如何在ios中单击时更改tableView Cell按钮图像

Question

可能的重复：

how to change tableView Cell button on click in iphone

我在表格视图单元格中有按钮，并使用此功能设置了背景图像。

- (UITableViewCell *)tableView:(UITableView *)tableView
         cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:
                             SectionsTableIdentifier];

    cell.textLabel.text = self.names[self.keys];
    if (cell.accessoryView == nil) {
        UIImage *buttonUpImage = [UIImage imageNamed:@"button_up.png"];
        UIImage *buttonDownImage = [UIImage imageNamed:@"button_down.png"];
        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        [button setBackgroundImage:buttonUpImage
                          forState:UIControlStateNormal];
        [button setBackgroundImage:buttonDownImage
                          forState:UIControlStateHighlighted];
        [button setTitle:@"Send" forState:UIControlStateNormal];
        [button sizeToFit];
        [button addTarget:self
                   action:@selector(tappedButton:)
         forControlEvents:UIControlEventTouchUpInside];
        cell.accessoryView = button;

    }



    return cell;
}

点击按钮的代码是：

- (void)tappedButton:(UIButton *)sender
{
    NSInteger row = sender.tag;
   // NSString *character = self.names[self.keys];
  /*  NSString *key = self.keys[indexPath.row];
    NSArray *nameSection = self.names[key];

    NSString *character = nameSection[indexPath];
   */


   UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle:@"Request Notification."
                          message:[NSString
                                   stringWithFormat:@"Friend Request Sent ."]
                          delegate:nil
                          cancelButtonTitle:@"OK"
                          otherButtonTitles:nil];
    [alert show];

  /*  UIImage *buttonUpImage = [UIImage imageNamed:@"button.png"];
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
     [cell.theSyncButton setImage:buttonUpImage forState:UIControlStateSelected];
    [button setBackgroundImage:buttonUpImage
                      forState:UIControlStateNormal];

    [button setTitle:@"Sent" forState:UIControlStateNormal];
     [button sizeToFit];
   */
}

现在我需要在用户单击表格视图单元格中的“发送”按钮时将背景颜色和标题动态更改为“发送”。我怎样才能获得此功能？

Answer 1

试试这个，

- (UITableViewCell *)tableView:(UITableView *)tableView
         cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    ....
    UIButton *button;
    if (cell.accessoryView == nil) {
        ...
        button = [UIButton buttonWithType:UIButtonTypeCustom];
        ....
        cell.accessoryView = button;
    }
    button.tag = indexPath.row;

    ...
}

在tappedButton:

- (void)tappedButton:(UIButton *)sender
{
     NSInteger row = sender.tag;
    UIImage *buttonUpImage = [UIImage imageNamed:@"button.png"];
    [sender setBackgroundImage:buttonUpImage
                      forState:UIControlStateNormal];

    [sender setTitle:@"Sent" forState:UIControlStateNormal];
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:0];
    [self.tableView beginUpdates];
    [self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath, nil] withRowAnimation:UITableViewRowAnimationFade];
    [self.tableView endUpdates];

}

Answer 2

嗨，你可以做以下，

- (void)tappedButton:(UIButton *)sender
{
    [sender setBackgroundColor:[UIColor grayColor]];
    [sender setTitle:@"Sent" forState:UIControlStateNormal]; 

    UIAlertView *alert = [[UIAlertView alloc]
                      initWithTitle:@"Request Notification."
                      message:[NSString
                               stringWithFormat:@"Friend Request Sent ."]
                      delegate:nil
                      cancelButtonTitle:@"OK"
                      otherButtonTitles:nil];
     [alert show]; 
 }

Answer 3

在您的 IBAction 方法 tappedButton 中，您获得了用户点击的按钮（“sender”参数）。

更改“发件人”的背景颜色和标题

Answer 4

 [sender setBackgroundColor:[UIColor whiteColor]];
((UIButton *)sender).titleLabel.text = @"title";

Answer 5

使用按钮的选中状态，在

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    [button setTitle:@"Send" forState:UIControlStateNormal];
    [button setBackgroundImage:original_image forState:UIControlStateNormal];
    [button setTitle:@"Sent" forState:UIControlStateSelected];
    [button setBackgroundImage:selected_image forState:UIControlStateSelected];
}

在tappedButton() 函数中，使用[sender setSelected:YES] 将发送者设置为选中

这种方法的主要原因是您可以使用isSelected 方法检测按钮的状态。