异步加载片段时如何使用`oEvent`？

Question

oEvent使用此代码时我可以使用：onPressDialog: function(oEvent) {    if (!this._oDialog) {        this._oDialog= sap.ui.xmlfragment("idDialog", "com.Dialog", this);        this.getView().addDependent(this._oDialog);    }    this._oDialog.setBindingContext(oEvent.getSource().getParent().getBindingContext());    this._oDialog.open();},但是，我正在尝试使用它来更改它Fragment.load，但我无法oEvent从该函数中获取它。任何想法？onPressDialog: function(oEvent) {    if (!this._oDialog) {        Fragment.load({ // Fragment required from "sap/ui/core/Fragment"            id: this.getView().getId(),            name: "com.Dialog",            controller: this        }).then(function(oDialog) {            this.getView().addDependent(oDialog);            oDialog.setBindingContext(/*Can't access the right oEvent values here*/);            oDialog.open();        }.bind(this));    }},

Answer 1

oEvent在事件处理程序（onPressDialog）执行后，参数被完全重置。即异步获取片段后，该oEvent对象将不再包含相同的引用/参数值。尝试在创建片段之前将目标引用存储在闭包变量中，然后在最终解决 Promise 时使用该变量。

<Dialog id="myDialog">片段定义中给出：

从 UI5 1.93 开始

^{使用APImyController.loadFragment （推荐）}

onPressDialog: async function(oEvent) {

  const myEventValue = oEvent.get/*...*/; // to use later without relying on oEvent

  const oDialog = this.byId("myDialog") || await this.loadFragment({ name: "com.Dialog" });

  // ... Do something with myEventValue ...

  oDialog.open();

},

从 UI5 1.58 开始

^{使用APIFragment.load}

onPressDialog: async function(oEvent) {

  const myEventValue = oEvent.get/*...*/; // to use later without relying on oEvent

  let oDialog = this.byId("myDialog");

  this.getOwnerComponent().runAsOwner(function() {

    if (!oDialog) {

      oDialog = await Fragment.load({ // Fragment required from "sap/ui/core/Fragment"

        id: this.getView().getId(),

        name: "com.Dialog",

        controller: this,

      });

      this.getView().addDependent(oDialog);

    }

    // ... Do something with myEventValue ...

    oDialog.open();

  }.bind(this));

},