然後新增一個實現連線mysql資料庫及對資料庫進行相關操作的方法的類。其實現連線mysql資料庫及對資料庫進行相關操作的方法的實現如下：

//連線資料庫

-(void)connectHost:(NSString *)host connectUser:(NSString *)user connectPassword:(NSString *)password connectName:(NSString *)name
{
    
    myconnect = mysql_init(nil);
  //新增。設定編碼（解決中文亂碼問題）
   mysql_options(myconnect, MYSQL_SET_CHARSET_NAME, "gb2312");
    myconnect = mysql_real_connect(myconnect,[host UTF8String],[user UTF8String],[password UTF8String],[name UTF8String],MYSQL_PORT,NULL,0);
    
    if(!myconnect)
    {
        printf("error code=%i",mysql_errno(myconnect));
        return;
    }
    
    NSLog(@"connected to Mysql");
}

 

//查詢資料庫中資料，引數sql既為SQL查詢語句（@"select name from table1"），返回SQL語句查詢到的結果，我理解的是recordArr中存放的是每組資料（每個column）中查詢到的結果，而recordsArray中存放的是recordArr,即有幾個column就有幾個recorder。
-(NSMutableArray*)query:(NSString *)sql
{
    if(!myconnect)
    {
        NSLog(@"Please connect first");
        return nil;
    }
    NSMutableArray *recordsArray = [[[NSMutableArray alloc] init] autorelease];
    
    mysql_query(myconnect, [sql UTF8String]);
    MYSQL_RES* result = mysql_store_result(myconnect);
    int num_rows = mysql_num_rows(result);
    int num_fields = mysql_num_fields(result);
    
    for(int i=0;i<num_rows;i++)
    {
        MYSQL_ROW row = mysql_fetch_row(result);
        NSMutableArray *recordArr = [[NSMutableArray alloc] init];
        
        for(int j=0;j<num_fields;j++)
        { 
           //最新修改，解決中文亂碼問題
           //中文簡體編碼：CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingDOSChineseSimplif)
            //NSString* value= [NSString stringWithUTF8String:row[j]];
            NSString* value= [NSString stringWithCString:row[j] encoding:CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingDOSChineseSimplif)];
            [recordArr addObject:value];
        }
        
        [recordsArray addObject:recordArr];
        [recordArr release];
    }
    return recordsArray;
}
 

//斷開資料庫連線

- (void)disconnect
{
    mysql_close(myconnect);
    NSLog(@"Close From Mysql");
}

//修改資料庫中的資料（無返回值）。刪除、增加資料都可以呼叫此方法。

-(void)update:(NSString *)sql
{
    if(myconnect)
    {
        mysql_query(myconnect, [sql UTF8String]);
    }
    else
    {
        NSLog(@"Please connect to DB first");
        return;
    }
}
 

//連線按鈕處理方法

-(void)btnConnectTapped:(id)sender
{
    NSLog(@"%@",ipText.text);
    NSLog(@"%@",duankouTextField.text);
    NSLog(@"%@",nameTextField.text);
    NSLog(@"%@",passwordTextField.text);
    mysqlManager = [[MysqlManager alloc]init];
    [mysqlManager connectHost:[NSString stringWithFormat:@"%@",ipText.text] connectUser:nameTextField.text connectPassword:passwordTextField.text connectName:@"wgjchm"];
}

//查詢按鈕處理方法

-(IBAction)queryButtonTapped:(id)sender
{
    //插入資料

    [mysqlManager update:@"insert into fdgg values(5,'hc',1,80,0)"];

    //查詢資料
    NSMutableArray *res = [mysqlManager query:@"select name from fdgg"];
    
    NSLog(@"%d",res.count);
    for(int i = 0; i < [res count]; ++i)
    {
        NSMutableArray *record = [res objectAtIndex:i];
        for(int j = 0; j < [record count]; ++j)
        {
            //value既為查詢到的name值

            NSString *value = [record objectAtIndex:j];
            NSLog(@"value=%@",value);
        }
    }

    //斷開連線
    [mysqlManager disconnect];
}