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我有从Swift 3.2切换到Swift 4.0时停止工作的代码。它的目标是向所有UIButtons和UISwitches添加点击操作。UIControl.appearance()。addTarget在Swift上停止工作4
private func turnSound(state: Bool) {
UIButton.appearance().isSoundEnabled = state
UISwitch.appearance().isSoundEnabled = state
}
extension UIControl {
var isSoundEnabled: Bool {
get {
return target(forAction: #selector(AudioManager.playStandardClickSound), withSender: nil) != nil ? true : false
}
set {
if newValue {
addTarget(AudioManager.manager, action: #selector(AudioManager.playStandardClickSound), for: .touchUpInside)
} else {
removeTarget(AudioManager.manager, action: #selector(AudioManager.playStandardClickSound), for: .touchUpInside)
}
}
}
}
它也工作过,但现在我得到一个异常:
'NSInvalidArgumentException', reason: '*** Illegal axis type, : for appearance setter, addTarget:action:forControlEvents:. Expected NSInteger or NSUInteger'
而且我不知道如何摆脱这个问题。
很高兴有任何帮助或替代解决方案。
UPDATE:
就是这样。非常感谢! –