无法在 UILabel 中为数组数据显示新行

Question

I have an array. In that I have data like

"multi": ["New York","Los Angeles", "California", "Huston"]

And this above array I am trying to display in UILabel .

 cell.dynamicLbl.text = array.joined(separator: "\n")

even tried with following

 cell.dynamicLbl.text = array.joined(separator: ",")

but, its showing only first index of an array. Even, I added label properties to show multiple lines.

    cell.dynamicLbl.lineBreakMode = .byWordWrapping
    cell.dynamicLbl.numberOfLines = 0

My total array is if I print in console

▿ 4 elements
  - 0 : "New York"
  - 1 : "Los Angeles"
  - 2 : "California"
  - 3 : "Huston"

And I already set my label with constraints. PFA.

And took height constant for constraint and calculating the height of the text and assigning that float value to constraint constant.

@IBOutlet weak var optionsLblHeightConstraint: NSLayoutConstraint!

Still showing first data of array in label.

Any suggestions?

Out put

Answer 1

Check your cell.label.numberOfLines is set to 0 and lineBreakimgMode to .wordWrap .

And cell constraints for top and bottom are set to contentView and heightForRow tableview func returns tableview.automaticDimension

Answer 2

Instead of setting the Height for your label in the cell, try to set top, bottom, leading, trailing anchors.

You need to make sure that the label has auto layout set and it is anchored with topAnchor and bottomAnchor inside the cell. Afterwards set the following code inside ViewDidLoad

//this is to automatically manage the height of the label.
tableView.rowHeight = UITableViewAutomaticDimension
//give a approximate height for cell below
tableView.estimatedRowHeight = 300

Answer 3

Don't set the height constraint of your UILabel . Just add trailing , leading , top and bottom constraints.

No need to calculate height. Set lineNumber of your UILabel as 0 .

Inside viewDidLoad set the below properties of your UITableView .

tableView.estimatedRowHeight = 44.0
tableView.rowHeight = UITableViewAutomaticDimension

Please check there should not be any height calculations anywhere and heightForRowAtIndexPath should not be written for this auto-resizing cells.

Answer 4

Finally I found the answer, Its the issue with contraint relation. Earlier it was like "Equal" relation. After changing to "Grater Than or Equal" fixed the issue.

Hope this will help someone in future.