How to default UILabel Font and Size using Swift

Question

I find UISegmentedControl change font and size like this :

UISegmentedControl.appearance().setTitleTextAttributes(myFontAttribute as [NSObject : AnyObject] , forState: .Normal)

but UILabel have no this method

I want to do like

UILabel.appearance().setAttributed(myFontAttribute)

I don't want to change UILabel font in StoryBoard

I want to using program to do this (because my app is done, but only font should change to bigger and other font)

What should I do ?

you just want to change font and size or attributed string ? — Moin Shirazi, Mar 31 '16 at 04:23
`UIAppearance` only allows you to set properties that are flagged with `UI_APPEARANCE_SELECTOR` in the Objective-C header file. Since `UILabel` has no such properties, it cannot be styled with `UIAppearance` See also [this question](http://stackoverflow.com/questions/11839044/how-do-i-apply-uiappearance-proxy-properties-to-uilabel), which is essentially the exactly the same question, but using Objective-C — David Berry, Mar 31 '16 at 05:32

score 35 · Accepted Answer · edited Oct 07 '17 at 22:59

35

First you need to add extension to UILabel :

extension UILabel{
    var defaultFont: UIFont? {
        get { return self.font }
        set { self.font = newValue }
    }
}

Second use appearance to set it:

    UILabel.appearance().defaultFont = UIFont.systemFont(ofSize: 25)

Hope it helps.

edited Oct 07 '17 at 22:59

Durul Dalkanat

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answered Mar 31 '16 at 04:25

Oleg Sherman

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3

this has been invaluable. Here's how I applied it. http://stackoverflow.com/questions/41138367/how-do-i-rewrite-a-uilabel-after-it-is-added-to-a-subview – Greg Dec 15 '16 at 11:02

score 12 · Answer 2 · answered Mar 31 '16 at 04:24

12

You can change the label font programmatically like this

label.font = UIFont(name: label.font.fontName, size: 14)

Change font size only with bold

label.font = UIFont.boldSystemFontOfSize(18)

Change font size only

label.font = label.font.fontWithSize(14)

answered Mar 31 '16 at 04:24

Rashwan L

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this idea not good for me, because it need IBOutlet ... I don't want to using IBOutlet. Because I have a lot UILable in my app. – nine9 Mar 31 '16 at 05:04

Kiran Jadhav · Answer 3 · 2017-08-01T11:02:40.193

2

if you want to change the size of font, used below lines of code :

for Swift 3 :

label.font = label.font.withSize(20)

edited Aug 01 '17 at 11:02

answered Jul 29 '17 at 11:33

Kiran Jadhav

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score 0 · Answer 4 · answered Mar 31 '16 at 05:09

0

You can use this simple code in swift

myLabel.attributedText = NSMutableAttributedString(string: myLabel.text!, attributes: [NSFontAttributeName:UIFont(name: "YourFont", size: 12), NSForegroundColorAttributeName: UIColor.whiteColor()])

answered Mar 31 '16 at 05:09

Moin Shirazi

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How to default UILabel Font and Size using Swift

4 Answers4

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