ios - 如何创建一个 UIButton 来允许我执行 2 个 IBAction iOS - Objective-C

Question

如何创建一个 UIButton 来允许我执行 2 个 IBAction。例如，用户按下“关注”后，按钮将变为“取消关注”，反之亦然。最好使用 2 个按钮还是 1 个按钮并使用不同的状态来完成。我研究过如何用一个按钮完成此任务，但尚未找到任何解决方案。谢谢!

Answer 1

您可以使用一个按钮实现这一点。您需要将按钮的标题设置为每个按钮的 states并在发生选择或取消选择时切换 IBAction 方法中的状态:

[yourButton setTitle:@"Follow" forState:UIControlStateNormal];
[yourButton setTitle:@"Unfollow" forState:UIControlStateSelected];

并像这样实现 IBAction 方法:

- (IBAction)btnClicked:(UIButton *)sender
{
   sender.selected = !sender.selected;
   if (sender.selected)
   {
      // Currently selected the button and it's title is changed to unfollow
      // Do your selection action here
   }
   else
   {
      // Currently de-selected the button and it's title is changed to follow
      // Do your selection action here
   }
}