How to update CustomView width with different devices - ios

Question

I have a custom Button with 2 Labels and Image as shown in below class
import UIKit
#IBDesignable
class CustomButton : UIButton {
let secondLine : UILabel = UILabel()
override func layoutSubviews() {
super.layoutSubviews()
// self.layer.cornerRadius = 10
self.layer.shadowColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.25).cgColor
self.layer.shadowOffset = CGSize(width: 0.0, height: 2.0)
self.layer.shadowOpacity = 1.0
self.layer.masksToBounds = false
}
#IBInspectable var rightLebelText : String?{
didSet {
updateView()
}
}
func updateView(){
if let mytext = rightLebelText {
let firstLine = UILabel(frame: CGRect(x: self.bounds.size.width - 210, y: 0, width: 200, height: 40))
firstLine.text = mytext
firstLine.textAlignment = .right
firstLine.font = UIFont.systemFont(ofSize: 20)
self.addSubview(firstLine)
var imageView : UIImageView
imageView = UIImageView(frame:CGRect(x: 5, y: 10, width: 20, height: 20))
imageView.image = UIImage(named:"arrow.png")
self.addSubview(imageView)
}
}
public func setSecondlabel(title : String){
secondLine.removeFromSuperview()
secondLine.frame = CGRect(x: 50, y: 0, width: 200, height: 40)
secondLine.text = title
secondLine.font = UIFont.boldSystemFont(ofSize: 20)
secondLine.removeFromSuperview()
self.addSubview(secondLine)
}
}
My issue is my view size is not updating on different devices when using
self.bounds.size.width
for the firstLine label as shown in below image its position should be on the custom button right edge

Answer 1

You need to override the layoutSubviews function have the frame of each element examine and update based on updated bounds of the custom view or assign proper layout constraints on each element while adding it.
If you are overriding the UIButton which has already a label and image property, you can use that one as well or create a custom class inherited from UIControl and create required three property as needed. I am adding an example of the custom class with image, title, and detail as shown in the problem.
class CustomButton : UIControl {
let imageView : UIImageView
let titleLabel : UILabel
let detailLabel : UILabel
fileprivate func setup() {
self.detailLabel.textAlignment = .right
self.detailLabel.font = UIFont.systemFont(ofSize: 20)
self.detailLabel.textColor = UIColor.black
self.titleLabel.font = UIFont.boldSystemFont(ofSize: 20)
self.titleLabel.textColor = UIColor.black
self.backgroundColor = UIColor.white
self.addSubview(self.imageView)
self.addSubview(self.titleLabel)
self.addSubview(self.detailLabel)
}
override init(frame: CGRect) {
self.imageView = UIImageView(frame: .zero)
self.titleLabel = UILabel(frame: .zero)
self.detailLabel = UILabel(frame: .zero)
super.init(frame: frame)
self.setup()
}
required init?(coder aDecoder: NSCoder) {
self.imageView = UIImageView(frame: .zero)
self.titleLabel = UILabel(frame: .zero)
self.detailLabel = UILabel(frame: .zero)
super.init(coder: aDecoder)
self.setup()
}
override func layoutSubviews() {
super.layoutSubviews()
self.imageView.frame = CGRect(x: 5.0, y: self.bounds.midY - 10.0, width: 20.0, height: 20.0)
//You can make this width dynamic if you want to calculate width of text using self.detailLabel.text
var width : CGFloat = 200.0
self.titleLabel.frame = CGRect(x: self.imageView.frame.maxX + 5.0, y: self.bounds.minY, width: 200.0, height: self.bounds.height)
//Give the remaining space to the second label
width = self.bounds.width - (self.titleLabel.frame.maxX + 15.0)
self.detailLabel.frame = CGRect(x: self.titleLabel.frame.maxX + 5.0, y: self.bounds.minY, width: width, height: self.bounds.height)
}
}