更新到xcode 8 beta 6后,我收到了错误
无法指定类型'() - >的值Void'输入'(() - > Void)!'
在以下func块上,第三行:
// Button sub-class
public class SCLButton: UIButton {
var actionType = SCLActionType.none
var target:AnyObject!
var selector:Selector!
var action:(()->Void)!
public init() {
super.init(frame: CGRect.zero)
}
required public init?(coder aDecoder: NSCoder) {
super.init(coder:aDecoder)
}
override public init(frame:CGRect) {
super.init(frame:frame)
}
// required public init?(coder aDecoder: NSCoder) {
// fatalError("init(coder:) has not been implemented")
// }
}
public func addButton(_ title:String, action:()->Void)->SCLButton {
let btn = addButton(title)
btn.actionType = SCLActionType.closure
btn.action = action // here is where the error occurs
btn.addTarget(self, action:#selector(SCLAlertView.buttonTapped(_:)), for:.touchUpInside)
btn.addTarget(self, action:#selector(SCLAlertView.buttonTapDown(_:)), for:[.touchDown, .touchDragEnter])
btn.addTarget(self, action:#selector(SCLAlertView.buttonRelease(_:)), for:[.touchUpInside, .touchUpOutside, .touchCancel, .touchDragOutside] )
return btn
}
有关修复的任何建议吗?
答案 0 :(得分:5)
看来你的问题与此有关: SE-0103
尝试将addButton(_:action:)
的方法标题追溯到:
public func addButton(_ title:String, action:@escaping ()->Void)->SCLButton {
来自新测试版的诊断消息如此混乱且不充分,但使您的属性完全不可选var action:()->Void = {}
将为您提供更多有用的信息。