APP开发之IOS SWIFT如何隐藏键盘-IOS隐藏键盘全解

如果你是刚从网站建设行业转到APP开发，那么你会觉得不可思议，隐藏键盘这么简单的事情，还要这样大费周张。先不牢骚了，以上是方维网络的解决经验：

正常情况下，只要触摸焦点放在输入框如textField\textView上，自动会弹出键盘，所以，隐藏键盘的最终方法就是让控件失去焦点。

textField.resignFirstResponder()
textView.resignFirstResponder()
 

用例一、TextField按Enter键隐藏

实现委托UITextFieldDelegate 方法
func textFieldShouldReturn(textField: UITextField) -> Bool {
      textField.resignFirstResponder()
      return true
}

用例二、点击其他任意地方隐藏

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        self.textField.resignFirstResponder()
        self.textView.resignFirstResponder()
}
 

用例三、点击手势隐藏

let tapGesture:UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "hideKeyboard:")
 
 
        self.view.addGestureRecognizer(tapGesture)
 
func hideKeyboard(sender: UITapGestureRecognizer) {
        self.SearchBar1.resignFirstResponder()
}
 

用例四、滚动tableView隐藏

func scrollViewDidScroll(scrollView: UIScrollView) {
        self.SearchBar1.resignFirstResponder()
}
 

用例五、通过键盘通知事件在其上方添加按钮

override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        //添加键盘弹出通知
        NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardDidShow:"), name: UIKeyboardDidShowNotification, object: nil)
        //添加键盘收起同志
        NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)
       
    }
   
override func viewDidDisappear(animated: Bool) {
   //取消通知
        NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardDidShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil)
    }
   
    func keyboardDidShow(notification:NSNotification) {
        let keyBoardBounds = (notification.userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()
        let deltaY = keyBoardBounds.size.height
        let frame_height = self.view.frame.size.height
        let butheight = frame_height - deltaY - 40
        let width = self.view.frame.size.width
        let cancalButton = UIButton(frame: CGRectMake(0,butheight,width/2,40))
        cancalButton.setTitle("取消", forState:UIControlState.Normal)
        cancalButton.setTitleColor(UIColor.grayColor(), forState: UIControlState.Normal)
        cancalButton.backgroundColor = UIColor(red: 238/255, green: 238/255, blue: 238/255, alpha: 1)
        cancalButton.addTarget(self, action: "hideKeyboard", forControlEvents: UIControlEvents.TouchUpInside)
        cancalButton.tag = 9999991
        self.view.addSubview(cancalButton)
       
        let completEditButton = UIButton(frame: CGRectMake(width/2,butheight,width/2,40))
        completEditButton.setTitle("完成", forState:UIControlState.Normal)
        completEditButton.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Normal)
        completEditButton.backgroundColor = UIColor.darkGrayColor()
        completEditButton.addTarget(self, action: "completeKeyboard", forControlEvents: UIControlEvents.TouchUpInside)
        completEditButton.tag = 9999992
        self.view.addSubview(completEditButton)
    }
   
    func keyboardWillHide(notification:NSNotification) {
        if self.view.viewWithTag(9999991) != nil {
            let btnCancal = self.view.viewWithTag(9999991) as! UIButton
            let btnComplete = self.view.viewWithTag(9999992) as! UIButton
            btnCancal.removeFromSuperview()
            btnComplete.removeFromSuperview()
        }
    }