如何从单选按钮获取值到swift 5中的变量

Question

Need to save ther value from the radio button to a variable

@IBOutlet weak var userButton: UIButton!
@IBOutlet weak var propertyButton: UIButton!

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
}
@IBAction func btClicked (sender: UIButton) {
    let buttonArray = [userButton , propertyButton]
    buttonArray.forEach {_ in 
        $0?.isSelected = false
    }
}

Answer 1

创建一个变量来存储按钮的值

var strVal = ""

为两个按钮创建两个不同的插座

@IBAction func btnUserClicked(_ sender: UIButton) {
    setValue(isUser: true)
}
@IBAction func btnPropertyOwnerClicked(_ sender: UIButton) {
    setValue(isUser: false)
}

setValue(isUser : Bool) 方法将存储您选择的按钮值并根据选择更改按钮的图像

func setValue(isUser : Bool){
    if isUser{
        strVal = "User"
        btnUser.setImage(UIImage(named: "circle-fill"), for: .normal)
        btnPropertyOwner.setImage(UIImage(named: "circle"), for: .normal)
    }
    else{
        strVal = "Property Owner"
        btnPropertyOwner.setImage(UIImage(named: "circle-fill"), for: .normal)
        btnUser.setImage(UIImage(named: "circle"), for: .normal)
    }
}

图片'circle'是你已经在按钮上的默认图片，图片'circle-fill'用来表明你的按钮是否被选中。

或者你可以使用 button 的 sender.tag 属性：

@IBAction func btnUserClicked(_ sender: UIButton) {
    //setValue(isUser: true)
    if(sender.tag == 0){
        strVal = "user"
        btnUser.setImage(UIImage(named: "circle-fill"), for: .normal)
        btnPropertyOwner.setImage(UIImage(named: "circle"), for: .normal)
    }
    else{
        strVal = "property user"
        btnPropertyOwner.setImage(UIImage(named: "circle-fill"), for: .normal)
        btnUser.setImage(UIImage(named: "circle"), for: .normal)
    }
}