在我的视图中控制器我需要处理按钮UI
我认为我的处理 UI 的方法效率不高
如果有一天我需要做更多的按钮怎么办?
今天我恰好只有三个.....
只想让用户按三个中的一个,而其他人保持原始颜色
喜欢让用户感觉到他们在多个按钮中按下哪一个
这是我的@IBAction
@IBAction func btnPress (_ sender: UIButton) {
let clickedBackgroundColor = UIColor(red: 1, green: 153, blue: 202, a: 1)
let clickedTextColor = UIColor(red: 255, green: 255, blue: 255, a: 1)
let originBackgroundColor = UIColor(red: 216, green: 247, blue: 250, a: 1)
let originTextColor = UIColor(red: 0, green: 71, blue: 88, a: 1)
switch sender {
case btnA:
btnA.backgroundColor = clickedBackgroundColor
btnA.setTitleColor(clickedTextColor, for: .normal)
btnA.underline()
btnB.backgroundColor = originBackgroundColor
btnB.setTitleColor(originTextColor, for: .normal)
btnC.backgroundColor = originBackgroundColor
btnC.setTitleColor(originTextColor, for: .normal)
case btnB:
btnB.backgroundColor = clickedBackgroundColor
btnB.setTitleColor(clickedTextColor, for: .normal)
btnB.underline()
btnA.backgroundColor = originBackgroundColor
btnA.setTitleColor(originTextColor, for: .normal)
btnC.backgroundColor = originBackgroundColor
btnC.setTitleColor(originTextColor, for: .normal)
case btnC:
btnC.backgroundColor = clickedBackgroundColor
btnC.setTitleColor(clickedTextColor, for: .normal)
btnC.underline()
btnA.backgroundColor = originBackgroundColor
btnA.setTitleColor(originTextColor, for: .normal)
btnB.backgroundColor = originBackgroundColor
btnB.setTitleColor(originTextColor, for: .normal)
default:break
}
}
和我的 UIButton 扩展添加下划线
我只能添加下划线,但是如果用户单击其他按钮,如何删除它?
extension UIButton {
func underline() {
guard let text = self.titleLabel?.text else { return }
let attributedString = NSMutableAttributedString(string: text)
attributedString.addAttribute(NSAttributedString.Key.underlineStyle, value: NSUnderlineStyle.single.rawValue, range: NSRange(location: 0, length: text.count))
self.setAttributedTitle(attributedString, for: .normal)
}
}
我真的很新,不擅长质疑是否需要更多信息,请问我,谢谢。
您只需为所有buttons
创建一个Outlet Collection
,而不是显式创建buttons
array
并使用它来根据选择设置button's
属性,即
@IBOutlet var buttons: [UIButton]!
用法:
@IBAction func btnPress (_ sender: UIButton) {
let clickedBackgroundColor = UIColor(red: 1, green: 153, blue: 202, a: 1)
let clickedTextColor = UIColor(red: 255, green: 255, blue: 255, a: 1)
let originBackgroundColor = UIColor(red: 216, green: 247, blue: 250, a: 1)
let originTextColor = UIColor(red: 0, green: 71, blue: 88, a: 1)
buttons.forEach { (button) in
button.backgroundColor = (button == sender) ? clickedBackgroundColor : originBackgroundColor
button.setTitleColor((button == sender) ? clickedTextColor : originTextColor, for: .normal)
if button == sender {
button.underline()
}
}
}
注意:此外,无需遍历array
两次。 One single traversal
工作正常。