How I can pin the tableHeaderView? - swift

Question

Tell me, please, how I can pin the tableHeaderView on the ViewController's screen through code? I use this code, but the tableViewHeader disappears on scrolling:
import UIKit
class TestViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
lazy var tableViewTest = UITableView()
override func viewDidLoad() {
super.viewDidLoad()
createTable()
}
private func createTable() {
self.tableViewTest = UITableView(frame: view.bounds, style: .grouped)
tableViewTest.register(TestTableViewCell.self, forCellReuseIdentifier: "Test")
self.tableViewTest.delegate = self
self.tableViewTest.dataSource = self
tableViewTest.autoresizingMask = [.flexibleWidth, .flexibleHeight]
tableViewTest.separatorInset.left = 10
tableViewTest.separatorInset.right = 10
tableViewTest.tableHeaderView = "Test Header"
view.addSubview(tableViewTest)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 10
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Test", for: indexPath) as! TestTableViewCell
cell.testLabel.text = "test label"
return cell
}
}
This is my second class:
import UIKit
class TestTableViewCell: UITableViewCell {
let testLabel = UILabel()
override func layoutSubviews() {
super.layoutSubviews()
testLabel.frame = CGRect(x: 60, y: 5, width: UIScreen.main.bounds.width - 80, height: 50)
testLabel.numberOfLines = 0
testLabel.sizeToFit()
addSubview(testLabel)
}
override func awakeFromNib() {
super.awakeFromNib()
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
}

Answer 1

Try to use the implicit construct of UITableView
lazy var tableViewTest = UITableView(frame: .zero, style: .plain)
But also you need to change your table header to section header which you can define in UITableViewDelegate method
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let identifier = YourSectionHeaderView.reuseIdentifier
let headerView =
tableView.dequeueReusableHeaderFooterView(withIdentifier: identifier)
return headerView
}
By the way, I also recommend you to use constraint instead of autoresizing mask

Answer 2

Thank you.
This work for me:
import UIKit
class TestViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
lazy var tableViewTest = UITableView()
var segmentedControl = UISegmentedControl(items: ["Test1", "Test2", "Test3"])
override func viewDidLoad() {
super.viewDidLoad()
createTable()
configureSegmentedControl()
}
private func createTable() {
self.tableViewTest = UITableView(frame: view.bounds, style: .plain)
tableViewTest.register(TestTableViewCell.self, forCellReuseIdentifier: "Test")
self.tableViewTest.delegate = self
self.tableViewTest.dataSource = self
tableViewTest.autoresizingMask = [.flexibleWidth, .flexibleHeight]
tableViewTest.separatorInset.left = 10
tableViewTest.separatorInset.right = 10
tableViewTest.tableFooterView = UIView()
view.addSubview(tableViewTest)
}
private func configureSegmentedControl() {
segmentedControl.selectedSegmentIndex = 0
segmentedControl.frame = CGRect(x: 10, y: 150, width: UIScreen.main.bounds.width - 20.0, height: 40)
segmentedControl.layer.cornerRadius = 5.0
segmentedControl.backgroundColor = .blue
segmentedControl.selectedSegmentTintColor = .red
segmentedControl.tintColor = .white
segmentedControl.addTarget(self, action: #selector(changeSegment), for: .valueChanged)
}
#objc func changeSegment(sender: UISegmentedControl) {
switch sender.selectedSegmentIndex {
case 0:
print("Test1")
case 1:
print("Test2")
default:
print("Test3")
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 10
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Test", for: indexPath) as! TestTableViewCell
cell.testLabel.text = "test label"
return cell
}
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
return segmentedControl
}
}