Appcelerator Studio LiveView重新编译错误

Question

当LiveView尝试重新编译时，不断收到此错误。有人能解释一下LiveView是如何工作的吗？对象"Alloy.Globals.layout.activityList“确实存在，但也许LiveView只重新编译了不存在合金全局变量的代码的一部分？

[ERROR] :  Script Error {
[INFO] :   {
[ERROR] :      column = 36;
[ERROR] :      line = 28;
[ERROR] :      message = "undefined is not an object (evaluating 'Alloy.Globals.layout.activityList')";

Appcelerator的"Movies“示例应用程序使用的逻辑与在Alloy.js中创建布局对象的逻辑相同。我正在做完全相同的事情，但是它弄乱了upp的重新编译大约10次中的8次。

/**
 * Calculate element dimensions for given screen size
 * @param {Object} size   containing width and height properties
 */
Alloy.Globals.calculateElementDimensions = function(size) {

  var layout = {};

  layout.device = {};
  layout.device.width = size.width;
  layout.device.height = size.height;

  // lists
  layout.activityList = {};
  layout.activityList.cell = {};

  layout.activityList.cell.width = size.width;
  layout.activityList.cell.height = 60;
  layout.activityList.cell.spacing = 1;

  layout.activityList.cell.dateView = {};
  layout.activityList.cell.dateView.width = layout.activityList.cell.height;
  layout.activityList.cell.dateView.height = layout.activityList.cell.height;

  layout.activityList.cell.detailsView = {};
  layout.activityList.cell.detailsView.width = (layout.activityList.cell.width - layout.activityList.cell.dateView.width) - 50;
  layout.activityList.cell.detailsView.height = layout.activityList.cell.height;

  layout.activityList.cell.deleteView = {};
  layout.activityList.cell.deleteView.width = size.width * 0.2;
  layout.activityList.cell.deleteView.right = (0 - layout.activityList.cell.deleteView.width);
  return layout;
};

// Calculate element dimentsions
Alloy.Globals.layout = Alloy.Globals.calculateElementDimensions(Alloy.Globals.Device);
Alloy.Globals.getCalculatedWidth = function(_percentage){
  return (Alloy.Globals.Device.width * (_percentage / 100));
};

#更新

我想我可能已经找到了触发错误的原因。这看起来实际上并不是运行新的更新代码的问题，而是在关闭和刷新之前有一个错误。

**[INFO] :   [LiveView] Reloading App**
[INFO] :   Login win close
[INFO] :   XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
[INFO] :   validateLogInInfo
[INFO] :   XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
[INFO] :   UI SHUTDOWN COMPLETE. TRYING TO RESUME RESTART
[INFO] :   XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
[INFO] :   RUNNING CODE IN ACTIVITIES.JS
[INFO] :   XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
**[ERROR] :  Script Error {
[ERROR] :      column = 36;
[ERROR] :      line = 42;
[ERROR] :      message = "undefined is not an object (evaluating 'Alloy.Globals.layout.device')";
[ERROR] :      stack = "Controller\ncreateController\nController\ncreateController\nvalidateLogInInfo\n";
[ERROR] :  }
Alloy.createController('login', {
    callback: validateLogInInfo
  }).getView().open();**

这个错误似乎与我在window.close事件处理程序中运行代码有关。例如，在一个控制器中，我这样做：

  Alloy.createController('login', {
    callback: validateLogInInfo
  }).getView().open();

在login.js中，我做到了：

$.win.addEventListener('close', function(){
  log('Login win close');
  args.callback();
});

我猜回调是在LiveView试图关闭和刷新时尝试运行的，因此出现了编译器错误。删除windoew.close事件中的回调将导致成功重新加载

[INFO] :   [LiveView] Reloading App
[INFO] :   Login win close
[INFO] :   UI SHUTDOWN COMPLETE. TRYING TO RESUME RESTART

那么，提供对其他控制器的关闭事件的回调是完全错误的吗？

Answer 1

是的，代码看起来是正确的。尝试在LiveView模式和跟踪控制台模式下运行应用程序，然后查看是否有其他原因导致此问题。

​

请参见图像以设置轨迹模式。