如何通过用于Firefox的SQLite插件向数据库添加另一行？

问题描述

| 我只是在Iphone应用程序中从sqlite开始，我使用Firefox的sqlite附加组件创建了数据库，并很好地运行了该应用程序。但是现在我试图向其添加另一行并查看其工作，但是由于某种原因，我能够添加另一行但在我的应用程序中看不到它。 这是我用来遍历行的代码。

-(void) readAnimalsFromDatabase {
    // Setup the database object
    sqlite3 *database;

    // Init the animals Array
    animals = [[NSMutableArray alloc] init];

    // Open the database from the users filessytem
    if(sqlite3_open([databasePath UTF8String],&database) == sqlITE_OK) {
        // Setup the sql Statement and compile it for faster access
        const char *sqlStatement = \"select * from animals\";
        sqlite3_stmt *compiledStatement;
        if(sqlite3_prepare_v2(database,sqlStatement,-1,&compiledStatement,NULL) == sqlITE_OK) {
            // Loop through the results and add them to the Feeds array
            while(sqlite3_step(compiledStatement) == sqlITE_ROW) {
                // Read the data from the result row
                Nsstring *aName = [Nsstring stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement,1)];
                Nsstring *aDescription = [Nsstring stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement,2)];
                Nsstring *aimageUrl = [Nsstring stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement,3)];

                // Create a new animal object with the data from the database
                Animal *animal = [[Animal alloc] initWithName:aName description:aDescription url:aimageUrl];

                // Add the animal object to the animals Array
                [animals addobject:animal];

                [animal release];
            }
        }
        // Release the compiled statement from memory
        sqlite3_finalize(compiledStatement);

    }
    sqlite3_close(database);

}

-(void) checkAndCreateDatabase{
    // Check if the sql database has already been saved to the users phone,if not then copy it over
    BOOL success;

    // Create a FileManager object,we will use this to check the status
    // of the database and to copy it over if required
    NSFileManager *fileManager = [NSFileManager defaultManager];

    // Check if the database has already been created in the users filesystem
    success = [fileManager fileExistsAtPath:databasePath];

    // If the database already exists then return without doing anything
    if(success) return;

    // If not then proceed to copy the database from the application to the users filesystem

    // Get the path to the database in the application package
    Nsstring *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:databaseName];

    // copy the database from the package to the users filesystem
    [fileManager copyItemAtPath:databasePathFromApp toPath:databasePath error:nil];

    [fileManager release];
}

请帮我解决一下这个。 谢谢，     

解决方法

        实际上，无论何时使用sqlite，数据库都会保存在文件夹user / library / application support / iphone Simulator / app文件夹中。您需要去那里并删除数据库，然后再次运行该应用程序。