UIAppearance定製UI元素

import UIKit

class ViewController: UIViewController {
    
    @IBOutlet weak var button: UIButton!
    @IBOutlet weak var progressView: UIProgressView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.button.tintColor = UIColor.red
        
        //tint color 可以改變大部分控件的顏色，但有些則不行
        self.progressView.progressTintColor = UIColor.red
    }


}

Demo 5 鏈接