我刚刚更新到Xcode中8,现在我得到的错误在我的项目类型“NSObject的”没有成员“复制”
类型“NSObject的”没有成员“复制”。
在升级Xcode之前,我没有收到这个错误。
注意:我仍然使用Swift 2.3。我对UILabel进行了分类,以便我可以让用户在长按时从标签中复制文本。以下是我的代码。
if action == #selector(NSObject.copy(_:))
下面是完整的代码:上线时出现错误
class MCCopyableLabel: UILabel {
override init(frame: CGRect) {
super.init(frame: frame)
sharedInit()
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)!
sharedInit()
}
func sharedInit() {
userInteractionEnabled = true
addGestureRecognizer(UILongPressGestureRecognizer(target: self, action: #selector(MCCopyableLabel.showMenu(_:))))
}
func showMenu(sender: AnyObject?) {
becomeFirstResponder()
let menu = UIMenuController.sharedMenuController()
if !menu.menuVisible {
menu.setTargetRect(bounds, inView: self)
menu.setMenuVisible(true, animated: true)
}
}
override func copy(sender: AnyObject?) {
let board = UIPasteboard.generalPasteboard()
board.string = text
let menu = UIMenuController.sharedMenuController()
menu.setMenuVisible(false, animated: true)
}
override func canBecomeFirstResponder() -> Bool {
return true
}
override func canPerformAction(action: Selector, withSender sender: AnyObject?) -> Bool {
if action == #selector(NSObject.copy(_:)) {
return true
}
return false
}
}
这也许应该是'UIResponder.copy(_ :)'或'只是副本(_ :)' – dan
@丹感谢那些固定它! – chickenparm