<NME> common.wxss
<BEF> .cropper-wrapper{
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    justify-content: center;
    height: 100%;
    background-color: #e5e5e5;
}

.cropper-buttons{
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50px;
    padding: 0 20rpx;
    box-sizing: border-box;
    line-height: 50px;
}

.cropper-buttons .upload, .cropper-buttons .getCropperImage{
    text-align: center;
}
<MSG> fixed ios wxss performance

<DFF> @@ -1,4 +1,5 @@
 .cropper-wrapper{
+    position: relative;
     display: flex;
     flex-direction: row;
     justify-content: space-between;

fixed ios wxss performance