I managed to get this work in the past but now I cannot remember how I did it. I have a UITableView with a dynamic cell and in it, I have an UIView with a height of 174 as a constraint. However, after running the app, it displays the UIView with less height than I defined and also I am getting this error: Warning once only: Detected a case where constraints ambiguously suggest a height of zero for tableviewcell cell's. We're considering the collapse unintentional and using standard height instead:
Those are the constraints I have in the UIView:
I am not able to find a fix for this.
Use this datasource
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 178
}
Related
Hello I have a UITableView with x# of cells. the last cell I have two UILabels. When the second UILabel text is set I am trying to get the cell and the UILabel to resize to show the text.
Here is what I have:
The UILabel - LabelBio (orange) has:
Lines: 0
Baseline: Align Baselines
Line Break: Word Wrap
Autoshrink: Fixed Font Size
The constraints for ContentView, LabelSellerInfo and LabelBio are set as follows:
LabelSellerInfo
LabelBio
ContentView
With those settings here is what a get:
I have tried many variations but cannot seem to get the Bio label to grow and shrink, sometimes if I get the label to grow the cell is still too small.
Can anyone help me to understand what I am doing wrong and show me how to get the constraints correct to get this to work?
Thank you
Set tableView.rowHeight = UITableViewAutomaticDimension
Remove this function in your code func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
Set height constraint of LabelBio greaterOrEqualThan 0
here are the steps ...
hope you know about autylayout. use constraints (left to content view, right to content view, bottom to content view and verticle to your first label)
then in your viewdidLoad method add YourTableView.estimatedRowHeight = 200 -> give any height you want.
finally define below method :
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
you good to go.
I need to set UITableViewCell dynamic height based on it's content.
Here is my demo image:
In this to label which have dynamic content so based on that label content my cell height should change..
I get the constraint error. In this cell two UILabel is available and both have dynamic content size. (I already make the demo with auto resizing cell with only one label.) But in this cell two label are there. So error is xcode suggest me to give Y POS or Height to label, but I already set top constraints. (4 side constraints with label line set to 0 Zero) But still it's fails.
I also try with this code
self.tableView.estimatedRowHeight = 250.0;
self.tableView.rowHeight = UITableViewAutomaticDimension;
Here is my demo code
Look at the screenshot of my output. For both the labels , you should give all the four constrains and you have to change the heights of both the labels priority to 750 & set the hugging and resistance priority to 1000. Then you have to change the number of lines to 0 in storyboard
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
return 250
}
Add this code into viewDidLoad() method:
tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = 44
In Swift 3, Use
func tableView(_ tableView: UITableView,estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
return HEIGHT // Maximum cell height
}
In table view cell, Set dynamic height constraint to the text view (Greater than or equal) - Maximum text view height
I found the problem. After setting text to UILabel, it doesn't still set correct height frame to its content. In cellForRowAt, just add this:
//these make height frame both of labels became correct
cell.lbName.sizeToFit()
cell.lbAge.sizeToFit()
// update cell layout
cell.layoutIfNeeded()
Have a look at the UITableViewDelegate function tableView(_:heightForRowAt:). It’ll work in your case if you are able to calculate the height for a given index path.
I have a tableViewCell with a label inside that could be multiple lines tall. I've set the label's Lines property to 0. However, when I make the label's text have multiple lines the text gets cut off. Here's how I've set up my storyboard:
Does anybody know how I made the table's cells just tall enough to contain the labels within?
Setting Dynamic Cell height procedure
Pin the label from top and bottom. Please refer following Screen shot
Set numbers of line to 0 of the label as from property inspector of xcode, it can be done from code too please refer following screen shot
Implement delegates of table view mentioned below
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
return 50 // also UITableViewAutomaticDimension can be used
}
You are missing the bottom constraint from the label to the table view cell (as far as I can tell). In order to make autolayout know how large the height of the cell has to be, you need to supply those constraints.
In addition do not forget to provide the estimatedRowHeight to the table view. If that value is not given, automatic cell sizing will not work.
Senario A:
If I set the label content in cellForRowAtIndexPath, the cell correctly get resized.
Senario B:
If I change the text content in custom action in cell, the cell sized does not get changed.(I do call setNeedsLayout + layoutIfNeeded)
How to fix this?
EDIT:
1) I have set,
myTableView.estimatedRowHeight = 71.0
myTableView.rowHeight = UITableViewAutomaticDimension
2) I have correctly added auto layout constraints.
