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我有 UIWebView 用于显示 HTML 文章。当用户触摸 UIWebView 中的某个区域时，将显示 UIMenuController。然后用户选择它显示 UITextView 的注释按钮，然后用户可以编写一些文本，之后用户可以将文本存储到该触摸区域，如 Readdle 应用程序的 Documents。我创建了最多写入文本并保存到数据库。保存文本后，我需要在触摸区域显示按钮。如何启用按钮？

UIWEBView 显示文章页面：

在此处输入图像描述

长按UIMenuController后会显示，然后选择notes

在此处输入图像描述

选择笔记后会出现 UITextView 用于写一些笔记，然后单击完成按钮 UItextView 将删除，然后 UIWebView 将出现。在此处输入图像描述

我需要在 uiwebview 长按位置显示小按钮或图标。在 UIWebView 上方的位置是Commences. 在即将开始的文本中，我需要在单击完成按钮后显示小图标

- (void)viewDidLoad
{
    [wbCont loadHTMLString:webString baseURL:nil];
    wbCont.userInteractionEnabled=YES;
    [self.view addSubview:wbCont];

    menuItem = [[UIMenuItem alloc] initWithTitle:@"Notes" action:@selector(note:)];
    [items addObject:menuItem];

}

长按后 UIMenuItem 将打开并单击注释然后打开 UItextView

- (void)note:(id)sender{

    NSLog(@"Note");

    self.navigationController.navigationBarHidden=YES;

    txtview = [[UITextView alloc]initWithFrame:CGRectMake(0,0,320,568)];

    txtview.font = [UIFont fontWithName:@"Helvetica" size:12];
    txtview.font = [UIFont boldSystemFontOfSize:12];
    txtview.backgroundColor = [UIColor whiteColor];
    txtview.scrollEnabled = YES;
    txtview.pagingEnabled = YES;
    txtview.editable = YES;

    [self.view addSubview:txtview];

    button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [button addTarget:self
               action:@selector(click:)
    forControlEvents:UIControlEventTouchDown];
    [button setTitle:@"Done" forState:UIControlStateNormal];
    button.frame = CGRectMake(240.0, 20.0, 60.0, 40.0);
    [txtview addSubview:button];

}

然后单击完成按钮我保存文本：

-(void)click:(id)sender{

    NSLog(@"done");

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];

    // NSString *documentsDirectory = [paths objectAtIndex:1];

    NSString *path = [documentsDirectory stringByAppendingPathComponent:@"ohs.sqlite"];
    NSLog(@"filepath %@",path);


    if (sqlite3_open([path UTF8String], &database) == SQLITE_OK) {

        const char *sql = [[NSString stringWithFormat:@"SELECT textnotes FROM textnote where textnote = '%@'",txtview.text] cStringUsingEncoding:NSUTF8StringEncoding];

        NSLog(@"sql is %s",sql);

        BOOL favExist = false;

        sqlite3_stmt *statement, *addStmt;

        if (sqlite3_prepare_v2(database, sql, -1, &statement, NULL) == SQLITE_OK) {
            // We "step" through the results - once for each row.
            while (sqlite3_step(statement) == SQLITE_ROW) {

            favExist = true;
            }
        }

        if(!favExist){

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

            NSLog(@"sql insert is %s",sqlInsert);

            // [catID release];

            if(sqlite3_prepare_v2(database, sqlInsert, -1, &addStmt, NULL) != SQLITE_OK)
                NSAssert1(0, @"Error while creating add statement. '%s'", sqlite3_errmsg(database));

            if(SQLITE_DONE != sqlite3_step(addStmt))
                NSAssert1(0, @"Error while inserting data. '%s'", sqlite3_errmsg(database));


       }else {

        }

    }

    [txtview removeFromSuperview];
    [button removeFromSuperview];

  }

保存文本后，我删除了文本视图，按钮。然后 UIWebView 将显示。UIwebView tocuh 位置如何显示通过 readdle 应用程序保存文本（如 Documents）的按钮。

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