How do I make text labels scale the font size with different Apple product screens?

Question

This is for ios dev with swift. I have a very simplistic layout:

link1 (not enough rep to actually post the pic)

All I\'m trying to do is make sure that \"re

Answer 1

Hien,

Here is a super post about detecting the device/screen size.

How to detect iPhone 5 (widescreen devices)?

This is my favourite suggestion on it, please click on it and thank the real author!

Add a 'New Swift File'-> AppDelegateEx.swift

add an extension to AppDelegate

import UIKit
extension AppDelegate {
    class func isIPhone5 () -> Bool{
         return max(UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height) == 568.0
    }
    class func isIPhone6 () -> Bool {
        return max(UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height) == 667.0
    }
    class func isIPhone6Plus () -> Bool {
        return max(UIScreen.mainScreen().bounds.width,     UIScreen.mainScreen().bounds.height) == 736.0
    }  
}

usage:

if AppDelegate.isIPhone5() {
    collectionViewTopConstraint.constant = 2
}else if AppDelegate.isIPhone6() {
    collectionViewTopConstraint.constant = 20
}

Combine it with setting the font in your application, which you surely must be doing right now?

variable.font = UIFont(name: "Palatino", size: 24)