I was running into this issue, and my problem was that I was constraining the content to self (the UITableViewCell) and not to self.contentView (the contentView OF the cell). Hope this helps someone else who has built their cells all in code!
In my case, the cell's custom size was enabled:
After you change the text of the cell, just reload that particular cell or simply call mainTableView.reloadData().
To reload that cell-
//indexPath is indexPath of cell you just changed label of
mainTableView.reloadRows(at: indexPath, with: .automatic)
In my case, in the same cell I had an imageView in the top left corner with a "center vertically in container" constraint, and a "top space container" constraint.
Obviously to satisfy this two constraint the cell must have an height equal to:
(height of the imageView / 2) + (length of the top space container constraint).
This height is not enough to fit the label text, so my label had only 1 line visible.
After I have deleted the imageView top constraint all went to the right place, in my case i wanted the image to be centered, if the image had to stay in the top left corner I had to take off the "center vertically in container" constraint.
I hope this can help someone.
First of all, I don't specifically know what was your action on UITableViewCell. So, I assume I do that in UITableViewCell selection.
The below answer only work on iOS 9 and above
But, for some reason, it failed to do it in iOS 8 until it scroll. So, I will update the answer for iOS 8.
I have seen you have used UITableView's estimatedRowHeight and rowHeight at your project. So,
Please check the following
Make sure UITableView's estimatedRowHeight and rowHeight include inside viewDidLoad()
Make sure your UILabel lines set to 0
Make sure there is no constraints about height for your UILabel and let the constraints be like that :
If there are other component also included, make sure only bottom and top space constraints included or top space to container margin and bottom space to container margin.
Every time that you want to update the cell, you have to reload tableView no matter what your current situation will be.
So, don't say anything yet before you try this sample project, #Rikh answer still work. May be you are going in wrong direction. Here's the solution. Please do as I said steps by steps and let me know if that didn't work out. You might need to share your sample project which is causing.
Sample Demo - DynamicCellDemo
UPDATE for iOS 8 : update the following code for iOS 8 users
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if #available(iOS 9, *) {
// do nothing
} else {
tblDynamic.reloadData()
}
}
what you can do is set the AutoLayout constraints for the label in present in the cell from all the sides that is from Top, Bottom, Leading and Trailing. Then add the following UITableViewDelegate method to your class.
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
return 500
}
This will do the job. As now content in table view cell automatically adjusts the height of the cell.
Try this if it works:
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
Add the following in your viewDidLoad()
-(void)viewDidLoad{
[super viewDidLoad];
tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = 140
}
I am trying to resize a tableviewcell based on the size of a UILabel that can be one or more lines. I need autolayout turned ON for the rest of the app, so I don't want to turn it off to get this working. Target is iOS 7 and iOS 8.
I have tried several solutions, but for some reason I can't seem to get the correct height of the label to automatically adjust or to adjust the cell height.
The problem is occurring in this method: calculateHeightForConfiguredSizingCell. I have put a sample project on Git, so you can see what I am seeing.
https://github.com/mdaymond/cellResizer
This example is based on this article: http://www.raywenderlich.com/73602/dynamic-table-view-cell-height-auto-layout
Update
I checked in an update to the code. It's ALMOST working the way I want and calculating programatically, but for some reason the label height isn't quite sized correctly - it's not getting the full height required. Problem with the original code was that the label needed an explicit width.
Here we go, if you are supporting IOS 7 then you need to implement UITableViewDelegate protocol in your class and then override:
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
}
for more information about Dynamic custom UITableViewCell's height based on label text length (check this out) and you can place the code in the heightForRowAtIndexPath function:
height based on label text length
Also override :
func tableView(tableView: UITableView, estimatedHeightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
// example to return the estimated height
return 280
}
Note : by supporting IOS 7 you should handle it manually. there is no such easier way as IOS 8.
But if you are only supporting IOS 8 and later then you can do it simply in the following two lines :
self.tableView.estimatedRowHeight = 280
self.tableView.rowHeight = UITableViewAutomaticDimension
Actually i have download your source code and doing following changes. and UILabel is now support multiline.
Step 1 : Removed programmatically calculate row height. that means commented heightForRowAtIndexPath in your demo.
Step 2: Set following layout constraints on UILabel in your UITableViewCell.
Step 3 : Set number of line to 0 in your xib.
Output :
Here is my code.
func tableView(tableView: UITableView, estimatedHeightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat
{
self.scoutPropertyTable.rowHeight = UITableViewAutomaticDimension + 35
return self.scoutPropertyTable.rowHeight
}