I set the height of the entire container element to 100vhdisplay to flex,flex-direction: column.

child element An is set to flex:1, child element B initialization is fixed height, click height will increase, child element A will fill the remaining space. It works fine on android, but on iOS, the increase in sub-element B doesn"t show up. I found that at this time, the bottom of child element B is set to negative, and the size of bottom is the increased height, so the increase in the height of child element B will not show

what"s going on?