我有六个按钮的 Objective-C 工作代码，但我似乎没有找到如何使用 Swift 更改按钮的状态。那么如何让下面的代码在 Swift 中工作呢？
[self.button2 setBackgroundImage:[UIImage imageNamed:@"button2_selected.png"] forState: UIControlStateSelected];
button1.selected = NO;
button2.selected = !button2.selected;
button3.selected = NO;
button4.selected = NO;
button5.selected = NO;
button6.selected = NO;
检查一下：
var var_button_ = UIButton()
var_button_.setBackgroundImage(UIImage(named: "button2_selected.png"), forState: UIControlState.Normal)
var_button_.selected = false
var_button_.selected = !var_button_.selected
//var_button_.selected = true
谢谢
作者：JNYJ
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