学步园

折腾了一天终于把CAknPopupFieldText在表单中动态创建及动态增加数组列表的操作搞定，主要分为以下几步：

１、定义资源文件

RESOURCE ARRAY r_settings_choice_std
    {
    items =
        {
        LBUF
            {
            txt = qtn_appl_test;
            },
        LBUF
   {
   txt=qtn_appl_help;
   }
  };
    }
   
RESOURCE POPUP_FIELD_TEXT r_popup_dynamic_question {
 popupfield = POPUP_FIELD {
  width = 10;  
 }; 
 textarray = r_settings_choice_std;
 active = 0;
}

２、在CAknForm字类中增加变量

 CDesCArray *iItemArray;
 CAknQueryValueTextArray *iTextArray;
 CAknQueryValueText *iQueryValText;

３、PreLayoutDynInitL（）函数中增加以下代码

//增加一个CAknPopupFieldText控件

 HBufC* buftemp=StringLoader::LoadLC(QTN_NAVI_LABEL_CONTACTGROUPVIEW); 
 CCoeControl* popupControl = CreateLineByTypeL(*buftemp, ActivePageId(), iNewItemId, EAknCtPopupFieldText, NULL );
 CAknPopupFieldText* popupQuestion = static_cast<CAknPopupFieldText*>(popupControl);
 TResourceReader reader;

 CEikonEnv::Static()->CreateResourceReaderLC(reader, R_POPUP_DYNAMIC_QUESTION);
 popupQuestion->ConstructFromResourceL(reader);
 CleanupStack::PopAndDestroy(2); //reader
 Line(iNewItemId)->SetTakesEnterKey(ETrue);
 Line(iNewItemId)->SetOfferHotKeys(ETrue);

//动态生成CAknPopupFieldText里显示的数组内容

 CAknPopupField* popupField =popupQuestion;
 int ncount=iContactDb->GetGroupCount();
 iItemArray = new (ELeave) CDesCArrayFlat(ncount);
 for(int i=0;i<ncount;i++)
 {
  iItemArray->AppendL(iContactDb->GetGroupAt(i));
 }

 iTextArray = CAknQueryValueTextArray::NewL();
 iTextArray->SetArray( *iItemArray );
 iQueryValText = CAknQueryValueText::NewL();
 iQueryValText->SetArrayL( iTextArray );
 iQueryValText->SetCurrentValueIndex( 0 );
 popupField->SetQueryValueL( iQueryValText );

 iNewItemId++;

４、在析构函数中删除动态生成的内容

 if(iItemArray)
 {
  iItemArray->Reset();
  delete iItemArray;
  iItemArray=NULL;
 }
 if(iTextArray)
 {
  delete iTextArray;
  iTextArray=NULL;
 }
 if(iQueryValText)
 {
  delete iQueryValText;
  iQueryValText=NULL;
 }

５、读取相关选择时可使用

  HBufC* buf=iQueryValText->CurrentValueTextLC();

６、如果只需要动态生成控件，而不需要动态生成里边显示的数组时，可把数组在资源文件中定义，在PreLayoutDynInitL()中加下边一段代码即可

 HBufC* buftemp=StringLoader::LoadLC(QTN_NAVI_LABEL_CONTACTGROUPVIEW); 
 CCoeControl* popupControl = CreateLineByTypeL(*buftemp, ActivePageId(), iNewItemId, EAknCtPopupFieldText, NULL );
 CAknPopupFieldText* popupQuestion = static_cast<CAknPopupFieldText*>(popupControl);
 TResourceReader reader;

 CEikonEnv::Static()->CreateResourceReaderLC(reader, R_POPUP_DYNAMIC_QUESTION);
 popupQuestion->ConstructFromResourceL(reader);
 CleanupStack::PopAndDestroy(2); //reader
 Line(iNewItemId)->SetTakesEnterKey(ETrue);
 Line(iNewItemId)->SetOfferHotKeys(ETrue);