关闭后如何清除对话框/xmlfragment 内容? [英] How to clear dialog/xmlfragment content after close?

问题描述

我的对话被定义为文档:

  onOpenDialog : function () {
     var oView = this.getView();
     var oDialog = oView.byId("helloDialog");
     // create dialog lazily
     if (!oDialog) {
        // create dialog via fragment factory
        oDialog = sap.ui.xmlfragment(oView.getId(), "sap.ui.demo.wt.view.HelloDialog");
        oView.addDependent(oDialog);
     }


     oDialog.open();
  }

假设这个对话框有很多 Input/Select/ComboBox 等，用户在里面输入，关闭，导航到另一个主条目和详细信息页面，再次打开这个对话框实例，信息仍然在这里.如果我想在每次用户关闭时清除信息/输入怎么办?

Let's say this dialog has many Input/Select/ComboBox and so on, user inputs in it, close, nav to another master item and detail page, open this dialog instance again, and the information is still here. What if I want to clear the information/inputs every time user closes it?

关闭后销毁此对话框是解决此问题的唯一方法吗?

Is destroy this dialog after close the only way to solve this?

推荐答案

Dialog XML

<Dialog afterClose="dialogAfterclose" >
    <beginButton>
        <Button text="yes" press="confirmOk"/>
    </beginButton>
    <endButton>
        <Button text="no" press="confirmCancel"/>
    </endButton>
</Dialog>

创建对话框

if(!this._oDialog){
    this._oDialog = sap.ui.xmlfragment("idFragment","Path_to_your_Dialog", this);           
}

你需要使用sap.ui.core.Element的destroy().

dialogAfterclose: function(oEvent) {
    this._oDialog.destroy();
}

根据您的代码

onOpenDialog : function () {
  var oView = this.getView();
  if (!this._oDialog) {
      this._oDialog = sap.ui.xmlfragment(oView.getId(), "sap.ui.demo.wt.view.HelloDialog");
      oView.addDependent(this._oDialog);
  }
  this._oDialog.open();
},     
dialogAfterclose: function(oEvent) {//function called after Dialog is closed
   this._oDialog.destroy();//destroy only the content inside the Dialog
},
confirmOk: function(oEvent) {
    this._oDialog.close();//Just close the Dialog, Dialog afterClose() will be called and destroy the Dialog content.
}

参考:sap.ui.core.Element - destroy()

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