优化代码

src/swipe/index.js

@@ -298,8 +298,7 @@ class Swipe extends Component {
       this.$on('mouseenter', () => this.showArrow())
       this.$on('mouseleave', () => this.hideArrow())
     } else if (this.arrow === 'alway') {
-      this.showArrowBtn = true
-      this.$requestUpdate()
+      this.showArrow()
     }
   }
   unmounted() {