If you've ever needed to check whether a view is visible to the user, you might have used the isHidden property. However, this method falls short in scenarios where a view can appear hidden due to overlapping by other views. To address this, I created a simple extension to provide a more comprehensive visibility check.
extension UIView {
/// Checkes if the view is (mostly) visible to user or not.
/// Internaly it checks following things
/// - Should NOT be hidden
/// - Should NOT be completely transparent
/// - Bound should NOT be empty
/// - Should be in some window i.e. in view heirarchy
/// - Center should be directly visible to user i.e. NOT overlapped with other views
var isMostlyVisible: Bool {
guard !isHidden,
alpha > 0,
!bounds.isEmpty,
let window,
window.hitTest(window.convert(center, from: self.superview), with: nil) == self else {
return false
}
return true
}
}
Here is the extension in action:
Thank you for reading.
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