Question

我对uibutton有一些问题。我想要一个按钮突出显示按下但是当按下其他按钮时不亮，但我无法让前一个按钮不亮。任何人都可以建议吗？

@interface ViewController : UIViewController
{
    UIButton *button1;
    UIButton *button2;
}
@property (nonatomic, retain) IBOutlet UIButton *button1;
@property (nonatomic, retain) IBOutlet UIButton *button2;

-(IBAction)button1:(id)sender;
-(IBAction)button2:(id)sender;
-(void) highlightButton: (UIButton *) button;
-(void) unhighlightButton: (UIButton *) button;
@end


@interface ViewController ()
@end
@implementation ViewController
@synthesize button1, button2;

-(IBAction)button1:(id)sender
{

    [self performSelector:@selector(highlightButton:) withObject:sender afterDelay:0.0];
    [button2 performSelector:@selector(unhighlightButton:) withObject:button2 afterDelay:0.0];
}

-(IBAction)button2:(id)sender
{
    [self performSelector:@selector(highlightButton:) withObject:sender afterDelay:0.0];
    [button1 performSelector:@selector(unhighlightButton:) withObject:button1 afterDelay:0.0];
}

-(void) highlightButton:(UIButton *)button
{
    [button setHighlighted:YES];
}

-(void) unhighlightButton:(UIButton *)button
{
    [button setHighlighted:NO];
}

@end

Answer 1

由于您正在使用属性，因此请以两种方式更改这两行：

[self performSelector:@selector(unhighlightButton:) withObject:self.button2 afterDelay:0.0];

和

[self performSelector:@selector(unhighlightButton:) withObject:self.button1 afterDelay:0.0];

1）属性应以“self.”

引用

2）您正在调用视图控制器中的方法“unhighlightButton:”，因此您需要在“self”上调用它而不是“button”。 “button”通过“withObject:”参数传递。

为什么使用“performSelector”方法呢？

您可以重写其中一个操作方法：

-(IBAction)buttonTouched:(id)sender
{
    [sender setHighlighted: YES];
    if(sender == self.button1)
    {
       [self.button2 setHighlighted: NO];
    } else {
       [self.button1 setHighlighted: NO];
    }
}

并将两个按钮指向一个IBAction。

Answer 2

首先检查IBOutlet和IBAction连接是否正确连接。

-(IBAction)button1:(id)sender
    {
        [self performSelector:@selector(highlightButton:) withObject:sender afterDelay:0.0];
        [self performSelector:@selector(unhighlightButton:) withObject:button2 afterDelay:0.0];
    }

    -(IBAction)button2:(id)sender
    {
        [self performSelector:@selector(highlightButton:) withObject:sender afterDelay:0.0];
        [self performSelector:@selector(unhighlightButton:) withObject:button1 afterDelay:0.0];
    }

    -(void) highlightButton:(UIButton *)button
    {
        [button setHighlighted:YES];
    }

    -(void) unhighlightButton:(UIButton *)button
    {
        [button setHighlighted:NO];
    }

Answer 3

您还可以使用UIButton的selected属性：对于两个按钮选择器将是相同的“buttonTouched”

-(IBAction)buttonTouched:(id)sender {

     button1.selected = NO;
     button2.selected = NO;

     if (sender == button1) {
          button1.selected = YES;
     } else if (sender == button2) {
          button2.selected = YES;
     }
}

试试这个。

Answer 4

你可以做下面这样的事情......

 -(IBAction)button1:(id)sender
 {

 button1.highlighted = YES;
  button2.highlighted = NO;
 }

 -(IBAction)button2:(id)sender
 {
  button2.highlighted = YES;
  button1.highlighted = NO;
 }

让我知道它的工作与否!!!!!

快乐编码!!!!

不能解开扼流圈

4 个答案: