用户在iPhone上按下按钮时更改UIButton上的图像 [英] Changing image on UIButton when user presses that button on an iPhone

问题描述

当用户按下该按钮时，我想更改UIButton上的图像.所以，我写了

I want to change the image on UIButton, when User presses that button. So, I wrote

btnthumbnail2 setImage:[UIImage imageNamed:@"leaderboard_ov.png"] forState:UIControlStateNormal];

然后我改变了看法.

图像正在更改，但不显示更改后的图像.我认为控件会转到下一个视图，这就是发生这种情况的原因.但是我想显示更改，我该怎么做?请为此帮我..

The image is changing but not display the changed image.I think the controll goes to next view tha's why it is happening. But I want to show the change, How can I do this?? Plz help me for this..

推荐答案

我正在使用Interface Builder，在其中向视图添加了UIButton.

I am using Interface Builder, in which I added a UIButton to the view.

1. 默认情况下，我定义了 selected 按钮，并为 selected 状态选择了我的图片(使用检查器"窗口中的下拉列表选择"选择图像之前，请先选择选定状态配置".

1. I defined the button selected by default and selected my image for the selected state (Use drop-down list in Inspector window to choose "Selected State Configuration" before selecting the image).

在控制器中创建一个IBAction并将按钮连接到该动作.

Create an IBAction in the controller and connect the button to that action.

然后看到下面的代码:

  -(IBAction) toggleUIButtonImage:(id)sender{
      if ([sender isSelected]) {
         [sender setImage:unselectedImage forState:UIControlStateNormal];
         [sender setSelected:NO];
      } else {
         [sender setImage:selectedImage forState:UIControlStateSelected];
         [sender setSelected:YES];
      }
  } 

我认为这是一个非常平稳的解决方案.希望对您有帮助！

I think this is quite a smooth solution. Hope it helps!

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