[Feature] Add transparent present cover view

[blyscuit]

What happened 👀

• Add PresentCoverTransparentView to present a cover view with transparent background.
• Update iOS version to 13 to support SwiftUI.
• Update podspec to 0.1.1.

Insight 📝

• The new view is meant to be used with FlowStacks.presentCover or UIKit. modalPresentationStyle = .presentCover.

What it does

When presenting a .presentCover screen by FlowStacks, FlowStacks creates a UIHostingView that contains views with background color.

To present a view with no background color, these are set on the views

backgroundColor = .clear
isOpaque = true

Why user .presentCover

.presentCover guaranteed that the view is present above all existing views. To visualize this clearer, alternative are discussed:

• .overlay: Overlay lives on the current view and does not translate to other views. Overlay is also order dependent when declare

Text("AAA")
.overlay { Text("BBB") }
.overlay { Text("CCC") } // CCC is always on top of BBB

• .fullScreenCover: Lives on the current view and does not translate to other views. Can have only on active fullScreenCover at a time. Use UIHostingView and require this library.

Proof Of Work 📹

Example usage:

FlowStack($path, withNavigation: true) {
            HomeView()
                .flowDestination(for: Int.self, destination: { number in
                    NumberView(number: number)
                        .frame(width: 200, height: 200)
                        .background(.black.opacity(0.4))
                        .cornerRadius(20)
                        .presentCoverTransparentBackground()
                })
        }

Simulator.Screen.Recording.-.iPhone.15.Pro.-.2024-08-28.at.17.03.33.mp4

[ducbm051291]

The rest is good to me 👍

[ducbm051291]

The name uiHostingViewCount might not clearly convey its purpose. Consider renaming it to something more descriptive

Suggested change

	private let uiHostingViewCount: Int
	private let maxUIHostingViewsToTraverse: Int: Int: Int

[ducbm051291]

Suggested change

	private let uiHostingViewCount: Int
	private let maxUIHostingViewsToTraverse: Int

[ducbm051291]

Suggested change

	var traversedUIHostingView = 0
	var traversedCount = 0

[ducbm051291]

Instead of force unwrapping, you can safely unwrap them using if let or guard let statements.

Suggested change

	while superview != nil && traversedUIHostingView < uiHostingViewCount {
	while let superview = currentSuperview, traversedCount < maxUIHostingViewsToTraverse {