版权声明： https://blog.csdn.net/caoyan0829/article/details/85311941
<meta name="viewport" content="width=device-width, user-scalable=no, viewport-fit=cover">
viewport-fit=cover 意思为全屏显示
再通过padding就可以适配了
padding-bottom":"constant(safe-area-inset-bottom)
padding-top":"constant(safe-area-inset-top)