输入框随着键盘弹起

//导入库

pod 'IQKeyboardManager'

//在appdelegate初始化

func initIQKeyboardManager(){

        //键盘事件

        let keyManager = IQKeyboardManager.sharedManager()

        keyManager.enable = true

        keyManager.shouldResignOnTouchOutside =true

        keyManager.shouldToolbarUsesTextFieldTintColor =false

        keyManager.enableAutoToolbar = true

//哪些界面不用

        keyManager.disableInViewControllerClass(WebCommentController.classForCoder())

    }