移动Safari忽略了我的自动对焦jQuery事件？

Question

I am trying to on page load have the first form field to be automatically selected/in focus by using the focus() method in jQuery. This works fine on the deskop - however this doesn't appear to work on iOS in the Safari browser - can anyone suggest why not?

    var el = $('#txtNewUsername').get(0);
    var elemLen = el.value.length;

    el.selectionStart = elemLen;
    el.selectionEnd = elemLen;
    el.focus();

Answer 1

I heard about this problem for many times.

This might be helpful Mobile Safari: Javascript focus()