移动端开发，ios机型点击input，页面放大解决方案

<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"/>

    document.documentElement.addEventListener(‘touchstart‘, function (event) {
        if (event.touches.length > 1) {
          event.preventDefault();
        }
      }, false);
      document.addEventListener(‘gesturestart‘, function(event) {
        event.preventDefault();
      });