Question

目前我在iPhone应用程序中工作，我为两个按钮创建了两个按钮并设置了图像，当用户触摸button2然后在button2内显示button1图像时，我尝试了我的关卡，但我无法修复此问题，请任何人帮助我

先谢谢

我试过了：

     btn1 = [UIButton buttonWithType:UIButtonTypeCustom];
    [btn1 setImage:[UIImage imageNamed:@"4.png"] forState:UIControlStateNormal];
    btn1.frame=CGRectMake(61, 60, 50, 50);
    [btn1 addTarget:self action:@selector(Button1Method) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn1];  

    btn2 = [UIButton buttonWithType:UIButtonTypeCustom];
    [btn2 setImage:[UIImage imageNamed:@"8.png"] forState:UIControlStateNormal];
    btn2.frame=CGRectMake(112, 60, 50, 50);
    [btn2 addTarget:self action:@selector(Button2Method) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn2]; 



-(void)Button2Method
{

 [btn2 setImage:[UIImage imageNamed:btn1.currentBackgroundImage] forState:UIControlStateNormal];

}

Answer 1

试试这个： -

[btn2 setImage:btn1.currentImage forState:UIControlStateNormal];

并且currentBackgroundImage是UIImage，您将其视为NSString这是错误的。

Answer 2

使用此

        UIImage *img = btn1.currentImage;
        [btn2 setImage:img forState:UIControlStateNormal];

Answer 3

这是因为您要将图片设置为按钮btn1 setImage:并访问背景图片btn1.currentBackgroundImage

所以更改您的代码经过测试

-(void)Button2Method
{
    [btn2 setImage:btn1.imageView.image forState:UIControlStateNormal];
}

如何在iPhone中获取按钮背景图像？

3 个答案: