I have some labels which I want to adjust their height to the text, this is the code I wrote for this now
func heightForView(text:String, font:UIFont, width:CGFloat) -> CGFloat{
let label:UILabel = UILabel(frame: CGRectMake(0, 0, width, CGFloat.max))
label.numberOfLines = 0
label.lineBreakMode = NSLineBreakMode.ByWordWrapping
label.font = font
label.text = text
label.sizeToFit()
return label.frame.height
}
EDIT:
The issue was not in this piece of code, so my fix is in the question itself. It might still be useful for others!
The Swift 4.1 extension method to calculate label height:
extension UILabel {
func heightForLabel(text:String, font:UIFont, width:CGFloat) -> CGFloat {
let label:UILabel = UILabel(frame: CGRect(x: 0, y: 0, width: width, height: CGFloat.greatestFiniteMagnitude))
label.numberOfLines = 0
label.lineBreakMode = NSLineBreakMode.byWordWrapping
label.font = font
label.text = text
label.sizeToFit()
return label.frame.height
}
}
Here is how to calculate the text height in Swift. You can then get the height from the rect and set the constraint height of the label or textView, etc.
let font = UIFont(name: "HelveticaNeue", size: 25)!
let text = "This is some really long text just to test how it works for calculating heights in swift of string sizes. What if I add a couple lines of text?"
let textString = text as NSString
let textAttributes = [NSFontAttributeName: font]
let textRect = textString.boundingRectWithSize(CGSizeMake(320, 2000), options: .UsesLineFragmentOrigin, attributes: textAttributes, context: nil)
Swift 4.0
self.messageLabel = UILabel(frame: CGRect(x: 70, y: 60, width:UIScreen.main.bounds.width - 80, height: 30)
messageLabel.text = message
messageLabel.lineBreakMode = .byWordWrapping //in versions below swift 3 (messageLabel.lineBreakMode = NSLineBreakMode.ByWordWrapping)
messageLabel.numberOfLines = 0 //To write any number of lines within a label scope
messageLabel.textAlignment = .center
messageLabel.textColor = UIColor.white
messageLabel.font = messageLabel.font.withSize(12)
messageLabel.sizeToFit()
Blockquote NSParagraphStyle.LineBreakMode, apply to entire paragraphs, not words within paragraphs.This property is in effect both during normal drawing and in cases where the font size must be reduced to fit the label’s text in its bounding box. This property is set to byTruncatingTail by default.
I create this extension if you want
extension UILabel {
func setSizeFont (sizeFont: CGFloat) {
self.font = UIFont(name: self.font.fontName, size: sizeFont)!
self.sizeToFit()
}
}
Swift 4.0
Instead of calculating the text/label height, I just resize the label after inserting the (dynamic) text.
Assuming that myLabel is the UILabel in question:
let myLabel = UILabel(frame: CGRect(x: 0, y: 0, width: *somewidth*, height: *placeholder, e.g. 20*))
myLabel.numberOfLines = 0
myLabel.lineBreakMode = .byWordWrapping
...
And now comes the fun part:
var myLabelText: String = "" {
didSet {
myLabel.text = myLabelText
myLabel.sizeToFit()
}
}
Just by setting:
label.numberOfLines = 0
The label automatically adjusts its height based upon the amount of text entered.
You can also use sizeThatFits
function.
For example:
label.sizeThatFits(superView.frame.size).height
based on Anorak's answer, I also agree with Zorayr's concern, so I added a couple of lines to remove the UILabel and return only the CGFloat, I don't know if it helps since the original code doesn't add the UIabel, but it doesn't throw error, so I'm using the code below:
func heightForView(text:String, font:UIFont, width:CGFloat) -> CGFloat{
var currHeight:CGFloat!
let label:UILabel = UILabel(frame: CGRectMake(0, 0, width, CGFloat.max))
label.numberOfLines = 0
label.lineBreakMode = NSLineBreakMode.ByWordWrapping
label.font = font
label.text = text
label.sizeToFit()
currHeight = label.frame.height
label.removeFromSuperview()
return currHeight
}
To make label dynamic in swift , don't give height constarint and in storyboard make label number of lines 0 also give bottom constraint and this is the best way i am handling dynamic label as per their content size .
