ios - 点击后设置永久按钮图像

Question

我以编程方式创建了一个带有 normalState 图像的按钮。但是我想在按下按钮时设置一个新的按钮图像（新图像应该在其余时间显示）。我尝试了一些东西，但它只在敲击时有效。因此，再次点击后按钮会显示其旧图像。

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setBackgroundImage:[UIImage imageNamed:@"image1.png"] forState:UIControlStateNormal];
[button setBackgroundImage:[UIImage imageNamed:@"image2.png"] forState:UIControlStateHighlighted];
button.frame = CGRectMake(15.0f, 32.0f, 24.0f, 20.0f);
[cell addSubview:button];

谢谢你的帮助。

Answer 1

尝试使用它会对您有所帮助。

  UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        [button setBackgroundImage:[UIImage imageNamed:@"image1.png"] forState:UIControlStateNormal];
    [button setBackgroundImage:[UIImage imageNamed:@"image2png"] forState:UIControlStateHighlighted];
    button.frame = CGRectMake(15.0f, 32.0f, 24.0f, 20.0f);

    // ----------- Add this line in your code -------
    [button addTarget:self action:@selector(btnPressed:) forControlEvents:UIControlEventTouchUpInside];
    [cell addSubview:button];


    - (void)btnPressed:(UIButton *)sender
    {
          [sender setBackgroundImage:[UIImage imageNamed:@"image2.png"] forState:UIControlStateNormal];
    }

Answer 2

您必须在按钮的目标中进行设置。添加以下代码：

[button addTarget:self action:@selector(buttonTapped:) forControlEvents:UIControlEventTouchUpInside];

并在该方法中设置图像UIControlStateNormal：

- (void)buttonTapped:(UIButton *)sender {
    [button setBackgroundImage:[UIImage imageNamed:@"image2png"] forState:UIControlStateNormal];
}