1. Border in Label
This example to set a border around UILabel type.

label.layer.borderColor = UIColor.green.cgColor
label.layer.borderWidht = 2.0

2. How to set Corner Radius use KeyPath

you can set in bar Identity inspector   in file XIB or NIB

look in Identity inspector



set in Attributes inspector off to on



must set in extension

extension UILabel {
    @IBInspectable
    var selfCornerRadius: Bool {
        get {
            return false
        } set {
            if newValue {
                self.layer.cornerRadius = self.frame.size.height / 2
            } else {
                self.layer.cornerRadius = 0.0
            }
        }
    }
}

- layer corner radius




3. Convert URL To HTML

   func webToHtml() {
        let testUrl = URL(string: "http://youURls.html")
        var html = NSString()
        do {
            html = try NSString(contentsOf: testUrl!, encoding: String.Encoding.isoLatin1.rawValue)
            print(html)
            self.label.attributedText = "\(html)".convertHtml() // check converhtml in 9 note may

     } catch {
            print(error)
        }
    }

4. Filter by Device type

   if UIDevice().userInterfaceIdiom == .phone {

    switch UIScreen.main.nativeBounds.height {

        case 1136:

            print("iPhone 5 or 5S or 5C")



        case 1334:

            print("iPhone 6/6S/7/8")



        case 1920, 2208:

            print("iPhone 6+/6S+/7+/8+")



        case 2436:

            print("iPhone X, XS")



        case 2688:

            print("iPhone XS Max")



        case 1792:

            print("iPhone XR")



        default:

            print("Unknown")

        }

    }

5. Error in debug area 'Could not load NIB in bundle'


6. Realm append data to a type List<t>

source from: https://stackoverflow.com/questions/33726606/realm-append-data-to-a-type-listt
and this my complete solution

var listArray: List<DataArray>?
var appendData: [DataArray] = []

public override func viewDidLoad() {
        super.viewDidLoad()
        listArray = REALM.all(DataArray.self).first?.options
        
        for list in listArray! {
            appendData.append(manual)
        }
      
        
    }

7. SegmentedControl Set CornerRadius

self.segmentedControl.layer.cornerRadius = 15
self.segmentedControl.layer.borderColor = UIColor.white.cgColor
self.segmentedControl.layer.borderWidth = 1
self.segmentedControl.layer.masksToBounds = true

Or



8. SegmentedControl Custom Fonts size

In Swift 4.2,  NSFontAttributeName has been replaced with NSAttributedString.Key.font

segmentedControl.setTitleTextAttributes([NSAttributedString.Key.font: 
UIFont.systemFont(ofSize: 16)], for: .normal)

https://stackoverflow.com/a/50710084/8366535


9. Capital in UILabel in first word

Swift apply .uppercaseString to only the first letter of a string

extension String {
    func capitalizingFirstLetter() -> String {
      return prefix(1).uppercased() + self.lowercased().dropFirst()
    }

    mutating func capitalizeFirstLetter() {
      self = self.capitalizingFirstLetter()
    }
}

How to use:

let inString = "data in"
inString. capitalizingFirstLetter  // Data in

https://stackoverflow.com/a/26306372/8366535