How to hide label when its text is nil in swift - swift

Question

I am adding badgeLabel to cartBtn.. here I am unable to convert integer to string and string to integer to hide badgeLabel if its count is 0
code:
public var badgeText: String? {
didSet {
let wasNil = NSString(string: badgeText ?? "0").integerValue <= 0
badgeLabel.isHidden = badgeText == nil
badgeLabel.text = badgeText
setSize()
if animated {
let animations: () -> Void = { [weak badgeLabel] in
badgeLabel?.layer.transform = CATransform3DMakeScale(1, 1, 1)
}
if wasNil {
badgeLabel.layer.transform = CATransform3DMakeScale(0.1, 0.1, 0.1)
}
UIView.animate(withDuration: 0.5,
delay: 0.2,
usingSpringWithDamping: 0.3,
initialSpringVelocity: 0.3,
options: UIView.AnimationOptions(),
animations: animations,
completion: nil)
}
}
}
public var badgeBackgroundColor = UIColor.red {
didSet {
badgeLabel.backgroundColor = badgeBackgroundColor
}
}
like this adding count to label
let cartQty = UserDefaults.standard.value(forKey: "cartCount")
cartBtn.badgeText = cartQty as? String
here if cartBtn.badgeText is nil then also i am showing badgeLabel but if its nil i don't want to show badgeLabel.. how to do hat.. please do help

Answer 1

It looks like you're not actually using the animations when wasNil is true. Also don't use NSString, it's an older API now and you can just use a easy Int initializer to go from String to Int.
Here's some updated code:
public var badgeText: String? {
didSet {
// changing this variable name for clarity.
let isTextAString: Bool = Int(badgeText ?? "") == nil
badgeLabel.isHidden = isTextAString
badgeLabel.text = badgeText
setSize()
if animated {
UIView.animate(withDuration: 0.5,
delay: 0.2,
usingSpringWithDamping: 0.3,
initialSpringVelocity: 0.3,
options: UIView.AnimationOptions()) {
self.badgeLabel?.layer.transform = CATransform3DMakeScale(1, 1, 1)
// You can just do this `if` statement inside the animation block
if isTextAString {
self.badgeLabel.layer.transform = CATransform3DMakeScale(0.1, 0.1, 0.1)
}
} completion: { (_) in }
}
}
}