UIButton 标记提取上次更新值

Question

我需要在UIWebView中创建多个按钮。所以，我使用了按钮的标签。我用 INTEGER 将按钮标签保存到数据库中。但这并没有节省适当的价值。每个按钮标记在数据库中都有文本。稍后我需要检索。但是在将最后一个值存储到数据库并单击任何其他按钮后，它只获取上次更新的值。为什么会这样？

桌子：

textnotes          text_id   button_id
  hi                1         1
  how are you       1         3
im fine             2         7
  This is test       2         11

UIButton：

int gTag = 1;
webviewbutton.tag = gTag;
 gTag++;
[wbCont.scrollView  addSubview:webviewbutton];

插入：

const char *sqlInsert = [[NSString stringWithFormat:@"insert into textnote (textnotes,text_id,button_id ) values ('%@','%@','%ld')", txtview.text,artID,(long)webviewbutton.tag] cStringUsingEncoding:NSUTF8StringEncoding];

从数据库中检索带有文本的按钮标签：

    textArray=[[NSMutableArray alloc]init];
        webbutton_art=[[NSMutableArray alloc]init];
        webbutton_button=[[NSMutableArray alloc]init];
    if (sqlite3_open([path UTF8String], &database) == SQLITE_OK) {
    const char *sql =  [[NSString stringWithFormat:
                                     @"SELECT textnotes,text_id,button_id FROM textnote where button_id = '%ld' AND text_id = '%@' ",(long)webviewbutton.tag,artID]cStringUsingEncoding:NSUTF8StringEncoding];

                NSLog(@"sql is %s",sql);
                sqlite3_stmt *statement;
                if (sqlite3_prepare_v2(database, sql, -1, &statement, NULL) == SQLITE_OK) {
                    while (sqlite3_step(statement) == SQLITE_ROW) {
                        txtstring = [[NSString alloc] initWithUTF8String:
                                     (const char *) sqlite3_column_text(statement, 0)];

                        webbutton_textartid = sqlite3_column_int(statement, 1);
                        webbutton_buttontag= sqlite3_column_int(statement, 2);
          [textArray addObject:txtstring];
         [webbutton_art addObject:@(webbutton_textartid)];
                        [webbutton_button addObject:@(webbutton_buttontag)];

    if( webbutton_art  && webbutton_button ){
    for(int i=0;i<[textArray count];i++){

txtview = [[UITextView alloc]initWithFrame:CGRectMake(0,0,320,568)];
        txtview.font = [UIFont fontWithName:@"Helvetica" size:12];

             txtview.text=[textArray objectAtIndex:i];
 [self.view addSubview:txtview];
             }

    }

Answer 1

声明一个整数变量，如下所示：

int offset;

然后像这样做：

for (int i = 0; i<[textArray count]; i++) {

        UITextView *txtview = [[UITextView alloc]initWithFrame:CGRectMake(100,100+offset,320,568)];
        txtview.font = [UIFont fontWithName:@"Helvetica" size:12];

        txtview.text=[textArray objectAtIndex:i];
        [self.view addSubview:txtview];
        offset = offset + 50;
    }