ios - 单选某段 `UIButton`

Question

假设我有 10 个 UIButton，如下所示

我想实现单选，但我不知道该怎么做。条件如下:

首先，ALL 按钮会在选定的位置(突出显示等)。当我单击另一个按钮，如 VCU 按钮时，VCU 按钮将突出显示，而 ALL 按钮将处于正常状态(未突出显示)。

代码片段:

@IBAction func buttonDisplayAction(_ sender: UIButton) {
    if sender == self.buttonAll {
        self.currNr = -1
        self.filteredDataRoomStatus = self.dataRoomStatus
    } else if sender == self.buttonVCU {
        self.currNr = 1
        self.isButtonSelected = true
        self.filteredDataRoomStatus = filterArray(dataRoomStatus, keywords: "zistatus", searchStr: "\(self.currNr)", equalFlag: true)
    } else if sender == self.buttonOC {
        self.currNr = 5
        self.isButtonSelected = true
        self.filteredDataRoomStatus = filterArray(dataRoomStatus, keywords: "zistatus", searchStr: "\(self.currNr)", equalFlag: true)
    } else if sender == self.buttonVCC {
        self.currNr = 0
        self.isButtonSelected = true
        self.filteredDataRoomStatus = filterArray(dataRoomStatus, keywords: "zistatus", searchStr: "\(self.currNr)", equalFlag: true)
    } else if sender == self.buttonVD {
        self.currNr = 2
        self.isButtonSelected = true
        self.filteredDataRoomStatus = filterArray(dataRoomStatus, keywords: "checkout zistatus", searchStr: "0 2", equalFlag: false)
    } else if sender == self.buttonED {
        self.currNr = 3
        self.isButtonSelected = true
        self.filteredDataRoomStatus = filterArray(dataRoomStatus, keywords: "zistatus", searchStr: "\(self.currNr)", equalFlag: true)
    } else if sender == self.buttonOD {
        self.currNr = 4
        self.isButtonSelected = true
        self.filteredDataRoomStatus = filterArray(dataRoomStatus, keywords: "zistatus", searchStr: "\(self.currNr)", equalFlag: true)
    } else if sender == self.buttonCO {
        self.currNr = 12
        self.isButtonSelected = true
        self.filteredDataRoomStatus = filterArray(dataRoomStatus, keywords: "checkout", searchStr: "1", equalFlag: true)
    } else if sender == self.buttonDnD {
        self.currNr = 8
        self.isButtonSelected = true
        self.filteredDataRoomStatus = filterArray(dataRoomStatus, keywords: "zistatus", searchStr: "\(self.currNr)", equalFlag: true)
    } else if sender == self.buttonOOO {
        self.currNr = 6
        self.isButtonSelected = true
        self.filteredDataRoomStatus = filterArray(dataRoomStatus, keywords: "zistatus", searchStr: "\(self.currNr)", equalFlag: true)
    }

    do {
        let currButton: UIButton = (sender as UIButton)
        currButton.isSelected = !currButton.isSelected

        if currButton.isSelected {
            currButton.backgroundColor = UIColor.darkGray
        } else {
            currButton.backgroundColor = UIColor.clear
        }
   }
}

上面的代码进行了多选，但我需要单选。 我读过this和 this但我还是卡住了。

Answer 1

我觉得很简单，试试吧

@IBAction func onClickButton(_ sender: UIButton) {
    deselectAllButtons()
    sender.isSelected = true
}
func deselectAllButtons(){
    for subView in view.subviews 
      {
        // Set all the other buttons as normal state
        if let button = subView as? UIButton {
            button.isSelected = false
        }
    }
   //Or you can simply do write above for loop code with one line
  /*
   view.subviews.forEach { ($0 as? UIButton)?.isSelected = false }
  */
}