A compatibility issue with H5 on ios phones

## Problem Description:

Today, the online environment suddenly received a feedback that there was a problem on an ISO mobile phone. There was an input box when the popup was evoked. When I entered the content and then clicked the OK button, it was found to be invalid.

Problematic phones:

Iphone8 iphone7.0.15 ios12.4.8 iphone6 plus

## Cause analysis:

When the keyboard is aroused in ios phone, the page will be lifted up, resulting in the scroll bar appearing in the whole page. At this time, the positioning of the pop-up window is not accurate relative to the position of the window, resulting in the contents of the whole pop-up area cannot be selected, so the event cannot be triggered.

## Solution:

Dynamically restore the scollTop value of the page when input loses focus

onBlur(){   
   var pageNode = document.querySelector('.container');  
   pageNode.scrollTop = 0;
}
Copy the code

## revalidate:

Package and verify again, no problem.