insert.
After many tests, I notice that this bad behaviour only appears when multilines label remains in the table view.
During an insert, each cell seems to resize to 44 before adapt its height to content, and then create a gap compared to previous state which create a strange scroll of the table view :
If I change the estimatedRowHeight it made this worst.
I can show my code if you want, but I don't think it will be very useful here because I'm not using complicated function.. only insert, automatic height for cells and scroll down which are functions delegate for tableView.
Can you help me please ? Really I don't know how to change that.. every chat application does the trick but I can't found out the way.
Thank you for answer, excuse my english level I'm a poor french student..
If you need some code comment I'll give it.
I think you can cache height value for every cell in cellForRowAtIndex method and in HeightForRowAtIndex set the corresponding height for that cell.
You can just do this way :
var cellCached = Dictionary<Int,AnyObject>()
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
table.rowHeight = yourCell.yourLabel.frame.origin.y + yourCell.yourLabel.frame.height + 10
cellCached[indexPath.row] = yourTable.rowHeight
}
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
if(tableView == yourTable)
{
if(cellCached[indexPath.row] != nil)
{
return cellCached[indexPath.row] as! CGFloat
}
else
{
return 200
}
}
else
{
return UITableViewAutomaticDimension
}
}
I want cell separators in every single one of my sections other than section 0.
Between "New Game", "Friends", "Random", "Judge", and "Challenges" I don't want any separators. The cell type in section "0" or "New Game" is different than the other sections' cell types so I tried this: iOS swift remove UITableView Cell separator space but it didn't work.
Another issue I'm facing is how to erase the space left when a header is gone because it has no rows in it.
Here is a picture:
As you can see, "Waiting For Opponent" has disappeared because there are no rows in the section.
So to be extremely clear:
How do I conditionally hide the separators in section 0 without hiding the entire tableView's separators?
How do I hide the space that is created when I hide a section header?
I can think of two options:
Hide the separators entirely and implement your own separator by adding a UIView with 1-2pt height placed at the bottom of the cell which can then be hidden/unhidden based on your requirements in cellForRowAtIndexPath. OR
In cellForRowAtIndexPath, change the insets of the separator for that cell so that the separator goes out of the view. Eg:
cell.separatorInset = UIEdgeInsetsMake(0.f, 0.f, 0.f, cell.bounds.size.width-cell.layoutMargins.left)
Have you tried returning zero in tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat ??