在我的应用程序中，后退导航无法从第二个视图（plant.view.xml）运行到第一个视图（input.view.xml）。你能检查一下，让我知道是什么问题吗？我可以从第一个视图向前导航到第二个视图但不能向后导航。
<mvc:View
controllerName="stock.controller.plant"
xmlns="sap.m"
xmlns:viz="sap.viz.ui5.controls"
xmlns:l="sap.ui.layout"
xmlns:mvc="sap.ui.core.mvc">
<MessagePage
showNavButton="true"
navButtonPress="onNavBack"/>
<Table id="idProductsTable"
inset="false"
items="{
path: '/ProductCollection',
sorter: {
path: 'Name'
}
}">
<headerToolbar>
<Toolbar>
<Title text="Products" level="H2" />
</Toolbar>
</headerToolbar>
<columns>
<Column width="12em">
<Text text="Product" />
</Column>
<Column
minScreenWidth="Tablet"
demandPopin="true">
<Text text="Supplier" />
</Column>
<Column
minScreenWidth="Tablet"
demandPopin="true"
hAlign="End">
<Text text="Dimensions" />
</Column>
<Column
minScreenWidth="Tablet"
demandPopin="true"
hAlign="Center">
<Text text="Weight" />
</Column>
<Column hAlign="End">
<Text text="Price" />
</Column>
</columns>
<items>
<ColumnListItem>
<ObjectIdentifier
title="{Name}"
text="{ProductId}" />
<Text text="{SupplierName}" />
<Text text="{Width} x {Depth} x {Height} {DimUnit}" />
<ObjectNumber
number="{WeightMeasure}"
unit="{WeightUnit}"
state="{
parts: [
{path: 'WeightMeasure'},
{path: 'WeightUnit'}
],
formatter: 'stock.Formatter.weightState'
}" />
<ObjectNumber
number="{
parts: [{
path: 'Price'
},{
path: 'CurrencyCode'
}],
type: 'sap.ui.model.type.Currency',
formatOptions: {
showMeasure: false
}
}"
unit="{CurrencyCode}" />
</ColumnListItem>
</items>
</Table>
</MessagePage>
</mvc:View>
sap.ui.define([
"sap/ui/core/mvc/Controller",
"jquery.sap.global",
"stock/Formatter",
"sap/ui/core/routing/History",
"sap/ui/model/json/JSONModel"
], function(Controller, jQuery, Formatter, History, JSONModel) {
"use strict";
var TableController = Controller.extend("stock.controller.plant", {
onInit: function () {
// set explored app's demo model on this sample
var oModel = new JSONModel(jQuery.sap.getModulePath("sap.ui.demo.mock", "/products.json"));
this.getView().setModel(oModel);
},
getRouter : function () {
return sap.ui.core.UIComponent.getRouterFor(this);
},
onNavBack: function () {
var oHistory, sPreviousHash;
oHistory = History.getInstance();
sPreviousHash = oHistory.getPreviousHash();
if (sPreviousHash !== undefined) {
window.history.go(-1);
} else {
this.getRouter().navTo("input", {}, true);
}
}
});
return TableController;
});
{
"_version": "1.1.0",
"sap.app": {
"_version": "1.1.0",
"id": "stock",
"type": "application",
"i18n": "i18n/i18n.properties",
"title": "{{appTitle}}",
"description": "{{appDescription}}",
"applicationVersion": {
"version": "1.0.0"
}
},
"sap.ui": {
"_version": "1.1.0",
"technology": "UI5",
"deviceTypes": {
"desktop": true,
"tablet": true,
"phone": true
},
"supportedThemes": [
"sap_belize"
]
},
"sap.ui5": {
"_version": "1.1.0",
"rootView": "stock.view.input",
"dependencies": {
"minUI5Version": "1.30",
"libs": {
"sap.m": {}
}
},
"models": {
"i18n": {
"type": "sap.ui.model.resource.ResourceModel",
"settings": {
"bundleName": "stock.i18n.i18n"
}
}
},
"routing": {
"config": {
"routerClass": "sap.m.routing.Router",
"viewType": "XML",
"viewPath": "stock.view",
"controlId": "app",
"controlAggregation": "pages",
"transition": "slide",
"bypassed": {
"target": [
"notFound"
]
},
"async": true
},
"routes": [{
"pattern": "",
"name": "input",
"target": "input"
}, {
"pattern": "plant",
"name": "plant",
"target": "plant"
}],
"targets": {
"input": {
"viewName": "input",
"viewId": "App",
"viewLevel" : 1
},
"plant": {
"viewName": "plant",
"viewId": "plant",
"viewLevel": 2,
"title": "{i18n>materialDetail}"
}
}
}
}
}