小编SoC*_*Cor的帖子

Xcode 6.3.在实现UITextFieldDelegate协议的类中,我想重写touchesBegan()方法以隐藏键盘.如果我在函数规范中避免编译器错误,那么尝试从Set或NSSet读取"touch"时会出现编译错误,否则super.touchesBegan(touches,withEvent:event)会抛出错误.在Xcode 6.2中编译的这些组合之一!(那么Swift"Set"的文档在哪里以及如何从一个元素中获取元素？)

 override func touchesBegan(touches: NSSet, withEvent event: UIEvent) { 
    // Hiding the Keyboard when the User Taps the Background
        if let touch =  touches.anyObject() as? UITouch {
            if nameTF.isFirstResponder() && touch.view != nameTF {
                nameTF.resignFirstResponder();
            }
        }
        super.touchesBegan(touches , withEvent:event)
    }

尝试:

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) or
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent) 

编译器错误:使用选择器'touchesBegan:withEvent:'的覆盖方法具有不兼容的类型'(NSSet,UIEvent) - >()'和

super.touchesBegan(touches , withEvent:event)

还抱怨

'NSSet'不能隐式转换为'Set'; 你的意思是使用'as'来明确转换？

尝试:

override func touchesBegan(touches: Set<AnyObject>, withEvent event: UIEvent) 

编译器错误:类型'AnyObject'不符合协议'Hashable'

尝试:

override func …