Question

在这里遇到一些麻烦，希望有人可以提供帮助。我有一个下拉菜单，我可以从现场获取数据，只有当保存功能触发时，它不会保存，信息为空。我试图设置函数返回字符串，只是我接受一个int来显示选择号，所以它不兼容。有什么想法吗？是的，字符串是公开的。

public string GetDropSelection(int index)
 {
     Debug.Log(index);
     switch (index)
     {
         case 1: BrakeWheelField="Front";
         break;

         case 2: BrakeWheelField="Rear";
         break;

         case 3: BrakeWheelField="Both";
         break;
     }
     return BrakeWheelField; //I know this technique doesn't work because what is coming in is not what's going out.
     Debug.Log("What is the selection?" + BrakeWheelField); //Variable has the value here.
 }

 public void GetBrakeData(string BrakeWheelField)
 {
     Debug.Log(BrakeWheelField); //By the time it gets to here, it's blank.

     BrakeDateofPurchaseField=BrakeDateofPurchaseText.text;
     BrakeMileageField=BrakeMileageText.text;
     BrakeLocationField=BrakeLocationText.text;
     BrakeLaborField=BrakeLaborText.text;
     BrakeBrandField= BrakeBrandText.text;
     BrakePriceField= BrakePriceText.text;
     BrakeNotesField = BrakeNotesText.text;

     DatabaseManager.Instance.SQLiteInit();
     DatabaseManager.Instance.SaveBrakeInfo(BrakeDateofPurchaseField, BrakeMileageField, BrakeLocationField, BrakeLaborField, BrakeBrandField, BrakePriceField, BrakeWheelField, BrakeNotesField);

 }

提前致谢！

Answer 1

在您的switch语句中添加values以查看您是否获得了1,2或3以外的索引 - 就像这样。

default

如果您希望默认为该答案，请将默认值添加到其他一种情况。如

 switch (index)
 {
     case 1: BrakeWheelField="Front";
     break;

     case 2: BrakeWheelField="Rear";
     break;

     case 3: BrakeWheelField="Both";
     break;

     default:
          Debug.Log("GroupDropSelection invalid index: "+index);
     break;
 }

单独回答，但我会将其保留在同一篇文章中。

 switch (index)
 {
     default: // Make "Front" the default for other cases than 1,2or3
     case 1: BrakeWheelField="Front";
     break;

     case 2: BrakeWheelField="Rear";
     break;

     case 3: BrakeWheelField="Both";
     break;
 }

中的

BrakeWheelField不是您的全局变量，而是在GetBrakeData的参数中传递的局部变量。如果您为GetBrakeData提供空值，那么方法中的GetBrakeData也是如此。在BrakeWheelField中，如果您在Debug.Log之前加BrakeWheelData，您将获得全局值。看我的编辑：

this.

将下拉菜单保存到Unity3d中的SQLite数据库

1 个答案: