Question

我在UIWebView中显示一个有下拉列表的网站页面。用户可以从下拉列表中选择值，但是当应用程序关闭并再次打开时，此下拉列表将停止工作，这意味着用户无法选择它。

奇怪的是，如果我们在该dropdwon上显示javascript的警告框，那么在点击警告框的ok按钮后一切正常（意味着dropdwon变得可点击），那么它可能是什么原因和解决方案呢？

Answer 1

我有同样的问题所以我找到了解决它的工作在您的网站中，在document.ready中放入以下javascript行，其中包含下拉列表

/**
   * Create a simple mobile accordion.
   */
  Drupal.cgl.mobaccordion = function() {
    var mobaccordion = $('.mobaccordion');

    mobaccordion.each(function() {
      var mobaccordionTitle = $(this).find('.mobaccordion-title');
      var mobaccordionBody = $(this).find('.mobaccordion-body');
      var mobaccordionIcon = $(this).find('.mobaccordion-icon');
      var mobaccordionId = '#' + $(this).attr('id');
      var target = window.location.pathname + '#' + mobaccordionId;

      if ( (Drupal.cgl.isMobile()) && (mobaccordionIcon.length == 0) && (mobaccordionTitle.length != 0 ) ){
        // Don't close accordion when referred to title.
        if(window.location.hash !=  mobaccordionId) {
          mobaccordionBody.hide();
        }
          // Create icon to click.
          $(this).prepend('<a href="' + target + '" class="mobaccordion-icon" title="Dit menu-onderdeel kunt u uitklappen"><span class="element-invisible">Ingeklapt, klik om uit te klappen</span></a>');
          var mobaccordionIcon = $(this).find('.mobaccordion-icon');

          // Events when title or icons are clicked or pressed.
          $(mobaccordionIcon).add(mobaccordionTitle).on('click', function (e) {
            e.preventDefault();
            var parent = $(this).parents('.mobaccordion');
            Drupal.cgl.mobaccordionToggle(parent);
          });

        //$('#mobaccordion-11').addClass('open');      

      }
      else if (Drupal.cgl.isMobile() == false) {
        //unset and remove everything when screen is not mobile.
        $(this).find('.mobaccordion-body').show();
        $(this).removeClass('open');
        $(mobaccordionIcon).add(mobaccordionTitle).off('click');
        $('.mobaccordion-icon').remove();
      }
    });
  };

  Drupal.cgl.mobaccordionToggle = function(mobaccordion) {
    mobaccordion.find('.mobaccordion-body').slideToggle();
    mobaccordion.toggleClass('open');
    mobaccordion.find('.mobaccordion-icon').toggleClass('active');
    mobaccordion.find('.mobaccordion-icon .element-invisible').remove();
    if (mobaccordion.hasClass('open')){
      mobaccordion.find('.mobaccordion-icon').append('<span class="element-invisible">Uitgeklapt, klik om in te klappen</span>');
    }else{
      mobaccordion.find('.mobaccordion-icon').append('<span class="element-invisible">Ingeklapt, klik om uit te klappen</span>');
    }
  };

在你的UIWebView控制器中放入以下代码

 var appname = 'yourappName';
        var actionName = 'displayAlert';
        var url = appname + '://' + actionName;
        document.location.href = url;

当您的页面加载并执行javascript行时上面的代码不会丢失任何viewcontroller但会触发dropddown再次工作

无法在IOS 9的UIWebView中选择下拉列表

1 个答案: