Nativescript - 點擊更新動態文本框源代碼

Question

我只想問一下按鈕單擊後如何更新動態文本框？文本字段是動態的，值應該來自可觀察的。

代碼隱藏

var observableModule = require("data/observable"); 
var source = new observableModule.Observable(); 

var HomePage = function() {}; 
HomePage.prototype = new BasePage(); 
HomePage.prototype.constructor = HomePage; 

HomePage.prototype.contentLoaded = function(args) { 
    var page = args.object; 

    source.textSource = "sample"; 

    var layout = page.getViewById("stackID"); 
    var textField = new TextFieldModule.TextField(); 

    var textFieldBindingOptions = { 
     sourceProperty: "textSource", 
     targetProperty: "text", 
     twoWay: false 
    }; 

    textField.bind(textFieldBindingOptions, source); 

    layout.addChild(textField); 
} 

HomePage.prototype.buttonTap = function() { 
    source.textSource = "new word"; 
    source.update(); 
} 

XML

<stack-layout loaded="contentLoaded" id="stackID"> 
    <Button tap="buttonTap" text="Update" /> 
</stack-layout> 

Answer 1

我能找到如何更新點擊的來源。

HomePage.prototype.onTap = function() { 
    source.set("textSource", "new word"); 
} 

來源：http://docs.nativescript.org/cookbook/data/observable