Sharepoint SP.Ribbon.WebPartComponent.getWebPartAdder（）返回未定义的

我正在使用源代码处理用户web部件按钮单击事件

函数“addWebPart（）”调用函数“SP.Ribbon.WebPartComponent.getWebPartAdder（）”，该函数本应返回加法器实例，但有时返回未定义的

如果我添加一个while循环以等待实例值正确返回，那么VM中的浏览器会暂停一段时间。返回实例后，浏览器将再次响应。这只在某些情况下发生

我正在使用SharePoint 2013，我所指的代码部分是：

addWebPart = function (wpCategory, wpTitle) {

            var webPartAdder = SP.Ribbon.WebPartComponent.getWebPartAdder();

            while (webPartAdder == undefined)
                webPartAdder = SP.Ribbon.WebPartComponent.getWebPartAdder();

            // ... Other stuff ...
}

---

如何解决此问题？

对于任何想找到此问题答案的人，您必须调用“loadwPaderOnDemand（）”函数，然后等待事件“\u spEventWebPartAdderReady”。然后查询“window.WPAdder”：

    addWebPartDelayed = function (webPartAdder, wpCategory, wpTitle) {

        var webPart = findWebPart(webPartAdder, wpCategory, wpTitle);
        if (webPart) {
            var zone = WPAdder._zones[0];
            var wpid = WPAdder._createWebpartPlaceholderInRte();
            WPAdder.addItemToPageByItemIdAndZoneId(webPart.id, zone.id, 0, wpid);
        }
        else
            alert('ERROR: Web part not found! Please try again after sometime.');
    },

    addWebPart = function (wpCategory, wpTitle) {

        var webPartAdder = window.WPAdder;

        if (webPartAdder == undefined) {
            LoadWPAdderOnDemand();
            ExecuteOrDelayUntilEventNotified(
                function () {
                    var webPartAdder = window.WPAdder;

                    addWebPartDelayed(webPartAdder, wpCategory, wpTitle);
                },
                "_spEventWebPartAdderReady");
        }
        else
            addWebPartDelayed(webPartAdder, wpCategory, wpTitle);            
    };

---

对于任何想找到这个问题答案的人来说，您必须调用'LoadWPAdderOnDemand（）'函数，然后等待事件'\u spEventWebPartAdderReady'。然后查询“window.WPAdder”：

    addWebPartDelayed = function (webPartAdder, wpCategory, wpTitle) {

        var webPart = findWebPart(webPartAdder, wpCategory, wpTitle);
        if (webPart) {
            var zone = WPAdder._zones[0];
            var wpid = WPAdder._createWebpartPlaceholderInRte();
            WPAdder.addItemToPageByItemIdAndZoneId(webPart.id, zone.id, 0, wpid);
        }
        else
            alert('ERROR: Web part not found! Please try again after sometime.');
    },

    addWebPart = function (wpCategory, wpTitle) {

        var webPartAdder = window.WPAdder;

        if (webPartAdder == undefined) {
            LoadWPAdderOnDemand();
            ExecuteOrDelayUntilEventNotified(
                function () {
                    var webPartAdder = window.WPAdder;

                    addWebPartDelayed(webPartAdder, wpCategory, wpTitle);
                },
                "_spEventWebPartAdderReady");
        }
        else
            addWebPartDelayed(webPartAdder, wpCategory, wpTitle);            
    };

---

对于任何想找到这个问题答案的人来说，您必须调用'LoadWPAdderOnDemand（）'函数，然后等待事件'\u spEventWebPartAdderReady'。然后查询“window.WPAdder”：

    addWebPartDelayed = function (webPartAdder, wpCategory, wpTitle) {

        var webPart = findWebPart(webPartAdder, wpCategory, wpTitle);
        if (webPart) {
            var zone = WPAdder._zones[0];
            var wpid = WPAdder._createWebpartPlaceholderInRte();
            WPAdder.addItemToPageByItemIdAndZoneId(webPart.id, zone.id, 0, wpid);
        }
        else
            alert('ERROR: Web part not found! Please try again after sometime.');
    },

    addWebPart = function (wpCategory, wpTitle) {

        var webPartAdder = window.WPAdder;

        if (webPartAdder == undefined) {
            LoadWPAdderOnDemand();
            ExecuteOrDelayUntilEventNotified(
                function () {
                    var webPartAdder = window.WPAdder;

                    addWebPartDelayed(webPartAdder, wpCategory, wpTitle);
                },
                "_spEventWebPartAdderReady");
        }
        else
            addWebPartDelayed(webPartAdder, wpCategory, wpTitle);            
    };

---

对于任何想找到这个问题答案的人来说，您必须调用'LoadWPAdderOnDemand（）'函数，然后等待事件'\u spEventWebPartAdderReady'。然后查询“window.WPAdder”：

    addWebPartDelayed = function (webPartAdder, wpCategory, wpTitle) {

        var webPart = findWebPart(webPartAdder, wpCategory, wpTitle);
        if (webPart) {
            var zone = WPAdder._zones[0];
            var wpid = WPAdder._createWebpartPlaceholderInRte();
            WPAdder.addItemToPageByItemIdAndZoneId(webPart.id, zone.id, 0, wpid);
        }
        else
            alert('ERROR: Web part not found! Please try again after sometime.');
    },

    addWebPart = function (wpCategory, wpTitle) {

        var webPartAdder = window.WPAdder;

        if (webPartAdder == undefined) {
            LoadWPAdderOnDemand();
            ExecuteOrDelayUntilEventNotified(
                function () {
                    var webPartAdder = window.WPAdder;

                    addWebPartDelayed(webPartAdder, wpCategory, wpTitle);
                },
                "_spEventWebPartAdderReady");
        }
        else
            addWebPartDelayed(webPartAdder, wpCategory, wpTitle);            
    };