我想首先創建數據文件夾中的臨時quizz.db
,然後創建它裏面的表,然後創建的資產文件夾中的文件quizz.db它複製到文件夾資產。通過調試代碼,它顯示該文件夾已創建。但我無法在資產文件夾中找到它。下面是代碼,無法建立資產文件夾中的.db文件
#include <bb/cascades/Application>
#include <bb/cascades/QmlDocument>
#include <bb/cascades/AbstractPane>
#include <bb/data/SqlDataAccess>
using namespace bb::cascades;
using namespace bb::data;
SQLTest::SQLTest(bb::cascades::Application *app): QObject(app)
{
const QString fileName = QString("quizz.db");
QString dataFolder = QDir::homePath();
QString newFileName = dataFolder + "/" + fileName;
QTemporaryFile file(newFileName);
// Open the file that was created
if (file.open())
{
// Create an SqlDataAccess object
SqlDataAccess sda(newFileName);
// Create a table called Employee in the database file
sda.execute("CREATE TABLE Employee(firstName VARCHAR(50),lastName VARCHAR(50), salary INT);");
// Insert employee records into the table
sda.execute("INSERT INTO Employee (firstName, lastName, salary) VALUES (\"Mike\", \"Chepesky\", 42000);");
sda.execute("INSERT INTO Employee (firstName, lastName, salary) VALUES (\"Westlee\", \"Barichak\", 55000);");
sda.execute("INSERT INTO Employee (firstName, lastName, salary) VALUES (\"Ian\", \"Dundas\", 47000);");
if(sda.hasError())
{
}
else
copyFileToAssetsFolder("quizz.db");
}
}
void SQLTest::copyFileToAssetsFolder(const QString fileName)
{
QString appFolder(QDir::homePath());
appFolder.chop(4);
QString originalFileName = appFolder + "app/native/assets/" + fileName;
QFile newFile(originalFileName);
// If I enable this `if` condition the code satisfies it and removes the quizz.db file and then it satisfies the next `if` condition and successfully copies the quizz.db file from `data` folder to `assets` folder.
/*if(newFile.exists())
QDir().remove(originalFileName);*/
// this `if` condition is not satisfied. Which should mean the quizz.db file has been created on assets folder.
if (!newFile.exists())
{
// If the file is not already in the assets folder, we copy it from the
// data folder (read and write) to the assets folder (read only).
QString dataFolder = QDir::homePath();
QString newFileName = dataFolder + "/" + fileName;
QFile originalFile(newFileName);
if (originalFile.exists())
{
// Create sub folders if any creates the SQL folder for a file path like e.g. sql/quotesdb
QFileInfo fileInfo(originalFileName);
QDir().mkpath (fileInfo.dir().path());
if(!originalFile.copy(originalFileName)) {
qDebug() << "Failed to copy file to path: " << originalFileName;
}
} else {
qDebug() << "Failed to copy file data base file does not exists.";
}
}
// mSourceInDataFolder = newFileName;
}
如果我能copyFileToAssetsFolder
功能評論if
條件它刪除已經創建的資產文件夾(IM無法找到它)quizz.db文件,並進入下一if
條件和副本里面在data
文件夾中創建quizz.db以資產fodler。但無論如何,我無法在資產文件夾中找到quizz.db。我很快需要幫助。謝謝。
.BAR的文件通常包含文件夾「資產」,我希望它從應用程序的家目錄鏈接到存檔,因爲你不能修改。 BAR(這意味着,您可以更改已簽名的應用程序...),您將無法更改資產目錄或其內容。那麼,你自己找到了你的解決方案,我只是想解釋這個問題的可能原因。 – Schlangi 2013-04-27 14:35:27