uniapp tabBar背景颜色

在UniApp中，可以通过在`pages.json`文件的全局配置中设置`tabBar.backgroundColor`来指定tabBar的背景颜色。例如，可以在`pages.json`中添加以下代码来设置tabBar的背景颜色为黑色：

"tabBar": {
  "backgroundColor": "#000000"
}

这样设置后，整个应用的tabBar背景颜色就会变为黑色。需要注意的是，该设置是全局生效的，会对所有页面的tabBar生效。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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