我正在编写一个模拟旅行体验的程序,其中用户可以在视图中输入城市名称(以 MVC 风格编写程序),然后用户被“传送”到用图片、信息表示城市的视图等等
如前所述,该程序是用 MVC 编写的,我的主要问题如下:
我制作了一个全局按钮(不确定这是否是正确的定义,但从技术上讲,该按钮也应该出现在我想要的每个视图中),如果单击它会将用户带回开始视图(用户可以在其中输入新的城市名称ETC)。
我的问题是该按钮仅出现在其中一个视图中(除了名称不同之外,它们在代码中完全相似)而不出现在其他视图中。
这是在我的 Main.as 中创建按钮的代码(它依赖于一个单独的类来赋予它大小等):
private function initMVC():void{
goBackButton = new Button("Back");
goBackButton.addEventListener(MouseEvent.CLICK, goBackButtonHandler);
goToDestinationButton = new Button("");
goToDestinationButton.addEventListener(MouseEvent.CLICK, goToDestionationButtonHandler);
// Create the MODEL
_model = new Model();
// Create the CONTROLLERs which holds a reference of the MODEL
_controller1 = new Controller1(_model);
_controller2 = new Controller2(_model);
// Create the VIEWs which holds references of both MODEL and CONTROLLER
_view1 = new startView(_model, _controller1, goToDestinationButton);
_view2 = new parisView(_model, _controller2, goBackButton);
_view3 = new berlinView(_model, _controller2, goBackButton);
_view4 = new copenhagenView(_model, _controller2, goBackButton);
//add starting VIEW to Stage
this.addChild(_view1);
}
private function goBackButtonHandler(event:MouseEvent):void
{
this.removeChildAt(0);
this.addChild(_view1);
}
private function goToDestionationButtonHandler(event:MouseEvent):void
{
if (_model.name == "PARIS"){
trace("Switching to View: Paris");
this.removeChildAt(0);
this.addChild(_view2);
}
else if (_model.name == "BERLIN"){
trace("Switching to View: Berlin");
this.removeChildAt(0);
this.addChild(_view3);
}
else if (_model.name == "COPENHAGEN"){
trace("Switching to View: Copenhagen");
this.removeChildAt(0);
this.addChild(_view4);
}
else{
trace("We do not have that destination in our system yet, come back later.");
}
以下是为代表城市而创建的视图之一的示例:
public class berlinView extends Sprite
{
private var _navButton:Button;
private var _model:Model;
private var _controller:Controller2
private var nametextField:TextField;
public function berlinView(model:Model, controller:Controller2, navigationButton:Button)
{
_model= model;
_controller = controller
var atextField:TextField = new TextField();
atextField.text = "This is Berlin";
this.addChild(atextField);
_navButton = navigationButton;
_navButton.x = 100;
_navButton.y = 100;
this.addChild(_navButton);
}
}
}
我可能忽略了一些非常简单或基本的东西,因为它是我的第一个“真正的”AS3 程序。希望有人能帮忙!
提前致谢!