最近做一個專案時，用到了echarts實現資料視覺化，因為之前沒怎麼接觸過echarts，導致在使用echarts時踩了不少的坑，其中一個就是關於“使用bootstrap的tab選項卡時無法正常顯示echarts影象”的問題。在百度上找了很久，嘗試了各種各樣的解決方案，終於能讓影象隨著tab選項卡的切換正常顯示了。解決方法容本菜雞細細道來。

專案中的大致要求如上圖所示，當頁面載入完成時，“本日”高亮，並且載入“本日”的圖表，當每次點選其他選項時，載入該選項對應的圖表（每次點選都必須重新渲染）。

當時一想，這還不簡單嘛，每次點選重新init就行了嘛，然而很快被打臉了.先貼上我的tab選項卡部分的程式碼:

<div>
                        <ul class="nav nav-tabs" role="tablist">
                            <li role="presentation" class="active"><a href="#thisDay" aria-controls="thisDay" role="tab" data-toggle="tab">本日</a></li>
                            <li role="presentation"><a href="#thisWeek" aria-controls="thisWeek" role="tab" data-toggle="tab">本週</a></li>
                            <li role="presentation"><a href="#thisMonth" aria-controls="thisMonth" role="tab" data-toggle="tab">本月</a></li>
                            <li role="presentation"><a href="#thisQuarter" aria-controls="thisQuarter" role="tab" data-toggle="tab">本季度</a></li>
                            <li role="presentation"><a href="#thisYear" aria-controls="thisYear" role="tab" data-toggle="tab">本年</a></li>
                        </ul>
                        <div class="tab-content">
                            <div role="tabpanel" class="tab-pane active" id="thisDay">
                                <div class="input-date-container"></div>
                                <div class="myTable-container" id="thisDay-container"></div><!--包裹echarts表格的容器-->
                            </div>
                            <div role="tabpanel" class="tab-pane" id="thisWeek">
                                <div class="input-date-container"></div>
                                <div class="myTable-container" id="thisWeek-container"></div>
                            </div>
                            <div role="tabpanel" class="tab-pane" id="thisMonth">
                                <div class="input-date-container"></div>
                                <div class="myTable-container" id="thisMonth-container"></div>
                            </div>
                            <div role="tabpanel" class="tab-pane" id="thisQuarter">
                                <div class="input-date-container"></div>
                                <div class="myTable-container" id="thisQuarter-container"></div>
                            </div>
                            <div role="tabpanel" class="tab-pane" id="thisYear">
                                <div class="input-date-container"></div>
                                <div class="myTable-container" id="thisYear-container"></div>
                            </div>
                        </div>
 

相關css的程式碼:

.pic-group-container{
    width: 80%;
    margin: 0 auto;
}
.pic-group-container > img {
    width: 100%;
}
.pic-data-table{
    text-align: center;
    margin: 0 auto;
}
.myTable-container{
    width: 800px;
    height: 430px;
}

這樣就實現了tab的切換,這樣子就實現了tab選項卡的功能,然後就開心的寫echarts渲染.程式碼如下:

var thisDay = document.getElementById('thisDay-container');
var thisWeek = document.getElementById('thisWeek-container');
var thisMonth = document.getElementById('thisMonth-container');
var thisQuarter = document.getElementById('thisQuarter-container');
var thisYear = document.getElementById('thisYear-container');
option1 = {
    xAxis: {
        type: 'category',
        data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
    },
    yAxis: {
        type: 'value'
    },
    series: [{
        data: [820, 932, 901, 934, 1290, 1330, 1320],
        type: 'line',
        smooth: true
    }]
};
option2 = {
    xAxis: {
        type: 'category',
        data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
    },
    yAxis: {
        type: 'value'
    },
    series: [{
        data: [820, 645, 901, 934, 1290, 1330, 1320],
        type: 'line',
        smooth: true
    }]
};
var thisDayTable = echarts.init(thisDay);
thisDayTable.setOption(option1);

這個時候我發現除了點選第一個表格能渲染外其餘表格均無法渲染,然後對程式碼進行了部分修改,過程就不再贅述了,相關要點我在下面的程式碼中進行了註釋.

//獲取圖表容器
var thisDay = document.getElementById('thisDay-container');
var thisWeek = document.getElementById('thisWeek-container');
var thisMonth = document.getElementById('thisMonth-container');
var thisQuarter = document.getElementById('thisQuarter-container');
var thisYear = document.getElementById('thisYear-container');


$('a[data-toggle="tab"]').on('shown.bs.tab', function (e) {//shown.bs.tab為tab選項卡高亮事件,
    //關鍵操作！！！！
    // 獲取已啟用的標籤頁的名稱
    var activeTab = $(e.target)[0].hash;//hash 屬性是一個可讀可寫的字串，該字串是 URL 的錨部分（從 # 號開始的部分）

    if(activeTab === "#thisWeek"){//當相應的標籤被點選時，進行對應的圖表渲染
        echarts.dispose(thisWeek);//釋放圖表例項，使例項不可用,如果不加上這個，會報錯：there is a chart instance already initialized on the dom
        var thisWeekTable = echarts.init(thisWeek);
        thisWeekTable.setOption(option1);
    } else if(activeTab === "#thisMonth"){
        echarts.dispose(thisMonth);
        var thisMonthTable = echarts.init(thisMonth);
        thisMonthTable.setOption(option1);
    }else if(activeTab === "#thisQuarter"){
        echarts.dispose(thisQuarter);
        var thisQuarterTable = echarts.init(thisQuarter);
        thisQuarterTable.setOption(option1);
    }else if(activeTab === "#thisYear"){
        echarts.dispose(thisYear);
        var thisYearTable = echarts.init(thisYear);
        thisYearTable.setOption(option2);
    }
});

option1 = {
    xAxis: {
        type: 'category',
        data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
    },
    yAxis: {
        type: 'value'
    },
    series: [{
        data: [820, 932, 901, 934, 1290, 1330, 1320],
        type: 'line',
        smooth: true
    }]
};
option2 = {
    xAxis: {
        type: 'category',
        data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
    },
    yAxis: {
        type: 'value'
    },
    series: [{
        data: [820, 645, 901, 934, 1290, 1330, 1320],
        type: 'line',
        smooth: true
    }]
};
var thisDayTable = echarts.init(thisDay);
thisDayTable.setOption(option1);

到此為止,問題總算是解決了,在開發者工具也不會報錯了,

效果截圖如下:

ps:本人菜雞一枚,第一次在csdn上寫文章,如有寫的不好的地方歡迎各位指出.