I'm trying to set the title of the UINavigationBar. If i don't add the UIBarButtons, i can see the title, if i add them, i can't. I want to see both
var cancelBarButtonItem = UIBarButtonItem(
title: "Cancel".localized,
style: .plain,
target: self,
action: #selector(cancelButtonTouched(sender:))
)
var doneBarButtonItem = UIBarButtonItem(
title: "Done",
style: .plain,
target: self,
action: #selector(doneButtonTouched(sender:))
)
override func viewDidLoad() {
super.viewDidLoad()
setupRightNavBarButtons()
self.navigationController?.navigationBar.topItem?.title = "Title"
}
func setupRightNavBarButtons(){
self.doneBarButtonItem.isEnabled = false
navigationItem.leftBarButtonItem = cancelBarButtonItem
navigationItem.rightBarButtonItem = doneBarButtonItem
}
The proper way for a view controller to set itself up for the navigation bar is to set its own navigationItem.
Change:
self.navigationController?.navigationBar.topItem?.title = "Title"
to:
self.title = "Title" // sets the navigationItem title
or:
navigationItem.title = "Title"
Related
I'm trying to add a UIBarButtonItem by doing this function:
func setupBackButton() {
let button = UIButton(type: .custom)
button.setTitle("Done", for: .normal)
button.titleLabel?.font = .systemFont(ofSize: 40)
let barButton = UIBarButtonItem(customView: button)
//assign button to navigationbar
self.navigationItem.leftBarButtonItem = barButton
}
it works on other screens that i add it,
but on a spefic view controller it just doens't add anything.
Here is the storyboard of other screens that it works on them :
And here is the sotryboard in the screen that Doesn't work:
what might be the problem , and why i might not see the button ?
swift 4:
I added a navigation controller:
create UIBarButtonItem on viewcontroller :
override func viewDidLoad() {
super.viewDidLoad()
let leftBarButton = UIBarButtonItem(title: "Edit", style: .done, target: self, action: #selector(myLeftBarButtonItem(_:)))
self.navigationItem.leftBarButtonItem = leftBarButton
}
#objc func myLeftBarButtonItem(_ sender:UIBarButtonItem!) {
print("myLeftBarButtonItem")
}
You may try this:
if you add image in left navbar then write this :
let leftAddBarButtonItemMenu = UIBarButtonItem(image: #imageLiteral(resourceName: "menu"), style: UIBarButtonItemStyle.plain, target: self, action: #selector(self.btnLeftMenuClicked(sender:)))
navigationItem.leftBarButtonItems = [leftAddBarButtonItemMenu]
if you add image in right navbar then write this :
let rightNavBarItem = UIBarButtonItem(image: #imageLiteral(resourceName: "menu"), style: UIBarButtonItemStyle.plain, target: self, action: #selector(self.btnRightClicked(sender:)))
navigationItem.rightBarButtonItem = [rightNavBarItem]
If add Title in right navbar then write this:
let rightNavBarItem = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.plain, target: self, action: #selector(self.btnRightClicked(sender:)))
navigationItem.rightBarButtonItem = [rightNavBarItem]
It may Helps you. Thank you
I have a MainViewController embed in a Navigation Controller, as shown below:
And in MainViewController.swift, I added two UIBarButtonItem(left and right) programmatically:
class MainViewController: UIViewController {
let rightButton = UIBarButtonItem(title: "Right", style: .plain, target: self, action: #selector(onRightClick))
let leftButton = UIBarButtonItem(title: "Left", style: .plain, target: self, action: #selector(onLeftClick))
override func viewDidLoad() {
super.viewDidLoad()
navigationItem.rightBarButtonItem = rightButton
navigationItem.leftBarButtonItem = leftButton
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
#objc func onRightClick() {
print("[Main] Right Click")
}
#objc func onLeftClick() {
print("[Main] Left Click")
}
}
The buttons did show on the screen, but the interesting thing is, the selector functions onLeftClick and onRightClick never get called whenever I pressed left or right button. Is there anything I should do to make it works? I am using Xcode 9.3.
