解决uniapp App端iconfont图标显示异常问题

原来的iconfont.css：

@font-face {
  font-family: "iconfont"; /* Project id 2762712 */
  src: url('iconfont.woff2?t=1631523743638') format('woff2'),
       url('iconfont.woff?t=1631523743638') format('woff'),
       url('iconfont.ttf?t=1631523743638') format('truetype');
}

.iconfont {
  font-family: "iconfont" !important;
  font-size: 16px;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

......

url改用绝对路径，App端就可以正常显示iconfont图标了。修复后的iconfont.css：

@font-face {
  font-family: "iconfont"; /* Project id 2762712 */
  src: url('~@/static/iconfont/iconfont.woff2?t=1631523743638') format('woff2'),
       url('~@/static/iconfont/iconfont.woff?t=1631523743638') format('woff'),
       url('~@/static/iconfont/iconfont.ttf?t=1631523743638') format('truetype');
}

.iconfont {
  font-family: "iconfont" !important;
  font-size: 16px;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

......