javascript - 打开/关闭模态窗口会触发窗口调整大小

Question

在我的 Angular 应用程序中，我使用模态窗口作为过滤器/选择器，并且有许多组件与窗口调整大小事件绑定(bind)，如 SVG、wordcloud 等。每当我打开或关闭模态窗口时，它都会触发窗口调整大小事件，该事件导致重新加载所有这些组件(图表)..

有没有一种方法可以在打开或关闭模态窗口时停止触发窗口调整大小事件......？..我用谷歌搜索并找到了一个关于这个问题的线程，它仍然是开放的..

https://github.com/driftyco/ionic/issues/2309

Answer 1

window.resize 是由框架本身有意触发的 -- from the source: ionic.trigger('resize'); .

解决方案

选项1

您可以只注释掉上面提到的行并创建您自己的 ionic 框架包。

选项2

您可以通过复制和修改源代码，使用装饰器来完全替换$ionicModal服务。让我知道是否有任何不清楚的地方。我个人更喜欢这个选项，因为从长远来看，它应该更容易维护，并且可以让您进一步自定义模态的行为。

HERE是我的意思的一个例子:

.config(function($provide){
  $provide.decorator('$ionicModal',function($rootScope, $ionicBody, $compile, $timeout, $ionicPlatform, $ionicTemplateLoader, $q, $log) {

    var PLATFORM_BACK_BUTTON_PRIORITY_MODAL = 200;

    var delegate = (function(){

  /**
   * @ngdoc controller
   * @name ionicModal
   * @module ionic
   * @description
   * Instantiated by the {@link ionic.service:$ionicModal} service.
   *
   * Be sure to call [remove()](#remove) when you are done with each modal
   * to clean it up and avoid memory leaks.
   *
   * Note: a modal will broadcast 'modal.shown', 'modal.hidden', and 'modal.removed' events from its originating
   * scope, passing in itself as an event argument. Note: both modal.removed and modal.hidden are
   * called when the modal is removed.
   */
  var ModalView = ionic.views.Modal.inherit({
    /**
     * @ngdoc method
     * @name ionicModal#initialize
     * @description Creates a new modal controller instance.
     * @param {object} options An options object with the following properties:
     *  - `{object=}` `scope` The scope to be a child of.
     *    Default: creates a child of $rootScope.
     *  - `{string=}` `animation` The animation to show & hide with.
     *    Default: 'slide-in-up'
     *  - `{boolean=}` `focusFirstInput` Whether to autofocus the first input of
     *    the modal when shown.  Default: false.
     *  - `{boolean=}` `backdropClickToClose` Whether to close the modal on clicking the backdrop.
     *    Default: true.
     *  - `{boolean=}` `hardwareBackButtonClose` Whether the modal can be closed using the hardware
     *    back button on Android and similar devices.  Default: true.
     */
    initialize: function(opts) {
      ionic.views.Modal.prototype.initialize.call(this, opts);
      this.animation = opts.animation || 'slide-in-up';
    },

    /**
     * @ngdoc method
     * @name ionicModal#show
     * @description Show this modal instance.
     * @returns {promise} A promise which is resolved when the modal is finished animating in.
     */
    show: function(target) {
      var self = this;

      if (self.scope.$$destroyed) {
        $log.error('Cannot call ' +  self.viewType + '.show() after remove(). Please create a new ' +  self.viewType + ' instance.');
        return;
      }

      var modalEl = angular.element(self.modalEl);

      self.el.classList.remove('hide');
      $timeout(function() {
        $ionicBody.addClass(self.viewType + '-open');
      }, 400);

      if (!self.el.parentElement) {
        modalEl.addClass(self.animation);
        $ionicBody.append(self.el);
      }

      if (target && self.positionView) {
        self.positionView(target, modalEl);
        // set up a listener for in case the window size changes
        ionic.on('resize',function() {
          ionic.off('resize',null,window);
          self.positionView(target,modalEl);
        },window);
      }

      modalEl.addClass('ng-enter active')
             .removeClass('ng-leave ng-leave-active');

      self._isShown = true;
      self._deregisterBackButton = $ionicPlatform.registerBackButtonAction(
        self.hardwareBackButtonClose ? angular.bind(self, self.hide) : angular.noop,
        PLATFORM_BACK_BUTTON_PRIORITY_MODAL
      );

      self._isOpenPromise = $q.defer();

      ionic.views.Modal.prototype.show.call(self);

