如何在qml中關閉表單？

Question

我想在用戶點擊應用程序圖標時顯示一個啓動頁面。爲此，我創建了工作表並將其附加到頁面上。 main.qml

import bb.cascades 1.0 

Page { 
    Container { 
     Label { 
      text: "Home page" 
      verticalAlignment: VerticalAlignment.Center 
      horizontalAlignment: HorizontalAlignment.Center 
     } 
    } 
    attachedObjects: [ 
     Sheet { 
      id: mySheet 
      content: Page { 
       Label { 
        text: "Splash Page/Sheet." 
       } 
      } 
     } 
    ]//end of attached objects 
    onCreationCompleted: { 

     //open the sheet 
     mySheet.open(); 

     //After that doing some task here. 
     --------- 
     --------- 
     --------- 

     //Now I'm closing the Sheet. But the Sheet was not closed. 
     //It is showing the Sheet/Splash Page only, not the Home Page 
     mySheet.close(); 
    } 
}//end of page 

工作完成後，我想關閉表。所以我調用了close（）方法。但是Sheet沒有關閉。

如何關閉oncreationCompleted（）方法或任何C++方法中的工作表？

Answer 1

您正試圖在打開完成之前關閉Sheet（動畫仍在運行），因此關閉請求會被忽略。您必須監視動畫的結尾（opened()信號）以瞭解您的Sheet是否已打開。我會這樣做：

import bb.cascades 1.0 

Page { 
    Container { 
     Label { 
      text: "Home page" 
      verticalAlignment: VerticalAlignment.Center 
      horizontalAlignment: HorizontalAlignment.Center 
     } 
    } 
    attachedObjects: [ 
     Sheet { 
      id: mySheet 
      property finished bool: false 
      content: Page { 
       Label { 
        text: "Splash Page/Sheet." 
       } 
      } 
      // We request a close if the task is finished once the opening is complete 
      onOpened: { 
       if (finished) { 
        close(); 
       } 
      } 
     } 
    ]//end of attached objects 
    onCreationCompleted: { 

     //open the sheet 
     mySheet.open(); 

     //After that doing some task here. 
     --------- 
     --------- 
     --------- 

     //Now I'm closing the Sheet. But the Sheet was not closed. 
     //It is showing the Sheet/Splash Page only, not the Home Page 
     mySheet.finished = true; 
     // If the Sheet is opened, we close it 
     if (mySheet.opened) { 
      mySheet.close(); 
     } 
    } 
}//end of page