javascript - 异步加载片段时如何使用 `oEvent`？

Question

使用此代码时，我可以使用 oEvent:

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，我尝试使用 Fragment.load 更改它，但我无法从函数中获取 oEvent。有什么想法吗？

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

如 linked answer 中所述上面，oEvent执行事件处理程序 (onPressDialog) 后，参数将完全重置。 IE。在异步获取片段后，oEvent对象将不再包含相同的引用/参数值。在创建片段之前尝试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。

鉴于<Dialog id="myDialog"> 在片段定义中:

从 UI5 1.93 开始

^{使用 API oController.loadFragment}

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 API Fragment.load}

onPressDialog: async function(oEvent) {
  const myEventValue = oEvent.get/*...*/; // to use later without relying on oEvent
  let oDialog = this.byId("myDialog");
  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();
},