Is there a way to make a two line prompt for a swift navigation bar? I currently cannot find a property to modify. The text I am currently displaying in the prompt comes from an external data model, so sometimes there is more text than fits on the screen. Thanks.
Image Showing Text Outside of Frame
You can try like this:
Swift 3.0
let label = UILabel(frame: CGRect(x:0, y:0, width:350, height:50)) //width is subject to change, Defined as per your screen
label.backgroundColor =.clear
label.numberOfLines = 2
label.font = UIFont.boldSystemFont(ofSize: 16.0)
label.textAlignment = .center
label.textColor = UIColor.white
label.text = "Your Text here"
self.navigationItem.titleView = label
Navigation bar has a title and a prompt
navigationItem.title = "Title, large"
navigationItem.prompt = "One line prompt, small text, auto-shrink"
Having a prompt could be better that having a custom title view, because it gives you more height and it works great with searchbars. But make sure this is really what you want, since the code bellow is not tested on all devices iOS versions. This will just give you an idea how you can control almost anything regarding layout in the navigation bar
class MyNavigationBar: UINavigationBar {
func allSubViews(views: [UIView]) {
for view in views {
if let label = view as? UILabel, label.adjustsFontSizeToFitWidth {
if label.numberOfLines != 2 { //this is the promp label
label.numberOfLines = 2
let parent = label.superview
parent?.frame = CGRect(x: 0, y: 0, width: parent!.bounds.width, height: 44)
parent!.removeConstraints(parent!.constraints)
label.removeConstraints(label.constraints)
label.leadingAnchor.constraint(equalTo: parent!.leadingAnchor, constant: 20).isActive = true
label.trailingAnchor.constraint(equalTo: parent!.trailingAnchor, constant: -20).isActive = true
label.topAnchor.constraint(equalTo: parent!.topAnchor).isActive = true
label.bottomAnchor.constraint(equalTo: parent!.bottomAnchor).isActive = true
}
return
}
self.allSubViews(views: view.subviews)
}
}
override func layoutSubviews() {
super.layoutSubviews()
allSubViews(views: self.subviews)
}
}
To use your navigation bar use:
let navVc = UINavigationController(navigationBarClass: MyNavigationBar.self, toolbarClass: nil)
Related
I recently added a side menu which is having a UITableviewController class as the Menu . In this ViewController i added a custom view to the Navbar through this code. But when i run in device i get extra space on left and right side of the view . How to remove this?
import UIKit
class SettingsTableController: UITableViewController {
override func viewDidLoad() {
super.viewDidLoad()
let newView = UIView()
newView.frame = CGRect(x:UIApplication.shared.statusBarFrame.origin.x,y:UIApplication.shared.statusBarFrame.height, width: view.frame.size.width + 10, height: self.navigationController!.navigationBar.frame.height)
//#710193
newView.backgroundColor = UIColor.red
let lblTitle = UILabel()
lblTitle.text = " Animals"
lblTitle.textColor = UIColor.white
lblTitle.font = UIFont(name: "HelveticaNeue-Bold", size: 18.0)
lblTitle.frame = newView.bounds
newView.addSubview(lblTitle)
navigationItem.titleView = newView
}
}
so it produces the output as below. I want to remove the pointed out gaps which is shown through red arrows .
You are setting frame but also need to autolayout. So after newView.addSubview(lblTitle) add below codes.
newView.translatesAutoresizingMaskIntoConstraints = false
newView.layoutIfNeeded()
newView.sizeToFit()
newView.translatesAutoresizingMaskIntoConstraints = true
navigationItem.titleView = newView
I have changed some line of code in your code and it is working fine for me
let newView = UIView()
newView.frame = CGRect(x:UIApplication.shared.statusBarFrame.origin.x,y:UIApplication.shared.statusBarFrame.height, width: view.frame.size.width, height: self.navigationController!.navigationBar.frame.height)
//#710193
newView.backgroundColor = UIColor.red
let lblTitle = UILabel()
lblTitle.text = " Animals"
lblTitle.textColor = UIColor.white
lblTitle.font = UIFont(name: "HelveticaNeue-Bold", size: 18.0)
lblTitle.frame = newView.bounds
newView.addSubview(lblTitle)
You are adding newView to titleView of navigationItem instead of adding that to navigationBar of navigationController
self.navigationController?.navigationBar.addSubview(newView)
Try to use auto layout constraint programatically in swift. The link is provided below
Auto Layout in Swift: Writing constraints programmatically
I need to extend my navigation bar height but since Apple made it very hard to change the navigation bar height in iOS 11 I decided I needed to use a custom view which extended the navigation bar without the user noticing.
