iphone - 单击另一个按钮时图像发生变化

Question

我正在为益智匹配游戏编写代码。我用 a 定义了 a UIButton，UIImage我添加了一个目标来改变UIImagea 的 a UIButton。我希望这张照片出现，直到我点击另一个UIButton或相同的UIButton，我该怎么做？！

这UIButton

mybutton1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[mybutton1 addTarget:self 
              action:@selector(method:) 
    forControlEvents:UIControlEventTouchDown];
question = [UIImage imageNamed:@"puzzle.jpg"];
[mybutton1 setBackgroundImage:question 
                     forState:UIControlStateNormal];

然后方法：

-(void) method: (UIButton*) sender{
    [sender setBackgroundImage:[UIImage imageNamed: @"cheerful-cat.jpg"] 
                      forState:UIControlStateNormal];
}

Answer 1

试试这个方法。。

Button*  mybutton1= [UIButton buttonWithType:UIButtonTypeCustom];
[mybutton1 addTarget:self 
              action:@selector(method:) 
    forControlEvents:UIControlEventTouchDown];
question = [UIImage imageNamed:@"puzzle.jpg"];
[mybutton1 setBackgroundImage:question 
                     forState:UIControlStateNormal];

-(void) method: (UIButton*) sender{
    [sender setBackgroundImage:[UIImage imageNamed: @"cheerful-cat.jpg"] 
                      forState:UIControlStateNormal];
}