UIGestureRecognizer on only one part of the screen - ios

Question

If you look into the image, you'll see a textview, button and a slider.
I have completed all the steps except for the last one which is, when I tap on the slider, it constantly disappear. I know it disappear because I implemented UITapGestureRecognizer.
I guess my question is, I want the slider to disappear everytime I tap anywhere on the screen but when I am using the slider, I dont want the slider to disappear which is happening now every time I release my tap.
I have tried implementing one more UITapGestureRecognizer in sizeRefont with a function to keep sizeRefont.isHidden false but when I do that, the slider will not disappear whenever I tap on the screen.
I tried putting sizeRefont.isHidden = false in sizeRefont action and it doesnt work either.
class ResizeController: UIViewController {
#IBOutlet weak var sizeRefont: UISlider!
#IBOutlet weak var textView: UITextView!
override func viewDidLoad() {
super.viewDidLoad()
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(dismissRefontSize(_:)))
view.addGestureRecognizer(tap)
}
#IBAction func sizeRefont(_ sender: AnyObject) {
let fontSize = CGFloat(sizeRefont.value)
textView.font = UIFont(name: textView.font!.fontName, size: fontSize * 30.0)
}
#IBAction func showSlider(_ sender: Any) {
sizeRefont.isHidden = false
}
func dismissRefontSize(_ sender: UITapGestureRecognizer) {
if sender.location(in: sizeRefont){
sizeRefont.isHidden = false
} else {
sizeRefont.isHidden = true
}
}
}
There is an error on if sender.location(in: sizeRefont) where it says CGPoint is not convertible to Bool
Image

Answer 1

First thing you need to do is you need to Adjust the dismissRefontSize() method to to the following :
func dismissRefontSize(_ sender: UITapGestureRecognizer) {
let location = sender.location(in: view)
If sizeReFont.frame.contains(location) {
// do nothing
}else {
sizeReFont.isHidden = true
}
}
The other thing you need to adjust is creating the tap recognized in your viewDidLoad() to the following:
let tap = UITapGestureRecognizer(target: self, action : #selector(dismissRefontSize(_:)))