数据库执行查询错误：SQL逻辑错误或缺少数据库xcode

Question

我正在运行本教程中的代码sqlite database iOS app tutorial。查询功能是：

- (IBAction)saveInfo:(id)sender
{
    //  Prepare the query string.
    //  If the recordIDToEdit property has value other than -1, then create an update query. Otherwise create an insert query.
    NSString *query;

    if (self.recordIDToEdit == -1)
    {
        query = [NSString stringWithFormat:@"insert into peopleInfo values(null, '%@', '%@', '%@')", self.txtFirstname.text, self.txtLastname.text, self.txtAge.text ];
    }
    else
    {
        query = [NSString stringWithFormat:@"update peopleInfo set firstname='%@', lastname='%@', age='%@' where peopleInfoID=%d", self.txtFirstname.text, self.txtLastname.text, self.txtAge.text, self.recordIDToEdit];
    }



    NSLog(@"The query is: %@",query);

    //  Execute the query.
    [self.dbManager executeQuery:query];

    //  If the query was succesfully executed then pop the view controller.
    if (self.dbManager.affectedRows != 0) {
        NSLog(@"Query was executed successfully. Affacted rows = %d", self.dbManager.affectedRows);

        //  Inform the delegate that editing was finished.
        [self.delegate editingInfoWasFinished];

        //  Pop the view controller.
        [self.navigationController popViewControllerAnimated:YES];
    }
    else
    {
        NSLog(@"Could not execute the query");
    }
}

程序在插入记录时出现sql错误

The query is: insert into peopleInfo values(null, 'Project 1', 'Test 1', '2014-12-15 05:00:20 +0000')
DB Execute Query Error: SQL logic error or missing database
Could not execute the query.

如何删除此错误？

Answer 1

查看突出显示的文件夹。将其复制到您的项目中。你的代码似乎没问题。并确保db.sql在那里。