elementui tabs自定义标签页在标签后面增加添加按钮问题

刺骨的言语ヽ痛彻心扉 2021-12-21 13:21 3890阅读 0赞

本来我想实现这样的tab切换效果，能删除和添加

![20190628114701335.gif][]

但看了看elementui的文档，有点不太一样

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpYW56aGFuZzg2MQ_size_16_color_FFFFFF_t_70][]

添加按钮跑天上去了，所以我就基于原本功能做了一些优化以实现我想要的结果

1.首先在循环的el-tab-pane下面单独添加一个el-tab-pane，并取一个特别的名字，我叫add

<el-tabs v-model="editableTabsValue" type="card" 
    	@tab-remove="removeTab" 
    	:before-leave="beforeLeave"
    	class="my-tab-pane"
    	>
    	<el-tab-pane
    		v-for="(item, index) in editableTabs"
    		:key="item.name"
    		:label="item.title"
    		:name="item.name"
    		closable
    	>
    	</el-tab-pane>
    	<el-tab-pane key="add" name="add" >
    		<span slot="label" style="padding: 8px;font-size:20px;font-weight:bold;">
    			+
    		</span>
    	</el-tab-pane>
    </el-tabs>

2.data

data() {
      return {
    	editableTabsValue: '1',
    	currentIndex:1,
    	editableTabs: [{
    	  title: '活动1',
    	  name: '1',
    	}],
    	tabIndex: 1,
    	addIndex:1,
      }
    },

3.添加删除方法

addTab() {
    	let newTabIndex = ++this.tabIndex + '';
    	this.editableTabs.push({
    		title: '活动'+ ++this.addIndex,
    		name: newTabIndex,
    	});
    	this.editableTabsValue = newTabIndex;
    	this.currentIndex=newTabIndex;
    },
    removeTab(targetName) {
    	if(this.editableTabs.length<=1){
    		return false;
    	}
    	var self=this;
    	let tabs = self.editableTabs;
    	let activeName = self.editableTabsValue;
    	if (activeName === targetName) {
    		tabs.forEach((tab, index) => {
    			if (tab.name === targetName) {
    				let nextTab = tabs[index + 1] || tabs[index - 1];
    				if (nextTab) {
    					activeName = nextTab.name;
    				}
    			}
    		});
    	}
    	self.editableTabsValue = activeName;
    	
    	self.editableTabs = tabs.filter(tab => tab.name !== targetName);
    	
    	self.editableTabs.map((tab,index)=>{
    		tab.title="活动"+(index+1);
    		self.addIndex=(index+1);
    	})
    	self.currentIndex=self.editableTabsValue;
    	self.$message({
    						type: 'success',
    						message: '删除成功!'
    	});
    },
    /* 活动标签切换时触发 */
    beforeLeave(currentName,oldName) {
    	var self=this;
    	//重点，如果name是add，则什么都不触发
    	if(currentName=="add"){
    		this.addTab()
    		return false
    	}else{
    		this.currentIndex=currentName;
    	}
    }

总结：

其实添加这个按钮本质和tab一样，但是点它不切换标签，而是调用添加方法。

![20190628120014528.png][]

[20190628114701335.gif]: /images/20211220/5f1cee3489fb4589a9855f4852412027.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpYW56aGFuZzg2MQ_size_16_color_FFFFFF_t_70]: /images/20211220/496a1d0f8e9c4df5921a193f5561073a.png
[20190628120014528.png]: /images/20211220/a4e2fc21de3748e2bd87f7699cd61eba.png