      $timeout(function() {
        modalEl.addClass('ng-enter-active');
      //  ionic.trigger('resize');
        self.scope.$parent && self.scope.$parent.$broadcast(self.viewType + '.shown', self);
        self.el.classList.add('active');
        self.scope.$broadcast('$ionicHeader.align');
      }, 20);

      return $timeout(function() {
        //After animating in, allow hide on backdrop click
        self.$el.on('click', function(e) {
          if (self.backdropClickToClose && e.target === self.el) {
            self.hide();
          }
        });
      }, 400);
    },

    /**
     * @ngdoc method
     * @name ionicModal#hide
     * @description Hide this modal instance.
     * @returns {promise} A promise which is resolved when the modal is finished animating out.
     */
    hide: function() {
      var self = this;
      var modalEl = angular.element(self.modalEl);

      self.el.classList.remove('active');
      modalEl.addClass('ng-leave');

      $timeout(function() {
        modalEl.addClass('ng-leave-active')
               .removeClass('ng-enter ng-enter-active active');
      }, 20);

      self.$el.off('click');
      self._isShown = false;
      self.scope.$parent && self.scope.$parent.$broadcast(self.viewType + '.hidden', self);
      self._deregisterBackButton && self._deregisterBackButton();

      ionic.views.Modal.prototype.hide.call(self);

      // clean up event listeners
      if (self.positionView) {
        ionic.off('resize',null,window);
      }

      return $timeout(function() {
        $ionicBody.removeClass(self.viewType + '-open');
        self.el.classList.add('hide');
      }, self.hideDelay || 320);
    },

    /**
     * @ngdoc method
     * @name ionicModal#remove
     * @description Remove this modal instance from the DOM and clean up.
     * @returns {promise} A promise which is resolved when the modal is finished animating out.
     */
    remove: function() {
      var self = this;
      self.scope.$parent && self.scope.$parent.$broadcast(self.viewType + '.removed', self);

      return self.hide().then(function() {
        self.scope.$destroy();
        self.$el.remove();
      });
    },

    /**
     * @ngdoc method
     * @name ionicModal#isShown
     * @returns boolean Whether this modal is currently shown.
     */
    isShown: function() {
      return !!this._isShown;
    }
  });

  var createModal = function(templateString, options) {
    // Create a new scope for the modal
    var scope = options.scope && options.scope.$new() || $rootScope.$new(true);

    options.viewType = options.viewType || 'modal';

    angular.extend(scope, {
      $hasHeader: false,
      $hasSubheader: false,
      $hasFooter: false,
      $hasSubfooter: false,
      $hasTabs: false,
      $hasTabsTop: false
    });

    // Compile the template
    var element = $compile('<ion-' + options.viewType + '>' + templateString + '</ion-' + options.viewType + '>')(scope);

    options.$el = element;
    options.el = element[0];
    options.modalEl = options.el.querySelector('.' + options.viewType);
    var modal = new ModalView(options);

    modal.scope = scope;

    // If this wasn't a defined scope, we can assign the viewType to the isolated scope
    // we created
    if (!options.scope) {
      scope[ options.viewType ] = modal;
    }

    return modal;
  };

  return {
    /**
     * @ngdoc method
     * @name $ionicModal#fromTemplate
     * @param {string} templateString The template string to use as the modal's
     * content.
     * @param {object} options Options to be passed {@link ionic.controller:ionicModal#initialize ionicModal#initialize} method.
     * @returns {object} An instance of an {@link ionic.controller:ionicModal}
     * controller.
     */
    fromTemplate: function(templateString, options) {
      var modal = createModal(templateString, options || {});
      return modal;
    },
    /**
     * @ngdoc method
     * @name $ionicModal#fromTemplateUrl
     * @param {string} templateUrl The url to load the template from.
     * @param {object} options Options to be passed {@link ionic.controller:ionicModal#initialize ionicModal#initialize} method.
     * options object.
     * @returns {promise} A promise that will be resolved with an instance of
     * an {@link ionic.controller:ionicModal} controller.
     */
    fromTemplateUrl: function(url, options, _) {
      var cb;
      //Deprecated: allow a callback as second parameter. Now we return a promise.
      if (angular.isFunction(options)) {
        cb = options;
        options = _;
      }
      return $ionicTemplateLoader.load(url).then(function(templateString) {
        var modal = createModal(templateString, options || {});
        cb && cb(modal);
        return modal;
      });
    }
  }


    })();
    console.log(delegate);

    return delegate;

  });
})

注意

改变行为可能一些不需要的副作用，但我不太了解 ionic 框架。此外，如果有任何负面影响，那么肯定是框架本身的糟糕设计，因为一般事件不应该用于框架特定目的。如果我有更多时间，我将尝试制作一个 PR 以可选地触发事件。