单击时更改单元格上按钮的图像

Question

在我的单元格中，我有3个按钮，当用户单击每个按钮时，将触发以下3种方法。

- (void) but1:(id) sender{
    NSLog(@"Touched 1 %ld",(long)[(UIButton *)sender tag]);

}

- (void) but2:(id) sender{
    NSLog(@"Touched 2 %ld",(long)[(UIButton *)sender tag]);

}

- (void) but3:(id) sender{
    NSLog(@"Touched 3 %ld",(long)[(UIButton *)sender tag]);

}

想象一下，用户单击按钮1，然后应触发but1方法，并且按钮1的背景图像也应更改。 如何在上述方法中进行此更改。

注意：我正在使用XIB文件。

我能够访问包含该单元格的NIB文件。

UINib *cellNib = [UINib nibWithNibName:@"MyCell" bundle:nil];
        [self.contextMenuTableView registerNib:cellNib forCellReuseIdentifier:@"cell"];

现在如何访问他触摸的按钮并更改图像？

更新

这是一个表格视图。 在每个单元格中有3个按钮，我应该能够选择和取消选择表格中的这些按钮之一。

例如，如果只能选择单元格中的1个按钮 。 当选择单元格时，我将显示图像。 如果不是，我将显示默认图像。

Answer 1

您可以将发件人的图像更改为

- (void) but1:(id) sender{
    NSLog(@"Touched 1 %ld",(long)[(UIButton *)sender tag]);
    [((UIButton *)sender) setImage:[UIImage imageNamed:"image.png"] forState:UIControlStateNormal]
}

祝好运

Answer 2

尝试类似

          UIImage *btnImage = [UIImage imageNamed:@"image.png"];
          [btnTwo setImage:btnImage forState:UIControlStateNormal];

Answer 3

要知道按下了哪个按钮，可以为每个按钮设置标签。 从该标签中，您将获得粘贴了哪个按钮的信息

在界面部分..

整数计数

在viewDidLoad中

计数= 0;

- (IBAction)ButtonClicked:(id)sender {



    NSLog(@"Touched 1 %ld",(long)[(UIButton *)sender tag]);
    if(count%2==0)
    {
        [((UIButton *)sender) setBackgroundImage:[UIImage imageNamed:@"imageA.png"] forState:UIControlStateNormal];
    }
    else
   {
      [((UIButton *)sender) setBackgroundImage:[UIImage imageNamed:@"imageB.png"] forState:UIControlStateNormal];
   }


    [(UIButton *)sender setTitle:@"" forState:UIControlStateNormal];
    count=count+1;

}

Answer 4

- (void) but1:(id) sender{

  [but1 setBackgroundImage:[UIImage imageNamed:@"blue_button.png"]
                            forState:UIControlStateNormal];
  NSLog(@"Touched 1 %ld",(long)[(UIButton *)sender tag]);

 }

试试这个代码，这可能对您有帮助

Answer 5

也许可以这样存档

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    UIButton *btn1 = (UIButton *) [cell viewWithTag:1] ;
    UIButton *btn2 = (UIButton *) [cell viewWithTag:2];
    UIButton *btn3 = (UIButton *) [cell viewWithTag:3];
    [btn1 setTag:((indexPath.row*10)+1)];
    [btn1  setTag:((indexPath.row*10)+2)];
    [btn3 setTag:((indexPath.row*10)+3)];
    [btn1 addTarget:self action:@selector(but1:) forControlEvents:UIControlEventTouchDown];
    [btn2 addTarget:self action:@selector(but2:) forControlEvents:UIControlEventTouchDown];
    [btn3 addTarget:self action:@selector(but3:) forControlEvents:UIControlEventTouchDown];
    return cell;
}

- (void) but1:(UIButton *) sender{
    NSLog(@"Touched 1 %ld",((long)[(UIButton *)sender tag])%10);
    [sender setBackgroundImage:[UIImage imageNamed:@"newImage.png"] forState:UIControlStateNormal];
    NSInteger row = ((long)[sender tag])/10;
    NSIndexPath *indexPathOfYourCell = [NSIndexPath indexPathForRow:row inSection:0];
    [self.tableview beginUpdates];
    [self.tableview reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPathOfYourCell] withRowAnimation:UITableViewRowAnimationNone];
    [self.tableview endUpdates];
}

- (void) but2:(UIButton *) sender{
    NSLog(@"Touched 2 %ld",((long)[(UIButton *)sender tag])%10);
    [sender setBackgroundImage:[UIImage imageNamed:@"newImage.png"] forState:UIControlStateNormal];
    NSInteger row = ((long)[sender tag])/10;
    NSIndexPath *indexPathOfYourCell = [NSIndexPath indexPathForRow:row inSection:0];
    [self.tableview beginUpdates];
    [self.tableview reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPathOfYourCell] withRowAnimation:UITableViewRowAnimationNone];
    [self.tableview endUpdates];
}

- (void) but3:(UIButton *) sender{
    NSLog(@"Touched 3 %ld",((long)[(UIButton *)sender tag])%10);
    [sender setBackgroundImage:[UIImage imageNamed:@"newImage.png"] forState:UIControlStateNormal];
    NSInteger row = ((long)[sender tag])/10;
    NSIndexPath *indexPathOfYourCell = [NSIndexPath indexPathForRow:row inSection:0];
    [self.tableview beginUpdates];
    [self.tableview reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPathOfYourCell] withRowAnimation:UITableViewRowAnimationNone];
    [self.tableview endUpdates];
}

享受编码！

Answer 6

你也可以用这个

button1.tag = 0;
button2.tag = 1;
button3.tag = 2;
[button1 setImage:[UIImage imageNamed:@"image.png"] forState:UIControlStateNormal];
[button1 setImage:[UIImage imageNamed:@"selected_image.png"] forState:UIControlStateSelected];
[button2 setImage:[UIImage imageNamed:@"image.png"] forState:UIControlStateNormal];
[button2 setImage:[UIImage imageNamed:@"selected_image.png"] forState:UIControlStateSelected];
[button3 setImage:[UIImage imageNamed:@"image.png"] forState:UIControlStateNormal];
[button3 setImage:[UIImage imageNamed:@"selected_image.png"] forState:UIControlStateSelected];

向所有按钮添加一个公共选择器（ buttonClicked:并实现选择器，如下所示

- (void)buttonClicked:(id)sender
{
    [button1 setSelected:NO];
    [button2 setSelected:NO];
    [button3 setSelected:NO];

    if ([sender isKindOfClass:[UIButton class]]) 
        [sender setSelected:YES];
}