swift - 高效地修改多个 UIButton

Question

在我的 View 中有 3 个按钮，我正在尝试为其添加阴影。这是我的代码:

@IBOutlet weak var button1: UIButton!
@IBOutlet weak var button2: UIButton!
@IBOutlet weak var button3: UIButton!


override func viewDidLoad() {
    super.viewDidLoad()

    button1.layer.shadowColor = UIColor.black.cgColor
    button1.layer.shadowOpacity = 1
    button1.layer.shadowOffset = CGSize(width: 5, height: 5)
    button1.layer.shadowRadius = 0
    button2.layer.shadowColor = UIColor.black.cgColor
    button2.layer.shadowOpacity = 1
    button2.layer.shadowOffset = CGSize(width: 5, height: 5)
    button2.layer.shadowRadius = 0
    button3.layer.shadowColor = UIColor.black.cgColor
    button3.layer.shadowOpacity = 1
    button3.layer.shadowOffset = CGSize(width: 5, height: 5)
    button3.layer.shadowRadius = 0 
}

是否有更有效的方法来对多个按钮执行此类操作，而不是为每个按钮重复相同的代码？

Answer 1

将按钮添加到 Interface Builder 中的 socket 集合

@IBOutlet var buttonsWithShadow: [UIButton]!

现在您可以遍历集合，并以相同的方式配置所有按钮:

for button in buttonsWithShadow {
    button.layer.shadowColor = UIColor.black.cgColor
    button.layer.shadowOpacity = 1
    button.layer.shadowOffset = CGSize(width: 5, height: 5)
    button.layer.shadowRadius = 0
}