I am trying to display a multi-line titleView in my app. Here is my code to set the titleView.
self.titleView = TitleView(frame: CGRect(origin: CGPoint.zero, size: CGSize(width: self.tableView.frame.width, height: 80)), title: "NEWS", subtitle: Date.dateAsStringForNavBarSubTitle())
self.titleView.backgroundColor = UIColor.red
self.navigationItem.titleView = self.titleView
The part of the implementation of TitleView is shown below:
private func setupUI() {
let label = UILabel(frame: CGRect(origin: CGPoint.zero, size: CGSize(width: self.frame.width, height: self.frame.height)))
label.numberOfLines = 2
label.text = "\(self.title)\n\(self.subtitle)"
self.addSubview(label)
}
The label comes out to be outside the parent view.
Should I just use a UILabel instead of putting it in UIView?
I can see that you are adding label subview into title view. Instead, you can try this in your viewcontroller's viewDidLoad() method.
For Swift 4
let label = UILabel(frame: CGRect(x: 0.0, y: 0.0, width: UIScreen.main.bounds.width, height: 44.0))
label.backgroundColor = .red
label.numberOfLines = 2
label.textAlignment = .left
label.text = "\(self.title)\n\(self.subtitle)"
self.navigationItem.titleView = label
For more information please refer this link UINavigationBar multi-line title
Related
I'm trying to implement custom titleView for navigation controller with "title" and "description" labels. If I placed this titleView on first VC, it looks good. If I push second VC into navigation stack and pop it, location of the titleView is changed.
titleView's constraints:
titleLabel.translatesAutoresizingMaskIntoConstraints = false
descriptionLabel.translatesAutoresizingMaskIntoConstraints = false
titleLabel.widthAnchor.constraint(equalTo: widthAnchor).isActive = true
descriptionLabel.widthAnchor.constraint(equalTo: titleLabel.widthAnchor).isActive = true
titleLabel.topAnchor.constraint(equalTo: topAnchor).isActive = true
descriptionLabel.bottomAnchor.constraint(equalTo: bottomAnchor, constant: 2.0).isActive = true
In viewDidLoad of VC I use follow code to insert titleView:
navigationItem.titleView = BarTitleView()
navigationItem.titleView?.bounds = CGRect(x: 0, y: 0, width: view.bounds.width, height: 44)
navigationItem.titleView?.updateConstraints()
I tried to insert follow lines into viewWillAppear (second VC has different bar buttons and it can be root of problem), but nothing changes
navigationItem.titleView?.bounds = CGRect(x: 0, y: 0, width: view.bounds.width, height: 44)
navigationItem.titleView?.updateConstraints()
How can I fixed this issue?
I have created a Title and Subtitle in the Navigation bar without the need for Interface Builder and constraint modification.
My Function to create the title view looks as follows:
class func setTitle(title:String, subtitle:String) -> UIView {
let titleLabel = UILabel(frame: CGRect(x: 0, y: -8, width: 0, height: 0))
titleLabel.backgroundColor = UIColor.clear
titleLabel.textColor = UIColor.white
titleLabel.font = UIFont.boldSystemFont(ofSize: 17)
titleLabel.text = title
titleLabel.sizeToFit()
let subtitleLabel = UILabel(frame: CGRect(x: 0, y: 12, width: 0, height: 0))
subtitleLabel.backgroundColor = UIColor.clear
subtitleLabel.textColor = UIColor.white
subtitleLabel.font = UIFont.systemFont(ofSize: 12)
subtitleLabel.text = subtitle
subtitleLabel.sizeToFit()
// Fix incorrect width bug
if (subtitleLabel.frame.size.width > titleLabel.frame.size.width) {
var titleFrame = titleLabel.frame
titleFrame.size.width = subtitleLabel.frame.size.width
titleLabel.frame = titleFrame
titleLabel.textAlignment = .center
}
let titleView = UIView(frame: CGRect(x: 0, y: 0, width: titleLabel.frame.size.width, height: titleLabel.frame.size.height))
titleView.addSubview(titleLabel)
titleView.addSubview(subtitleLabel)
let widthDiff = subtitleLabel.frame.size.width - titleLabel.frame.size.width
if widthDiff < 0 {
let newX = widthDiff / 2
subtitleLabel.frame.origin.x = abs(newX)
} else {
let newX = widthDiff / 2
titleLabel.frame.origin.x = newX
}
return titleView
}
Then to use the title view in any view controller I just call this line:
self.navigationItem.titleView = Functions.Views.setTitle(title: "Title String", subtitle: "Subtitle String")
I have a UINavigationBar with a title of variable length. To make sure the title fits without being truncated I've implemented the following code in my viewDidLoad():
let titleLabel = UILabel(frame: CGRect(x: 0, y: 0, width: 200, height: 40))
titleLabel.text = "\(petsName)'s Day"
titleLabel.font = UIFont.systemFont(ofSize: 30)
titleLabel.backgroundColor = UIColor.clear
titleLabel.textColor = UIColor.white
titleLabel.adjustsFontSizeToFitWidth = true
titleLabel.minimumScaleFactor = 0.5
self.navBar.topItem?.titleView = titleLabel
However, because I have a bar button item, the title is being moved over to the left:
Is there any way to implement the code above but keep the text center aligned within the navigation bar?
