Add hidden property in PresentationDetent

[b0nsun9]

Hello!

First of all, I appreciate about this repository a lot. It's my life saver.

I found two things that can be improve when I use it.

Firstly, there is no hidden(close) option. So, I used .fraction(0) instead, but I'm not the only one who wanted hidden option(who my colleague).
Although, Perhaps your purpose was make exactly the same thing of SwiftUI's sheet, but I thought it isn't intuitive.

Secondly, the @State(or @Published) var isPresented that is outside of BottomSheet, isn't change to false by swipe down action.
When close BottonSheet, isPresented is still true, and never open again next time.

So, I added the hidden property and changed few lines.

Please consider merging my PR if you don't mind.

Thank you once again.

ps. As my english writing skill, I have attached images that what's changed.

Before

before.MP4

After

after.MP4

[Wouter125]

Hi thank you for your PR! I will check it out in more detail this weekend.

I fully understand what you mean, but I think we can have a boolean with SwipeToDismiss instead of a .hidden property to trigger this. This also allows for adding a custom callback on this.

It will move a bit away from the native Apple implementation indeed. I do think the comments to my PresentationDetent Enum are a perfect addition.

I will see what I can do. I have a couple of other fixes locally as well, but since work has been busy I haven't had time to implement it yet. Thank you for contributing, and I think I can make it work for you! 🙏

[Wouter125]

Closing this PR in favor of #31 .