try with inside scope once
override func viewDidLoad() {
super.viewDidLoad()
let rightButton = UIBarButtonItem(title: "Right", style: .plain, target: self, action: #selector(self.onRightLeftClick(_ :)))
rightButton.tag = 1
let leftButton = UIBarButtonItem(title: "Left", style: .plain, target: self, action: #selector(self.onRightLeftClick(_ :)))
rightButton.tag = 2
self.navigationItem.rightBarButtonItem = rightButton
self.navigationItem.leftBarButtonItem = leftButton
}
handle the action as
func onRightLeftClick(_ sender: UIBarButtonItem){
if sender.tag == 1{
// rightButton action
}else{
// leftButton action
}
}
You can also just add the lazy keyword to the rightButton and leftButton class properties. That way, the UIBarButtonItem won't be instantiated (and the action selectors won't attempt to be resolved) until they are used inside the class. Doing it this way allows you to use the barButtonItems anywhere in the class (not just in the function they are declared in).
lazy var rightButton = UIBarButtonItem(title: "Right", style: .plain, target: self, action: #selector(onRightClick))
lazy var leftButton = UIBarButtonItem(title: "Left", style: .plain, target: self, action: #selector(onLeftClick))
I am trying to insert a segmented control inside a navigation bar programmatically and am having some trouble loading the segmented controller in the nav bar. I am sure this very simple, but see code below. Thanks in advance!
var segmentedController: UISegmentedControl!
override func viewDidLoad() {
super.viewDidLoad()
navigationItem.titleView = segmentedController
let items = ["Label A", "Label B"]
segmentedController = UISegmentedControl(items: items)
navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Sign Out", style: .plain, target: self, action: #selector(handleSignOut))
navigationItem.leftBarButtonItem?.tintColor = UIColor.black
}
You should add the segmentedController to the navigation bar after initializing it!
var segmentedController: UISegmentedControl!
override func viewDidLoad() {
super.viewDidLoad()
let items = ["Label A", "Label B"]
segmentedController = UISegmentedControl(items: items)
navigationItem.titleView = segmentedController
navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Sign Out", style: .plain, target: self, action: #selector(handleSignOut))
navigationItem.leftBarButtonItem?.tintColor = UIColor.black
}
I have an array of UIToolbar items that show when an inputField becomes first responder.
//... code
toolBar.items = [
UIBarButtonItem(title: "Button 1", style: UIBarButtonItemStyle.Plain, target: self, action: #selector(myFunction))]
myInputField.inputAccessoryView = toolBar
Is that possible to call myFunction from the above example with a parameter?
Something like...
... #selector(myFunction(someParameter)))
Similar to UIButton, parameters can be passed via the tag attribute of UIBarButtonItem.
override func viewDidLoad() {
super.viewDidLoad()
let toolBar = UIToolbar()
let firstButton = UIBarButtonItem(title: "Button 1", style: UIBarButtonItemStyle.Done, target: self, action: #selector(myFunction))
let secondButton = UIBarButtonItem(title: "Button 2", style: UIBarButtonItemStyle.Done, target: self, action: #selector(myFunction))
firstButton.tag = 1
secondButton.tag = 2
toolBar.items = [ firstButton, secondButton ]
toolBar.sizeToFit()
textField.inputAccessoryView = toolBar
}
func myFunction(sender: UIBarButtonItem) {
print("Tapped: \(sender.tag)")
}
Tapping a button prints the button's tag in this example:
Tapped: 1 // Tap button 1
Tapped: 2 // Tap button 2
I have a UITableView in a UIViewController and have added an edit button from code rather than IB. This comes with UITableViewControllers but not UIVCs. How can I get this button to put the table view into editing mode in swift? Thanks in advance for any help.
class WordsViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, UITextFieldDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.navigationItem.rightBarButtonItem = self.editButtonItem()
}
func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
return true
}
}
Here is a solution for Swift 4.2:
override func viewDidLoad() {
super.viewDidLoad()
// Use the edit button provided by the view controller.
navigationItem.rightBarButtonItem = editButtonItem
}
override func setEditing(_ editing: Bool, animated: Bool) {
// Takes care of toggling the button's title.
super.setEditing(editing, animated: true)
// Toggle table view editing.
tableView.setEditing(editing, animated: true)
}
The view controller's setEditing is called by default when the editButtonItem is pressed. By default, pressing the button toggles its title between "Edit" and "Done", so calling super.setEditing takes care of that for us, and we use the tableView's setEditing method to toggle the editing state of the table view.
