swift键盘处理方式

最新推荐文章于 2022-08-21 00:10:44 发布

原创最新推荐文章于 2022-08-21 00:10:44 发布 · 630 阅读

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#swift #ios

//MARK:属性列表
var toolBarCons: NSLayoutConstraint?

//MARK:视图生命周期

    override func viewDidLoad() {
        super.viewDidLoad()

        //注册通知
        NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardChangeAction:", name: UIKeyboardWillChangeFrameNotification, object: nil)
    }

    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        //弹出键盘
        textView.becomeFirstResponder()
    }

    deinit{
        //移除通知
        NSNotificationCenter.defaultCenter().removeObserver(self)
    }

    //MARK:自定义方法
    //通知调用方法
    @objc private func keyboardChangeAction(notification: NSNotification){

        let keyboardRect = notification.userInfo![UIKeyboardFrameEndUserInfoKey]!.CGRectValue
        let duration = notification.userInfo![UIKeyboardAnimationDurationUserInfoKey]!.doubleValue

//取到你自己toolBar的约束

        toolBarCons?.constant = -UIScreen.mainScreen().bounds.size.height + keyboardRect.origin.y

        UIView.animateWithDuration(duration) { () -> Void in
            self.view.layoutIfNeeded()
        }

    }

//懒加载－－工具栏
    private lazy var toolBar:UIToolbar = {
      let toolBar = UIToolbar()
      toolBar.backgroundColor = UIColor(white: 0.8, alpha: 1)
        return toolBar
    }()