为什么我的主控制器被调用了两次? [英] Why Is My Main Controller Being Called Twice?

问题描述

所有其他路由都很好，但由于某种原因主控制器被调用了两次.为什么会发生这种情况?

All other routings are fine, but for some reason the main controller is being called twice. Why would this happen?

onInit: function() {
  var oRouter = this.getOwnerComponent().getRouter();
  oRouter.getRoute("main").attachMatched(this._onRouteMatched, this);
  this.getView().setModel(new JSONModel({
    Jobs: []
  }), "job");
},

这与路由配置有关吗?

"rootView": {
  "viewName": "CompleteSurvey.view.Main",
  "type": "XML"
},
"routing": {
  "routes": [{
    "name": "main",
    "pattern": "",
    "target": ["main"]
  }],
  "config": {
    "routerClass": "sap.m.routing.Router",
    "viewType": "XML",
    "viewPath": "CompleteSurvey.view",
    "controlId": "app",
    "controlAggregation": "pages"
  },
  "targets": {
    "main": {
      "viewName": "Main"
    }
  }
}

推荐答案

你的 Main 控制器被创建两次的原因是因为它的视图被创建了两次.

The reason why your Main controller is created twice is because its view is created twice.

1. 您的组件获取 manifest.json 并查看 rootView 以创建指定的视图 ("CompleteSurvey.view.Main").
2. 你的路由器被初始化，看到当前的哈希/模式是 ""，并再次创建相应的视图，即 "Main" 视图.

1. Your Component fetches manifest.json and looks at the rootView to create the assigned view ("CompleteSurvey.view.Main").
2. Your router gets initialized, sees that the current hash / pattern is "", and creates the corresponding view which is the "Main" view again.

当前的最佳做法是拥有一个单独的根视图.您可以为 "" 模式保留 Main，但避免再次使用相同的视图作为根视图.

The current best practice is to have a separate root view. You can keep the Main for the "" pattern, but avoid using the same view again as a root view.

如需进一步参考，请查看教程导航和路由 和 这个答案.

For further references, take a look at the tutorial Navigation and Routing and this answer.

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