Please help me to resolve this issue
Try this.. may be worked
var view = UIView(frame: CGRect(x: 0, y: 0, width: 150, height: 40))
var label = UILabel(frame: CGRect(x: 0, y: 0, width: 150, height: 40))
label.text = "Joys Day"
label.textAlignment = .center
label.font = UIFont.systemFont(ofSize: 30)
view.addSubview(label)
navigationItem?.titleView = view
Change titleLabel width to device width and align it to center. Try this:
let deviceWidth = UIScreen.main.bounds.size.width
let titleLabel = UILabel(frame: CGRect(x: 0, y: 0, width: deviceWidth, height: 40))
titleLabel.text = "My Test Title"
titleLabel.font = UIFont.systemFont(ofSize: 20)
titleLabel.backgroundColor = UIColor.clear
titleLabel.textColor = UIColor.white
titleLabel.adjustsFontSizeToFitWidth = true
titleLabel.minimumScaleFactor = 0.5
titleLabel.textAlignment = .center
self.navigationItem.titleView = titleLabel
Output:
I'm populating my scrollview in a for loop and trying to place a UILabel on top of each inserted element. However, the label won't center horizontally for some reason even though I'm setting its centerXAnchor to be equal to each element's centerXAnchor. Here's a picture with the label and element's borders shown:
As seen, the label I'm inserting isn't being centered horizontally with each element in the scrollview for some reason. Here's my for loop where I populate the scrollview:
for i in 0..<petsDict.count {
let imageView = UIImageView()
imageView.image = petsDict[i]
imageView.contentMode = .scaleAspectFit
let xPos = self.view.frame.width * CGFloat(i)
imageView.frame = CGRect(x: xPos - CGFloat(20*i), y: 0, width: self.mainScrollView.frame.width, height: self.mainScrollView.frame.height)
let label = UILabel(frame: CGRect(x: 0, y: -20, width: 200, height: 40))
label.text = "Joy"
label.textAlignment = .center
imageView.addSubview(label)
label.font = UIFont(name: "SFUIText-Regular", size: 20)!
label.sizeToFit()
mainScrollView.contentSize.width = mainScrollView.frame.width * CGFloat(i + 1)
mainScrollView.addSubview(imageView)
label.centerXAnchor.constraint(equalTo: imageView.centerXAnchor).isActive = true
label.bottomAnchor.constraint(equalTo: imageView.topAnchor).isActive = true
}
Can anybody help me understand why my x centering isn't working properly?
Try to remove label.sizeToFit(), this function resizes your labels.
for i in 0..<petsDict.count {
let imageView = UIImageView()
imageView.image = petsDict[i]
imageView.contentMode = .scaleAspectFit
let xPos = self.view.frame.width * CGFloat(i)
imageView.frame = CGRect(x: xPos - CGFloat(20*i), y: 0, width: self.mainScrollView.frame.width, height: self.mainScrollView.frame.height)
let label = UILabel(frame: CGRect(x: 0, y: -20, width: self.mainScrollView.frame.width, height: 20))
label.text = "Joy"
label.textAlignment = .center
imageView.addSubview(label)
label.font = UIFont(name: "SFUIText-Regular", size: 20)!
mainScrollView.contentSize.width = mainScrollView.frame.width * CGFloat(i + 1)
mainScrollView.addSubview(imageView)
label.centerXAnchor.constraint(equalTo: imageView.centerXAnchor).isActive = true
label.bottomAnchor.constraint(equalTo: imageView.topAnchor).isActive = true
}
Try this code
Give width to label same as your imageview width and remove sizeToFit and anchor. You just need to add then textAlignment which you have already added.
