To demonstrate property wrappers, I want to start with a simple struct that wraps some kind of BinaryInteger value. We’re going to give this thing some custom code when it comes to setting its wrapped value, so that if the new value is below 0 we instead make it exactly 0 so that this struct can never be negative.
Our code would look like this:
struct NonNegative<Value: BinaryInteger> {
var value: Value
| <?xml version="1.0" encoding="UTF-8"?> | |
| <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> | |
| <plist version="1.0"> | |
| <array/> | |
| </plist> |
| // ImageSaver.swift | |
| // | |
| // Created by Brent Michalski on 11/30/19. | |
| // Copyright © 2019 Brent Michalski. All rights reserved. | |
| // | |
| import UIKit | |
| class ImageSaver: NSObject { | |
| var successHandler: (() -> Void)? |
| // | |
| // KeyboardAvoiding+ViewModifier.swift | |
| // | |
| // Created by Michalski (US), James B on 11/27/19. | |
| // Copyright © 2019 Brent Michalski. All rights reserved. | |
| // | |
| import SwiftUI | |
| import Combine |
| // | |
| // DismissingKeyboard+ViewModifier.swift | |
| // | |
| // Created by Michalski (US), James B on 11/27/19. | |
| // Copyright © 2019 Brent Michalski. All rights reserved. | |
| // | |
| import SwiftUI | |
| struct DismissingKeyboard: ViewModifier { |
| // | |
| // ImagePicker.swift | |
| // | |
| // Created by Brent Michalski on 11/25/19. | |
| // Copyright © 2019 Perlguy, Inc. All rights reserved. | |
| // | |
| import SwiftUI | |
| struct ImagePicker: UIViewControllerRepresentable { |
# Xcode
#
# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
## User settings
xcuserdata/
AnyHashable and AnySequence, and all they do is act as shells that forward on their operations to whatever they contain, without revealing what the contents are to anything externally.