嗨,每次单击按钮时,我都需要帮助使用来自 json 模型的新值更新视图中的标签。如何在 SAPUI5 中做到这一点?
您可以看到有一个问题文本和答案文本来自问卷模型,我想从 data[0].question.text 更新到 data1.question.text,它显示在我的工具栏文本中。如何在SAPUI5中实现这一目标?
我是否对问题文本使用了工具工具栏标题,对选项使用了不同的标签?这是正确的方法吗?我能否更新工具栏标题文本?
请找到以下代码:
应用视图.xml
<mvc:View xmlns:mvc="sap.ui.core.mvc" xmlns="sap.m" xmlns:l="sap.ui.layout" xmlns:f="sap.ui.layout.form" xmlns:core="sap.ui.core"
displayBlock="true" controllerName="opensap.onlinequestionnaire.controller.App" height="100%">
<Page title="Online Questionnaire" class="sapUiContentPadding" id="myPage">
<headerContent>
<Button icon="sap-icon://action" tooltip="Share"/>
</headerContent>
<subHeader/>
<content>
<VBox class="sapUiSmallMargin">
<f:SimpleForm id="SimpleFormToolbar" layout="ResponsiveGridLayout">
<f:toolbar>
<Toolbar id="TB1">
<Title text="Question 1" level="H4" titleStyle="H4"/>
<ToolbarSpacer/>
<Button icon="sap-icon://drop-down-list"/>
</Toolbar>
</f:toolbar>
<f:content>
<Toolbar design="Solid">
<Title text="{questionnaire>/data/0/question/text}" level="H5" titleStyle="H5" textAlign="Center" id="questionText"/>
</Toolbar>
<VBox id="multipleChoiceHolder">
<HBox id="answerRow1">
<HBox width="700px" backgroundDesign="Solid" alignItems="Center" id="mCHorHolder1"><CheckBox id="checkBox1"/><Label text="Dogs" id="multipleChoice1"/></HBox>
<HBox width="700px" backgroundDesign="Solid" alignItems="Center" id="mCHorHolder2"><CheckBox id="checkBox2"/><Label text="Cats" id="multipleChoice2"/></HBox>
</HBox>
<HBox id="answerRow2">
<HBox width="700px" backgroundDesign="Solid" alignItems="Center" id="mCHorHolder3"><CheckBox id="checkBox3"/><Label text="Rabbits" id="multipleChoice3"/></HBox>
<HBox width="700px" backgroundDesign="Solid" alignItems="Center" id="mCHorHolder4"><CheckBox id="checkBox4"/><Label text="Hamsters" id="multipleChoice4"/></HBox>
</HBox>
</VBox> </f:content>
</f:SimpleForm>
</VBox>
</content>
<footer>
<Toolbar id="toolBar">
<Button text="Previous" type="Emphasized" width="300px" press="goToPrevious" icon="sap-icon://navigation-left-arrow" id="previousButton"/>
<ToolbarSpacer/>
<Button text="Next" type="Emphasized" width="300px" press="goToNext" icon="sap-icon://navigation-right-arrow" iconFirst="false"
id="nextButton"/>
</Toolbar>
</footer>
</Page>
问卷.json
{ data: [{
"question": "Which pet do you like from the following?",
"answers": ["Cats", "Rabbits", "Dogs", "Hamsters"],
"correct": 1
}, {
"question": "Which pet do you prefer from the following?",
"answers": ["Cats", "Dogs"],
"correct": 1
}, {
"question": "What food brand does your pet eat?",
"answers": ["Pedigree", "Catfood", "Rabbitfood", "HamstersFood"],
"correct": 1
}]
}
应用程序控制器.js
sap.ui.define([
"sap/ui/core/mvc/Controller"
], function(Controller){
Controller.extend("opensap.onlinequestionnaire.controller.App", {
goToPrevious:function(){
alert("Previous Question");
},
goToNext:function(){
alert("Next Question");
}
});
});
我的前端看起来像这样: 我的前端看起来像这样:
我建议您存储当前索引或为当前选择的问题创建单独的模型。 例如
this.getView().setModel(new JSONModel({
index: false,
question: {}
}), 'currentQuestion');
您可以定义一个方法来初始化和/或获取下一个元素
initOrSetNext: function() {
var oCurrentQuestionModel = this.getView().getModel('currentQuestion');
var oQuestionModel = this.getView().getModel('questionnaire');
var iCurrentIndex = oCurrentQuestionModel.getProperty('/index');
// if run first time set to 0 - else increase by one
iCurrentIndex = iCurrentIndex ? ++iCurrentIndex : 0;
var oCurrent = {
index : iCurrentIndex,
question: oQuestionModel.getProperty('/data/' + iCurrentIndex);
}
oCurrentQuestionModel.setProperty('/', oCurrent);
}
答案已更新(上图(以显示停止。
缺少什么:在加载之前检查下一个索引是否存在