自定义单选按钮为iphone一次选择一个？

我动态地创建了一些带有一些值的单选按钮列表。从语法上讲，我改变了按钮状态，改变了选中和未选中的图像。但问题是我可以同时选择所有单选按钮。实际上我需要一次选一个。 当我单击下一个单选按钮时，以前选择的按钮状态应更改为未选择

这是我的代码，我试图改变图像，但是…我的代码有一些问题

   RadioButton = [UIButton buttonWithType:UIButtonTypeCustom];
   [RadioButton setFrame:CGRectMake(0.0f, 0.0f, 20, 20)];
   [RadioButton setCenter:CGPointMake(116.0,p1)];
   [RadioButton setSelected:NO];
   [RadioButton setImage:[UIImage imageNamed:@"uncheck.png"] forState:UIControlStateNormal];
   [RadioButton addTarget:self action:@selector(RadioButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
   [self.scrollView addSubview:RadioButton];




  -(void)RadioButtonTapped:(id)sender
    {


       UIButton *RadioButton1 = (UIButton*)sender ;

      [self radiobuttonAction:RadioButton1];
    }

 -(void)radiobuttonAction:(UIButton *)Button
    {

       if(![Button isSelected])
         {


            [Button setSelected:YES]; 
            [Button setImage:[UIImage imageNamed:@"radio_active.png"] forState:UIControlStateSelected]; //not working, button image is not changing 
        } 
     else
        { 
            [Button setSelected:NO]; 
            [Button setImage:[UIImage imageNamed:@"radio_inactive.png"] forState:UIControlStateNormal];
        }


 }

在哪里可以更改以前选择的按钮的图像

---

提前感谢

创建这样的按钮

for(int i=0;i<4;i++)
{
 RadioButton = [UIButton buttonWithType:UIButtonTypeCustom];
 RadioButton.tag = i*100;
 [RadioButton setFrame:CGRectMake(0.0f, 0.0f, 20, 20)];
 [RadioButton setCenter:CGPointMake(116.0,p1)];
 [RadioButton setSelected:NO];
 [RadioButton setImage:[UIImage imageNamed:@"uncheck.png"] forState:UIControlStateNormal];
 [RadioButton addTarget:self action:@selector(RadioButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
 [self.scrollView addSubview:RadioButton];

}

-(void)radiobuttonAction:(UIButton *)Button
{

   UIButton *Button = (UIButton*)sender;
   for(UIButton * btn in self.scrollview.subViews)
   {
     if(btn.tag == Button.tag)
     {
        if(![Button isSelected])
        {
          [Button setSelected:YES]; 
          [Button setImage:[UIImage imageNamed:@"radio_active.png"] forState:UIControlStateSelected]; //not working, button image is not changing 
        } 
        else
        { 
          [Button setSelected:NO]; 
          [Button setImage:[UIImage imageNamed:@"radio_inactive.png"] forState:UIControlStateNormal];
        }
     }
     else
    {
      //do selected or de-selected code for other buttons

    }

}

---

在创建时标记按钮。

---

点击按钮时，通过标签获取按钮。取消选择所有按钮。更新作为n参数收到的当前按钮。

假设要添加5个单选按钮

 - (void)viewDidLoad
 {
      for (int i = 0; i < 5; i++) {
           UIButton*  RadioButton = [UIButton buttonWithType:UIButtonTypeCustom];
           [RadioButton setFrame:CGRectMake(0.0f, 0.0f, 20, 20)];
           [RadioButton setCenter:CGPointMake(116.0, i * 40)];
           //        [RadioButton setTag:i * 10];
           [RadioButton setSelected:NO];
           [RadioButton setImage:[UIImage imageNamed:@"unCheck.png"] forState:UIControlStateNormal];
           [RadioButton addTarget:self action:@selector(RadioButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
           [self.scrollView addSubview:RadioButton];

     }
  }

//do not forget to declared this in your header file
-(void)RadioButtonTapped:(UIButton*)button;
 {
       for (UIButton *btn in self.scrollView.subviews) {
          [btn setImage:[UIImage imageNamed:@"unCheck.png"] forState:UIControlStateNormal];
         }
       [button setImage:[UIImage imageNamed:@"check.png"] forState:UIControlStateNormal];
 }

-（void）viewDidLoad
{
对于（int i=0；i<5；i++）{
UIButton*RadioButton=[UIButton Button类型：UIButtonTypeCustom]；
[RadioButton设置框：CGRectMake（0.0f，0.0f，20，20）]；
[RadioButton设置中心：CGPointMake（116.0，i*40）]；
//[无线按钮设置标签：i*10]；
[选择的单选按钮设置：否]；
[RadioButton setImage:[UIImage ImageName:@“unCheck.png”]用于状态：UIControlStateNormal]；
[RadioButton添加目标：自操作：@选择器（RadioButton标记：）用于控制事件：UIControlEventTouchUpInside]；
[self.scrollView addSubview:RadioButton]；
}
}
//不要忘记在头文件中声明这一点
-（无效）RadioButton带有：（UIButton*）按钮；
{
用于（self.scrollView.subview中的UIButton*btn）{
[btn setImage:[UIImage ImageName:@“unCheck.png”]用于状态：UIControlStateNormal]；
}
[按钮设置图像：[UIImage ImageName:@“check.png”]用于状态：UIControlStateNormal]；
}

---

上面的代码更新UI，将所有按钮的图像设置为“取消选中”，然后将上次按下的按钮的图像更改为“选中”。

选择一个按钮时，取消选择所有按钮。如果滚动视图中有按钮，则可以使用以下代码：

//Your Method
-(void)RadioButtonTapped:(id)sender
{
  UIButton *RadioButton1 = (UIButton*)sender;
  [self deselectAll];
  [self radiobuttonAction:RadioButton1];      
}

- (void) deselectAll : (UIScrollView *) scrollView{
  NSArray *viewArray = [scrollView subviews];
  for (UIView *v in viewArray){
  if([v isKindOfClass:[UIButton class]]){
        [((UIButton *)v) setSelected:NO];
  }
 }
}

编辑：但是如果你想给它真正的单选按钮效果（其中一个总是被选中，并且只有一个被选中），它对你来说会更容易。使用以下代码：

 //A globle refButton
  UIButton *refButton = nil;
 //Set image for both state:
[RadioButton setImage:[UIImage imageNamed:@"uncheck.png"] forState:UIControlStateNormal];
[RadioButton setImage:[UIImage imageNamed:@"check.png"] forState:UIControlStateSelected];

 //make any of above default select: may be the last one and pass that to `refButton`
 refButton = RadioButton;



 //Your Method
-(void)RadioButtonTapped:(id)sender
{
  [refButton setSelected:NO];
  refButton = (UIButton*)sender;
  [refButton setSelected:YES];      
}

---

在按钮上设置插座如何？例如，您有3个按钮，设置3个插座，这样可以很容易解决您的问题。但是我动态创建了按钮，

RadioButtonTapped

——在这里，您是否在每个按钮中都使用此按钮？是的，当我们按下任何单选按钮时，将调用点击操作。请描述一下为什么将标签更改为RadioButton.tag=i*100，结果应该是什么？它现在与这个解决方案一起工作。感谢您的反馈谢谢您的反馈，它与RPTw此解决方案配合使用。但是，还有一个疑问，我必须记录标记值NSLog（@“%d”，refButton.tag）；，但标记值始终显示为0。既然我需要标签值来检索相应的数据，那么在添加这些标签值时，您是如何将标签值添加到按钮的呢？如果没有，那么就这样做。如果问题仍然存在，请告诉我。