I have ViewController and inside it UICollectionView, I'm trying to add UILable to UICollectionView programmatically :
let Label: UILabel = {
let label = UILabel()
label.text = "Sample Text Here"
label.textAlignment = .center
label.textColor = UIColor(white: 0.4, alpha: 0.4)
label.font = UIFont.systemFont(ofSize: 20)
return label
}()
override func viewDidLoad() {
super.viewDidLoad()
Label.translatesAutoresizingMaskIntoConstraints = false
Label.frame = CGRect(x: 0, y: 40, width: view.frame.width, height: 20)
collectionView.addSubview(Label)
}
when I tried to change the y value it's the same
when I tried to add it like this : view.addSubView(Label) didn't appear at all.
note: the label should appear if there's no data to populate the cells
It works..
override func viewDidLoad() {
super.viewDidLoad()
let collectionView = UICollectionView(frame: CGRect(x: 0, y: 0, width: 300, height: 300), collectionViewLayout: UICollectionViewFlowLayout())
self.view.addSubview(collectionView)
collectionView.backgroundColor = UIColor.red
let label = UILabel()
label.text = "Sample Text Here"
label.textAlignment = .center
label.textColor = UIColor(white: 0.4, alpha: 0.4)
label.font = UIFont.systemFont(ofSize: 20)
label.frame = CGRect(x: 0, y: 100, width: view.frame.width, height: 20)
collectionView.addSubview(label)
}
Be careful with adding labels directly to the collectionview, though.
You could create a uiview and add both label to it and collection (with the appropriate collection view layout of course). Use collection view only for displaying cells and add anything to the cell.contentView if you wish
Thanks.
Im starting to dabble a bit with swift and ran into a weird behaviour and was wondering if someone could shed some light on why. Im trying to add a UILabel to a UIView and position it in the centre of the UIView. Theoretically this can be achieved with the following.
self.titleContainer = UIView(frame: CGRect(x: self.view.bounds.origin.x, y: self.view.bounds.origin.y
+ 20.0, width: self.view.bounds.width, height: (self.view.bounds.height * cSixth) - 20.0))
self.titleContainer.backgroundColor = UIColor.blackColor()
self.view.addSubview(titleContainer)
self.titleLabel = UILabel()
self.titleLabel.text = "Naughts and Crosses"
self.titleLabel.textColor = UIColor.whiteColor()
self.titleLabel.font = UIFont(name: "Helvetica", size: 10)
self.titleLabel.sizeToFit()
self.titleLabel.center = titleContainer.center
titleContainer.addSubview(self.titleLabel)
however this doesn't seem to take in the top margin. however the next block of code work and positions the label in the center.
self.titleContainer = UIView(frame: CGRect(x: self.view.bounds.origin.x, y: self.view.bounds.origin.y
+ 20.0, width: self.view.bounds.width, height: (self.view.bounds.height * cSixth) - 20.0))
self.titleContainer.backgroundColor = UIColor.blackColor()
self.view.addSubview(titleContainer)
self.titleLabel = UILabel()
self.titleLabel.text = "Naughts and Crosses"
self.titleLabel.textColor = UIColor.whiteColor()
self.titleLabel.font = UIFont(name: "Helvetica", size: 10)
self.titleLabel.sizeToFit()
self.titleLabel.center = CGPointMake(titleContainer.bounds.midX, titleContainer.bounds.midY)
titleContainer.addSubview(self.titleLabel)
Any ideas?
Thanks
Alec
I think you are mixing coordinate systems. self.titleLabel.center is a point inside titleContainer and titleContainer.center is a point inside [titleContainer superview].
The differences are explained in the View Programming Guide -> View and Window Architecture -> View Geometry and Coordinate Systems -> The Relationship of the Frame, Bounds, and Center Properties.