I've created a custom view to add to the bottom of the navigation bar. I made it red just for the sake of making this question more clear. When the user leaves the view controller and then comes back, the title view custom view is "clipped" by the red view. Why?
I've tried to set clipsToBounds false on the custom title view, but that didn't help. How can I make sure the custom title view always stays on top of everything? Why is it being clipped and overlapped by the little red view (whose main purpose is to "extend" the navigation bar)?
Note: "Monthly Spending" label is part of the title view being clipped.
class ViewController: UIViewController {
let customTitleView = CustomTitleView()
let navigationBarExtensionView: UIView = {
let view = UIView()
view.backgroundColor = .red
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
override func viewDidLoad() {
super.viewDidLoad()
setupAdditionalGradientView()
navigationItem.titleView = customTitleView
}
internal func setupAdditionalGradientView() {
view.addSubview(navigationBarExtensionView)
navigationBarExtensionView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
navigationBarExtensionView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
navigationBarExtensionView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
navigationBarExtensionView.heightAnchor.constraint(equalToConstant: 18).isActive = true
// Hide pixel shadow between nav bar and red bar
navigationController?.navigationBar.shadowImage = UIImage()
navigationController?.navigationBar.layer.shadowRadius = 0
navigationController?.navigationBar.layer.shadowOffset = CGSize(width: 0, height: 0)
}
}
Custom title view:
import UIKit
class CustomTitleView: UIView {
let primaryLabel: UILabel = {
let label = UILabel()
label.text = "$10,675.00"
label.font = UIFont.systemFont(ofSize: 27.99, weight: .medium)
label.textColor = .white
label.textAlignment = .center
return label
}()
let secondaryLabel: UILabel = {
let label = UILabel()
label.text = "Monthly Spending"
label.textColor = .white
label.textAlignment = .center
label.font = UIFont.systemFont(ofSize: 10, weight: .medium)
return label
}()
let stackView: UIStackView = {
let stackView = UIStackView()
stackView.axis = .vertical
stackView.distribution = .fillProportionally
stackView.alignment = .center
stackView.translatesAutoresizingMaskIntoConstraints = false
return stackView
}()
override init(frame: CGRect) {
super.init(frame: frame)
setupStackView()
}
internal func setupStackView() {
addSubview(stackView)
stackView.addArrangedSubview(primaryLabel)
stackView.addArrangedSubview(secondaryLabel)
stackView.centerXAnchor.constraint(equalTo: centerXAnchor).isActive = true
stackView.centerYAnchor.constraint(equalTo: centerYAnchor, constant: 10).isActive = true
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
}
In iOS 11, a custom bar button item view such as your titleView is sized from the inside out using constraints. Thus, you need constraints to size the view correctly. You are not providing any constraints, so the runtime doesn't know how to size the title view.
However, I would suggest that you just give up on the dubious idea of extending your UINavigationItem's custom view downward below the outside of the navigation bar, and instead, just show the words Monthly Spending in your view controller's view.
How do I dynamically resize my navigation bar title while in iOS 11's Large Title mode?