Following on @Anorak answer, i added this extension to String and sent an inset as a parameter, because a lot of times you will need a padding to your text. Anyway, maybe some you will find this usefull.
extension String {
func heightForWithFont(font: UIFont, width: CGFloat, insets: UIEdgeInsets) -> CGFloat {
let label:UILabel = UILabel(frame: CGRectMake(0, 0, width + insets.left + insets.right, CGFloat.max))
label.numberOfLines = 0
label.lineBreakMode = NSLineBreakMode.ByWordWrapping
label.font = font
label.text = self
label.sizeToFit()
return label.frame.height + insets.top + insets.bottom
}
}
just call this method where you need dynamic Height for label
func getHeightforController(view: AnyObject) -> CGFloat {
let tempView: UILabel = view as! UILabel
var context: NSStringDrawingContext = NSStringDrawingContext()
context.minimumScaleFactor = 0.8
var width: CGFloat = tempView.frame.size.width
width = ((UIScreen.mainScreen().bounds.width)/320)*width
let size: CGSize = tempView.text!.boundingRectWithSize(CGSizeMake(width, 2000), options:NSStringDrawingOptions.UsesLineFragmentOrigin, attributes: [NSFontAttributeName: tempView.font], context: context).size as CGSize
return size.height
}
In swift 4.1 and Xcode 9.4.1
Only 3 steps
Step 1)
//To calculate height for label based on text size and width
func heightForView(text:String, font:UIFont, width:CGFloat) -> CGFloat {
let label:UILabel = UILabel(frame: CGRect(x: 0, y: 0, width: width, height: CGFloat.greatestFiniteMagnitude))
label.numberOfLines = 0
label.lineBreakMode = NSLineBreakMode.byWordWrapping
label.font = font
label.text = text
label.sizeToFit()
return label.frame.height
}
Step 2)
//Call this function
let height = heightForView(text: "This is your text", font: UIFont.systemFont(ofSize: 17), width: 300)
print(height)//Output : 41.0
Step 3)
//This is your label
let proNameLbl = UILabel(frame: CGRect(x: 0, y: 20, width: 300, height: height))
proNameLbl.text = "This is your text"
proNameLbl.font = UIFont.systemFont(ofSize: 17)
proNameLbl.numberOfLines = 0
proNameLbl.lineBreakMode = .byWordWrapping
infoView.addSubview(proNameLbl)
I have strong working solution.
in layoutSubviews:
_title.frame = CGRect(x: 0, y: 0, width: bounds.width, height: 0)
_title.sizeToFit()
_title.frame.size = _title.bounds.size
in text setter:
_title.text = newValue
setNeedsLayout()
UPD. of course with this UILabel settings:
_title.lineBreakMode = .ByWordWrapping
_title.numberOfLines = 0
Swift 5, XCode 11 storyboard way. I think this works for iOS 9 and higher. You want for example "Description" label to get the dynamic height, follow the steps:
1) Select description label -> Go to Attributes Inspector (pencil icon), set: Lines: 0 Line Break: Word Wrap
2) Select your UILabel from storyboard and go to Size Inspector (ruler icon), 3) Go down to "Content Compression Resistance Priority to 1 for all other UIView (lables, buttons, imageview, etc) components that are interacting with your label.
For example, I have UIImageView, Title Label, and Description Label vertically in my view. I set Content Compression Resistance Priority to UIImageView and title label to 1 and for description label to 750. This will make a description label to take as much as needed height.
The solution suggested by Anorak as a computed property in an extension for UILabel:
extension UILabel
{
var optimalHeight : CGFloat
{
get
{
let label = UILabel(frame: CGRectMake(0, 0, self.frame.width, CGFloat.max))
label.numberOfLines = 0
label.lineBreakMode = self.lineBreakMode
label.font = self.font
label.text = self.text
label.sizeToFit()
return label.frame.height
}
}
}
Usage:
self.brandModelLabel.frame.size.height = self.brandModelLabel.optimalHeight
If you are using AutoLayout, you can adjust UILabel
height by config UI only.
For iOS8 or above
UILabel
UILabel
from 1 to 0For iOS7
UILabel
Equal
to Greater than or Equal
UILabel
from 1 to 0Your UILabel
will automatically increase height depending on the text
Source: Stackoverflow.com