How to implement UILabel line spacing using xib? - ios

Question

I want to align a UILabel's text vertically with line spacing via xib in iOS, for example:
hello,
how are
you?
Please help me.

Answer 1

Yes it is possible to adjust line spacing via xib. Click on UIlabel on xib,then change ‘text’ property type to ’Attributed’,then go through following images. Then enter new line(press ctrl-return shortcut key)and keep cursor in between two lines then adjust ‘line’ property and ‘Max Height’ property you want. My UILael text is "Hello,how are you?"

Answer 2

Create this simple UILabel subclass:
#interface CustomLabel : UILabel
#property (assign, nonatomic) CGFloat myLineSpacing;
#end
#implementation CustomLabel
- (void)setMyLineSpacing:(CGFloat)myLineSpacing {
_myLineSpacing = myLineSpacing;
self.text = self.text;
}
- (void)setText:(NSString *)text {
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineSpacing = _myLineSpacing;
paragraphStyle.alignment = self.textAlignment;
NSDictionary *attributes = #{NSParagraphStyleAttributeName: paragraphStyle};
NSAttributedString *attributedText = [[NSAttributedString alloc] initWithString:text
attributes:attributes];
self.attributedText = attributedText;
}
Set myLineSpacing property value with IB.
Still you cannot preview in IB, but line spacing value is in xib!
You can set label.text in your code without caring about line spacing.
Note:
don't make property name "lineSpacing".
UILabel do have undocumented lineSpacing property, and overriding that breaks something.

Answer 3

*From Interface Builder:**
Programmatically:
SWift 4
Using label extension
extension UILabel {
// Pass value for any one of both parameters and see result
func setLineSpacing(lineSpacing: CGFloat = 0.0, lineHeightMultiple: CGFloat = 0.0) {
guard let labelText = self.text else { return }
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = lineSpacing
paragraphStyle.lineHeightMultiple = lineHeightMultiple
let attributedString:NSMutableAttributedString
if let labelattributedText = self.attributedText {
attributedString = NSMutableAttributedString(attributedString: labelattributedText)
} else {
attributedString = NSMutableAttributedString(string: labelText)
}
// Line spacing attribute
attributedString.addAttribute(NSAttributedStringKey.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attributedString.length))
self.attributedText = attributedString
}
}
Now call extension function
let label = UILabel()
let stringValue = "How\nto\nimplement\nUILabel\nline\nspacing\nusing\nxib?"
// Pass value for any one argument - lineSpacing or lineHeightMultiple
label.setLineSpacing(lineSpacing: 2.0) . // try values 1.0 to 5.0
// or try lineHeightMultiple
//label.setLineSpacing(lineHeightMultiple = 2.0) // try values 0.5 to 2.0
Or using label instance (Just copy & execute this code to see result)
let label = UILabel()
let stringValue = "How\nto\nimplement\nUILabel\nline\nspacing\nusing\nxib?"
let attrString = NSMutableAttributedString(string: stringValue)
var style = NSMutableParagraphStyle()
style.lineSpacing = 24 // change line spacing between paragraph like 36 or 48
style.minimumLineHeight = 20 // change line spacing between each line like 30 or 40
// Line spacing attribute
attrString.addAttribute(NSAttributedStringKey.paragraphStyle, value: style, range: NSRange(location: 0, length: stringValue.characters.count))
// Character spacing attribute
attrString.addAttribute(NSAttributedStringKey.kern, value: 2, range: NSMakeRange(0, attrString.length))
label.attributedText = attrString

Answer 4

Type it exactly the same way you desire in any text editor like TextEdit etc and then paste in the text section of your label in xib.
But make sure height of your label is more to fit the content and also increase the number of lines. For this case it can be 3 or more.