ui-select 输入在点击时没有获得焦点：与 angular-touch 冲突

Question

我在使用 ui-select 和 angular-touch 的 AngularJS 应用程序上遇到问题。

在 Safari 上，使用 iPad 或 iPhone 等移动设备，当我单击 ui-select 指令的文本输入字段时,虚拟键盘打不开,输入框没有焦点

我发现是 angular-touch 导致了问题，因为一旦我从应用程序中删除依赖项，一切都会再次正常。

HTML

<body ng-controller="DemoCtrl">
  <ui-select multiple
             theme="select2"
             ng-model="multipleDemo.selection"
             reset-search-input="true"
             style="min-width: 300px;">
    <ui-select-match placeholder="Enter an adress...">
      {{$item.formatted_address}}
    </ui-select-match>
    <ui-select-choices repeat="address in addresses track by $index"
                       refresh="refreshAddresses($select.search)" 
                       refresh-delay="250">
      <div ng-bind-html="address.formatted_address | highlight: $select.search"></div>
    </ui-select-choices>
  </ui-select>
  <p>Selected : {{multipleDemo.selection | selectionFilter}}</p>

</body>

JS

var app = angular.module('demo', ['ngSanitize', 'ui.select', 'ngTouch']);

app.filter('selectionFilter', function() {
  // Not important... see the plunker for detail.
});

app.controller('DemoCtrl', function($scope, $http) {
  $scope.multipleDemo = {};
  $scope.multipleDemo.selection = [];

  $scope.address = {};
  $scope.refreshAddresses = function(address) {
    var params = {address: address, sensor: false};
    return $http.get(
      'http://maps.googleapis.com/maps/api/geocode/json',
      {params: params}
    ).then(function(response) {
      $scope.addresses = response.data.results;
    });
  };  

});

http://plnkr.co/edit/dFBQ4si6hLMP1S9dal7m?p=preview

有人知道我可以做些什么来防止 ngTouch 引起问题吗？我不能只从依赖项中删除 ngTouch：我在其他地方需要它。

更新 16/09

问题似乎出在angular-touch (1.4.8) 的这一部分:

element.on('touchend', function(event) {
  var diff = Date.now() - startTime;

  // Use jQuery originalEvent
  var originalEvent = event.originalEvent || event;
  var touches = (originalEvent.changedTouches && originalEvent.changedTouches.length) ?
      originalEvent.changedTouches :
      ((originalEvent.touches && originalEvent.touches.length) ? originalEvent.touches : [originalEvent]);
  var e = touches[0];
  var x = e.clientX;
  var y = e.clientY;
  var dist = Math.sqrt(Math.pow(x - touchStartX, 2) + Math.pow(y - touchStartY, 2));

  if (tapping && diff < TAP_DURATION && dist < MOVE_TOLERANCE) {
    // Call preventGhostClick so the clickbuster will catch the corresponding click.
    preventGhostClick(x, y);

    // Blur the focused element (the button, probably) before firing the callback.
    // This doesn't work perfectly on Android Chrome, but seems to work elsewhere.
    // I couldn't get anything to work reliably on Android Chrome.
    if (tapElement) {
      tapElement.blur();
    }

    if (!angular.isDefined(attr.disabled) || attr.disabled === false) {
      element.triggerHandler('click', [event]);
    }
  }

  resetState();
});

如果我禁用该条件，例如添加 && false，输入将在点击时获得焦点。我需要找到一种方法来禁用来自外部输入的此事件绑定 angular-touch lib.

Answer 1

下面的指令应用于 ui-select 父指令，解决了问题：

app.directive('fixFocusOnTouch', function(){
  return {
    restrict: 'A',
    controller: function( $element ){
      /*
      Usually, event handlers binding are made in the link function.
      But we need this handler to be executed first, so we add it in the controller function instead.
       */
      var inputElement = $element[0].querySelector( 'input.ui-select-search' );
      angular.element( inputElement ).bind( 'touchend', function( event ){
        event.stopImmediatePropagation();
      });
    }
  }
});

它会在 angular-touch 添加的处理程序可以执行之前终止 touchend 事件的当前传播（请参阅问题的 "update" 部分）。

我无法让它在 Plunkr 上运行，但我会再试一次以提供一个工作示例。

用法：

<ui-select multiple fix-focus-on-touch
           theme="select2"
           ng-model="multipleDemo.selection"
           reset-search-input="true"
           style="min-width: 300px;">
  <ui-select-match placeholder="Enter an adress...">
    {{$item.formatted_address}}
  </ui-select-match>
  <ui-select-choices repeat="address in addresses track by $index"
                     refresh="refreshAddresses($select.search)" 
                     refresh-delay="250">
    <div ng-bind-html="address.formatted_address | highlight: $select.search"></div>
  </ui-select-choices>
</ui-select>

ui-select 输入在点击时没有获得焦点：与 angular-touch 冲突

ui-select input does not get focus on click : conflict with angular-touch

javascript

angularjs

angularjs-ng-touch

ui-select

angular-ui-select