Previously you could define your own UILabel as the titleView and have it resize. All it does now is add another titleView on top.
override func viewDidLoad() {
super.viewDidLoad()
self.title = "A very long title. Really long. Dont truncate me though. I want everyone to see me."
let frame = CGRect(x: 0, y: 0, width: 200, height: 40)
let tlabel = UILabel(frame: frame)
tlabel.text = self.title
tlabel.textColor = UIColor.black
tlabel.font = UIFont.boldSystemFont(ofSize: 17)
tlabel.backgroundColor = UIColor.clear
tlabel.adjustsFontSizeToFitWidth = true
tlabel.textAlignment = .center
self.navigationItem.titleView = tlabel
navigationController?.navigationBar.prefersLargeTitles = true
navigationItem.largeTitleDisplayMode = .automatic
}
I'm trying to put the temperature in my app. I would like to show it like that:
But all I'm able to get is that:
I have tried to use this code to align the two label on top:
#IBDesignable class TopAlignedLabel: UILabel {
override func drawText(in rect: CGRect) {
if let stringText = text {
let stringTextAsNSString = stringText as NSString
let labelStringSize = stringTextAsNSString.boundingRect(with: CGSize(width: self.frame.width,height: CGFloat.greatestFiniteMagnitude), options: NSStringDrawingOptions.usesLineFragmentOrigin, attributes: [NSFontAttributeName: font], context: nil).size
super.drawText(in: CGRect(x:0,y: 0,width: self.frame.width, height:ceil(labelStringSize.height)))
} else {
super.drawText(in: rect)
}
}
}
It worked on for the '°C' but it's not working for the 25. Can someone help me find a solution to my problem ?
A very simple way to solve this is with attributed strings:
let tempText = "25˚C"
let baseFont = UIFont.systemFont(ofSize: 23.0)!
let superscriptFont = UIFont.systemFont(ofSize: 15.0)!
let attrStr = NSMutableAttributedString(string: tempText, attributes: [NSFontAttributeName: baseFont])
attrStr.addAttributes([NSFontAttributeName: superscriptFont, NSBaselineOffsetAttributeName: 10.0], range: NSMakeRange(2,2))
myLabel.attributedText = attrStr
You can keep adding more different attributes on any range you want by using the addAttributes method.
A font has multiple characteristics, including Ascender, Descender, CapHeight, etc... So what your code gets is not a way to align the character glyphs flush with the top of the label frame, but rather it aligns the Font bounding box to the top of the frame.
Calculating the offset between font metrics might give you what you're after. Here is one example (you can run it in a Playground page):
import UIKit
import PlaygroundSupport
class TestViewController : UIViewController {
let labelOne: UILabel = {
let label = UILabel()
label.font = UIFont.systemFont(ofSize: 60.0)
label.text = "25"
label.backgroundColor = .cyan
label.translatesAutoresizingMaskIntoConstraints = false
label.numberOfLines = 1
label.textAlignment = .right
return label
}()
let labelTwo: UILabel = {
let label = UILabel()
label.font = UIFont.systemFont(ofSize: 24.0)
label.text = "°C"
label.backgroundColor = .cyan
label.translatesAutoresizingMaskIntoConstraints = false
label.numberOfLines = 1
return label
}()
override func viewDidLoad() {
super.viewDidLoad()
// add the scroll view to self.view
self.view.addSubview(labelOne)
self.view.addSubview(labelTwo)
// constrain the scroll view to 8-pts on each side
labelOne.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 8.0).isActive = true
labelOne.topAnchor.constraint(equalTo: view.topAnchor, constant: 8.0).isActive = true
labelTwo.leftAnchor.constraint(equalTo: labelOne.rightAnchor, constant: 2.0).isActive = true
if let f1 = labelOne.font, let f2 = labelTwo.font {
let offset = (f1.ascender - f1.capHeight) - (f2.ascender - f2.capHeight)
labelTwo.topAnchor.constraint(equalTo: labelOne.topAnchor, constant: offset).isActive = true
}
}
}
let vc = TestViewController()
vc.view.backgroundColor = .yellow
PlaygroundPage.current.liveView = vc
And this is the result:
Depending on what font you are actually using, though, that may not be good enough. If so, you'll want to look into CoreText / CTFont / CTFontGetGlyphsForCharacters() / etc.
navigationItem.hidesBackButton = true
navigationItem.leftBarButtonItem = nil
head = UIView()
head.frame = CGRectMake(0, 0, 200, 44)
head.frame.origin.x = CGFloat(0)
navigationItem.titleView = head
I attempt to align the titleView to the left, but it still remains in the middle.
Try this:
let title = UILabel()
title.text = "TITLE"
let spacer = UIView()
let constraint = spacer.widthAnchor.constraint(greaterThanOrEqualToConstant: CGFloat.greatestFiniteMagnitude)
constraint.isActive = true
constraint.priority = .defaultLow
let stack = UIStackView(arrangedSubviews: [title, spacer])
stack.axis = .horizontal
navigationItem.titleView = stack
The idea is that main view (in this case title) will take all the space it needs and spacer view will take all the free space left.
I figured it out.
I just need to set my custom UIView as the leftBarButtonItem.
I had a similar requirement of adding the Title along with the subtitle to the left of the navbar. I couldn't achieve it with a TitleView since it cannot be aligned left.
So I took #TIMEZ and #Wain's answers, along with responses from the thread here and added a complete answer, in case it helps anyone :
let titleLabel = UILabel()
titleLabel.text = "Pillars"
titleLabel.textAlignment = .center
titleLabel.font = .preferredFont(forTextStyle: UIFont.TextStyle.headline)
let subtitleLabel = UILabel()
subtitleLabel.text = "How did you do today?"
subtitleLabel.textAlignment = .center
subtitleLabel.font = .preferredFont(forTextStyle: UIFont.TextStyle.subheadline)
let stackView = UIStackView(arrangedSubviews: [titleLabel, subtitleLabel])
stackView.distribution = .equalSpacing
stackView.alignment = .leading
stackView.axis = .vertical
let customTitles = UIBarButtonItem.init(customView: stackView)
self.navigationItem.leftBarButtonItems = [customTitles]
You can't align a title view to the left. You can create a title view and add a subview positioned to its left. If you're looking to display in place of the back button then you should be using a bar button item instead of title view.
I don't think Apple wants you to do that. Navigation bars have a pretty specific purpose that often involves having something else in the top left corner like a Back button. You might be better off making a custom UIView or UIToolbar that looks like the navigation bar.
If it's a custom UIView, override intrinsicContentSize and return
CGSize(width: .greatestFiniteMagnitude, height: UIView.noIntrinsicMetric)
This will stretch the view to the entire width between left and right bar button items.
You can constraint the titleView to the navigationBars leftAnchor.
private func setupNavigationBarTitleView() {
let titleView = YourCustomTitleView()
navigationBarTitleView = titleView
navigationBarTitleView?.translatesAutoresizingMaskIntoConstraints = false
navigationItem.titleView = navigationBarTitleView
if let navigationBar = navigationController?.navigationBar {
NSLayoutConstraint.activate([
titleView.leadingAnchor.constraint(equalTo: navigationBar.leadingAnchor, constant: 16),
titleView.heightAnchor.constraint(equalToConstant: 36)
])
}
}
The simplest solution is to add low priority constraint for title width.
let titleLabel = UILabel()
titleLabel.textAlignment = .left
...
let c = titleLabe.widthAnchor.constraint(equalToConstant: 10000)
c.priority = .required - 1
c.isActive = true
navigationItem.titleView = titleLabel
Hey guys after trying most of the solutions above. I found that most of em still did not meet my prod requirements. Here is a solution I came up with after trying out different solutions.
func setLeftAlignTitleView(font: UIFont, text: String, textColor: UIColor) {
guard let navFrame = navigationController?.navigationBar.frame else{
return
}
let parentView = UIView(frame: CGRect(x: 0, y: 0, width: navFrame.width*3, height: navFrame.height))
self.navigationItem.titleView = parentView
let label = UILabel(frame: .init(x: parentView.frame.minX, y: parentView.frame.minY, width: parentView.frame.width, height: parentView.frame.height))
label.backgroundColor = .clear
label.numberOfLines = 2
label.font = font
label.textAlignment = .left
label.textColor = textColor
label.text = text
parentView.addSubview(label)
}
let navLabel = UILabel(frame: CGRect(x: 0, y: 0, width: view.frame.width - 32, height: view.frame.height))
navLabel.text = "Hi, \(CurrentUser.firstName)"
navLabel.textColor = UIColor.white
navLabel.font = UIFont.systemFont(ofSize: 20)
navigationItem.titleView = navLabel