模拟器下模拟苹果X环境，scroll-view不能铺满屏幕

<view class=‘wrap’><scroll-view class=‘scroll-box’></scroll-view></view>

.wrap {

position: absolute;

left: 0;

top: 0;

right: 0;

bottom: 0;

box-sizing: border-box;

background: #f0eff4;

font-size: 28rpx;

line-height: 1;

z-index: 1;

overflow: hidden;

}

.scroll-box {

height: 100%;

}

为什么下面会有留白？