<li class="menu-item" v-if="menu.button.length<3"> <i class="icon14_menu_add"></i></li>
</ul>
</div>
</div>
给vue实例添加方法
在vue实例中给methods对象中添加我们自定义的方法
methods: {
//选中主菜单
selectedMenu:function (i) {
this.selectedSubMenuIndex = ''
this.selectedMenuIndex = i
},
//选中子菜单
selectedSubMenu:function (i) {
this.selectedSubMenuIndex = i
},
//选中菜单级别
selectedMenuLevel: function () {
if (this.selectedMenuIndex !== '' && this.selectedSubMenuIndex === '') {
//主菜单
return 1;
} else if (this.selectedMenuIndex !== '' && this.selectedSubMenuIndex !== '') {
//子菜单
return 2;
} else {
//未选中任何菜单
return 0;
}
},
//添加菜单
//参数level为菜单级别，1为主菜单、2为子菜单
addMenu:function (level) {
if (level == 1 && this.menu.button.length < 3) {
this.menu.button.push({"name": "菜单名称",
"sub_button": [] })
this.selectedMenuIndex = this.menu.button.length - 1
this.selectedSubMenuIndex = ''
}
if (level == 2 && this.menu.button[this.selectedMenuIndex].sub_button.length < 5) {
this.menu.button[this.selectedMenuIndex].sub_button.push({
"name": "子菜单名称"
})
this.selectedSubMenuIndex = this.menu.button[this.selectedMenuIndex].sub_button.length - 1
}
}
}给菜单绑定方法
当点击菜单触发selectedMenu方法，点击添加按钮触发添加addMenu方法。使用v-on来监听事件，它的缩写是@
监听点击事件@click ，为了防止子菜单点击事件冒泡的主菜单，则使用.stop事件修饰符来阻止冒泡@click.stop
使用v-bind:class来添加切换菜单选中时的class。:class为缩写
<ul class="weixin-menu" id="weixin-menu" >
<!-- 判断如果selectedMenuIndex是当前点击的主菜单索引则添加current样式 -->
<li v-for="(btn,i) in menu.button" class="menu-item" :class="{current:selectedMenuIndex===i&&selectedMenuLevel()==1}" @click="selectedMenu(i)">
<div class="menu-item-title">
<span>{{ btn.name }}</span>
</div>
<!-- v-show来切换是否显示 这里如果选中了主菜单则子菜单弹出 -->
<ul class="weixin-sub-menu" v-show="selectedMenuIndex===i">
<li v-for="(sub,i2) in btn.sub_button" class="menu-sub-item" :class="{current:selectedSubMenuIndex===i2&&selectedMenuLevel()==2}" @click.stop="selectedSubMenu(i2)">
<div class="menu-item-title">
<span>{{sub.name}}</span>
