Question

当我在应用程序上单击“保存”按钮时，出现所有错误，但一切正常，但是当我尝试保存时，数据库抛出的错误被锁定。.

我检查数据库表仍然存在，但是错误不断出现，我尝试了很多方法来解决此错误，但是找不到解决方案我还完成了sqlite_finalize（querystatement）和sqlite_close（db）。

func singlesave(queryString:String)
{
    db = openDatabase()
    var queryStatement: OpaquePointer? = nil

    if sqlite3_prepare_v2(db, queryString, -1, &queryStatement, nil) == SQLITE_OK{

        if sqlite3_exec(db, queryString, nil, nil, nil) == SQLITE_OK {
            print("save successfuly")}

        else{
            let errmsg = String(cString: sqlite3_errmsg(db)!)
            print("failed to save in single table: \(errmsg)")
        }
    }
    sqlite3_finalize(queryStatement)
    sqlite3_close(db)
}

func loadsingle()->single
{
    db = openDatabase()
    var data = single()
    let queryStatementString = "SELECT * from single"
    var queryStatement: OpaquePointer? = nil
    // 1
    if sqlite3_prepare(db, queryStatementString, -1, &queryStatement, nil) == SQLITE_OK {
        while  sqlite3_step(queryStatement) == SQLITE_ROW
        {
            let queryResultCol1 = sqlite3_column_int(queryStatement, 0)//id
            let queryResultCol2 = sqlite3_column_text(queryStatement, 1)//name
            let queryResultCol3 = sqlite3_column_text(queryStatement, 2)//arabic
            let queryResultCol4 = sqlite3_column_text(queryStatement, 3)//urdu
            let queryResultCol5 = sqlite3_column_text(queryStatement, 4)//english
            let queryResultCol6 = sqlite3_column_text(queryStatement, 5)//Discription
            let queryResultCol7 = sqlite3_column_int(queryStatement, 6)//count
            let queryResultCol8 = sqlite3_column_int(queryStatement, 7)//surahid
            let queryResultCol9 = sqlite3_column_int(queryStatement, 8)//ayatid

            data.Name = String(cString :queryResultCol2!)
            data.Arabic = String(cString :queryResultCol3!)
            data.Urdu = String(cString :queryResultCol4!)
            data.English = String(cString :queryResultCol5!)
            data.Discription = String(cString :queryResultCol6!)
            data.count = Int(queryResultCol7)
            data.surahid = Int(queryResultCol8)
            data.ayatid = Int(queryResultCol9)
        }
    }
    else
    {print("error")}
    sqlite3_finalize(queryStatement)
    sqlite3_close(db)
    return data
}

函数IUDQuery（queryString：String） { db = openDatabase（）

    var queryStatement: OpaquePointer? = nil

    if  sqlite3_prepare_v2(db, queryString, -1, &queryStatement, nil) == SQLITE_OK {

        if sqlite3_exec(db,queryString,nil,nil,nil) == SQLITE_OK
        {
            print("saved")
        }
        else
        {
            let errmsg = String(cString: sqlite3_errmsg(db)!)
            print("IUDQuery: \(errmsg)")
        }
    }

    sqlite3_finalize(queryStatement)
}

sqlite dbbrowser错误数据库已锁定

0 个答案: