我有一個 UIButton，預期的行為是當它被點擊時，它應該具有藍色背景色，當未點擊時，它應該是白色。但是，我總是必須在第一次嘗試時雙擊它才能被選中......這是為什么？
class CheckmarkCell: UITableViewCell {
static let reuseIdentifier = String(describing: CheckmarkCell.self)
@IBOutlet private weak var titleLabel: UILabel!
@IBOutlet private weak var yesButton: UIButton!
private weak var delegate: CheckmarkCellDelegate?
private var value: Bool?
public func configure(title: String, value: Bool?, delegate: CheckmarkCellDelegate? = nil) {
self.titleLabel.text = title
self.value = value
self.delegate = delegate
self.yesButton.layer.masksToBounds = true
self.yesButton.layer.cornerRadius = self.yesButton.frame.width / 2
self.yesButton.layer.borderWidth = 1.0
self.yesButton.layer.borderColor = UIColor.NBABlue?.cgColor
self.yesButton.backgroundColor = UIColor.white
// This is the dot
self.yesButton.tintColor = UIColor.clear
// This block of code saves the values. If it is removed, when you scroll, values will all be deselected and false.
switch self.value {
case true:
// This is the saved state
self.yesButton.backgroundColor = UIColor.NBABlue
self.yesButton.tintColor = UIColor.clear
// Deselected, should e white.
case false:
self.yesButton.backgroundColor = UIColor.white
self.yesButton.tintColor = UIColor.clear
default:
break
}
}
@IBAction func buttonTapped(_ sender: UIButton) {
if sender.isSelected {
yesButton.isSelected = false
// The selected state
self.yesButton.backgroundColor = UIColor.NBABlue
self.yesButton.tintColor = UIColor.clear
if self.value == nil || self.value == false {
self.value = true
self.delegate?.checkmarkCell(self, selectedValue: self.value!)
}
} else {
yesButton.isSelected = true
self.yesButton.backgroundColor = UIColor.white
self.yesButton.tintColor = UIColor.clear
if self.value == nil || self.value == true {
self.value = false
self.delegate?.checkmarkCell(self, selectedValue: self.value!)
}
}
}
}
uj5u.com熱心網友回復：
單元格被重用，也在里面添加這個 configure
self.yesButton.tintColor = UIColor.clear // below this
self.yesButton.isSelected = self.value
uj5u.com熱心網友回復：
要洗掉藍色背景，您必須從故事板中清除色調。
在節檔案 IBAction 中寫下這一行。
sender.isSelected = !sender.isSelected
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