Sources:
https://developer.apple.com/documentation/uikit/uiviewcontroller/1621471-editbuttonitem
https://developer.apple.com/documentation/uikit/uiviewcontroller/1621378-setediting
https://developer.apple.com/documentation/uikit/uitableview/1614876-setediting
Create rightBarButtonItem as below with an action.
In viewDidLoad() :
let rightButton = UIBarButtonItem(title: "Edit", style: UIBarButtonItemStyle.Plain, target: self, action: Selector("showEditing:"))
self.navigationItem.rightBarButtonItem = rightButton
and then make a function like,
func showEditing(sender: UIBarButtonItem)
{
if(self.tableView.isEditing == true)
{
self.tableView.isEditing = false
self.navigationItem.rightBarButtonItem?.title = "Done"
}
else
{
self.tableView.isEditing = true
self.navigationItem.rightBarButtonItem?.title = "Edit"
}
}
Make sure, : is appended to function name in Selector of action in viewDidLoad
Hope it helps!
Swift 3 & 4 answer that IMHO is better than other answers:
override func viewDidLoad() {
super.viewDidLoad()
let editButton = UIBarButtonItem(title: "Edit", style: .plain, target: self, action: #selector(toggleEditing)) // create a bat button
navigationItem.rightBarButtonItem = editButton // assign button
}
#objc private func toggleEditing() {
listTableView.setEditing(!listTableView.isEditing, animated: true) // Set opposite value of current editing status
navigationItem.rightBarButtonItem?.title = listTableView.isEditing ? "Done" : "Edit" // Set title depending on the editing status
}
Why do I think it's better:
Fewer code lines.
Bar button is initialized once but not every time you press the button.
Call this method on button click.
tableView.setEditing(true, animated: true)
Or if you want it to work like a toggle use
tableView.setEditing(!tableView.editing, animated: true)
I assume you have a button, which calls editButtonPressed on press. So implementation of this method could look like this.
override func viewDidLoad(){
navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Edit", style: UIBarButtonItemStyle.Plain, target: self, action: Selector("editButtonPressed"))
}
func editButtonPressed(){
tableView.setEditing(!tableView.editing, animated: true)
if tableView.editing == true{
navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.Plain, target: self, action: Selector("editButtonPressed"))
}else{
navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Edit", style: UIBarButtonItemStyle.Plain, target: self, action: Selector("editButtonPressed"))
}
}
This also changes title of the bar button.
Override the view controller's -setEditing:animated:, call super, and call the same method on your table view.
- (void)setEditing:(BOOL)editing animated:(BOOL)animated
{
[super setEditing:editing animated:animated];
[self.tableView setEditing:editing animated:animated];
}
First :
let editButton = UIBarButtonItem(title: "Edit", style: .plain, target: self, action: #selector(showEditing(_:)))
navigationItem.rightBarButtonItem = editButton
Then :
#objc func showEditing(_ sender: UIBarButtonItem)
{
if(self.tableView.isEditing == true)
{
self.tableView.isEditing = false
self.navigationItem.rightBarButtonItem?.title = "Edit"
}
else
{
self.tableView.isEditing = true
self.navigationItem.rightBarButtonItem?.title = "Done"
}
}
Swift 3.0 version of njuri post:
override func viewDidLoad() {
super.viewDidLoad()
PackageNameLabel.text = detailPackageName
navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Edit", style: UIBarButtonItemStyle.plain, target: self, action: #selector(PackageDetailsTableViewController.editButtonPressed))
}
func editButtonPressed(){
tableView.setEditing(!tableView.isEditing, animated: true)
if tableView.isEditing == true{
navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.plain, target: self, action: #selector(PackageDetailsTableViewController.editButtonPressed))
}else{
navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Edit", style: UIBarButtonItemStyle.plain, target: self, action: #selector(PackageDetailsTableViewController.editButtonPressed))
}
}
You only need 1 line of code in viewDidLoad() to get edit button and its related functionality.
navigationItem.rightBarButtonItem = editButtonItem