nd_wxapp/component/iView/tab-bar-item/index.wxml

<view class="i-class i-tab-bar-item">
    <i-badge dot="{{ dot }}" count="{{ dot ? 0 : count }}">
        <view>
            <i-icon wx:if="{{ icon || currentIcon }}" i-class="i-tab-bar-item-icon {{ current ? 'item-index--i-tab-bar-item-icon-current' : '' }}" color="{{ current ? currentColor : '' }}" type="{{ current ? currentIcon : icon }}" size="22"></i-icon>
            <image wx:else class="i-tab-bar-item-img" src="{{ current ? currentImg : img }}"></image>
            <view class="i-tab-bar-item-title {{ current ? 'i-tab-bar-item-title-current' : '' }}" wx:if="{{ current && currentColor }}" style="color: {{ currentColor }}">{{ title }}</view>
            <view class="i-tab-bar-item-title {{ current ? 'i-tab-bar-item-title-current' : '' }}" wx:else>{{ title }}</view>
        </view>
    </i-badge>
</view>