I habe a tableView with a footerView. It should display a simple label.
In my ViewController, in viewDidLoad
, I assign the tableFooterView like so:
let footerView = MyFooterView(frame: CGRect(x: 0, y: 0, width: tableView.frame.width, height: 0))
tableView.tableFooterView = footerView
MyFooterView
is a UIView with a single label. The label setup looks like so:
label.font = someFont
label.adjustsFontForContentSizeCategory = true
label.textColor = .black
label.numberOfLines = 0
label.text = "my super looooooong label that should break some lines but it doesn't."
label.textAlignment = .center
label.translatesAutoresizingMaskIntoConstraints = false
addSubview(label)
NSLayoutConstraint.activate([
label.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 40),
label.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -40),
label.topAnchor.constraint(equalTo: self.topAnchor, constant: 20),
label.bottomAnchor.constraint(equalTo: self.bottomAnchor, constant: -20)
])
In order to get AutoLayout to work with MyFooterView
, I call this method inside UIViewControllers viewDidLayoutSubviews
:
func sizeFooterToFit() {
if let footerView = self.tableFooterView {
footerView.setNeedsLayout()
footerView.layoutIfNeeded()
let height = footerView.systemLayoutSizeFitting(UIView.layoutFittingCompressedSize).height
var frame = footerView.frame
frame.size.height = height
footerView.frame = frame
self.tableFooterView = footerView
}
}
Problem: The lines in the label do not break. I get the following result:
What can I do so that the label has multiple lines? AutoLayout is working thanks to the method sizeFooterToFit
. The only thing is that the labels height is only as high as a single line.
HERE is the way how you can achieve it for tableHeaderView
and with your case you just need to add below code in your UIViewController
class
override func viewWillLayoutSubviews() {
super.viewWillLayoutSubviews()
tbl.updateHeaderViewHeight()
}
And Helper extension
extension UITableView {
func updateHeaderViewHeight() {
if let header = self.tableFooterView {
let newSize = header.systemLayoutSizeFitting(CGSize(width: self.bounds.width, height: 0))
header.frame.size.height = newSize.height
}
}
}
And remove
func sizeFooterToFit() {
if let footerView = self.tableFooterView {
footerView.setNeedsLayout()
footerView.layoutIfNeeded()
let height = footerView.systemLayoutSizeFitting(UIView.layoutFittingCompressedSize).height
var frame = footerView.frame
frame.size.height = height
footerView.frame = frame
self.tableFooterView = footerView
}
}
Above code.
And result will be: