https://github.com/johnno1962/HotSwiftUI

Utilities for Hot Reloading SwiftUI apps.
https://github.com/johnno1962/HotSwiftUI

Last synced: 3 months ago
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Utilities for Hot Reloading SwiftUI apps.

• Host: GitHub
• URL: https://github.com/johnno1962/HotSwiftUI
• Owner: johnno1962
• License: mit
• Created: 2021-03-01T15:32:42.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2024-07-16T10:59:13.000Z (4 months ago)
• Last Synced: 2024-07-18T14:39:36.771Z (4 months ago)
• Language: Swift
• Size: 11.7 KB
• Stars: 92
• Watchers: 6
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# HotSwiftUI

Utilitiy methods for use with [HotReloading](https://github.com/johnno1962/HotReloading) or [InjectionIII](https://github.com/johnno1962/InjectionIII) to make live code updates to fully functional SwiftUI Applictions.

Add this repo to your project and add the following to a source file.

```

@_exported import HotSwiftUI

```

This will make the `.eraseToAnyView()` method on `SwiftUI.View`

used to erase their type available throughout the app along with the

global `injectionObserver` variable you can observe to force the

View to update when code has been injected. SwiftUI is very well

suited to injection as, provided you observe the injectionObserver

which has an `@Published` injection counter, you can rest assured

your views will update as required.

In short, modify the end of your `SwiftUI` View body properties

to look like this:

```Swift

    var body: some View {

        // Your SwiftUI code...

        .eraseToAnyView()

    }

    #if DEBUG

    @ObservedObject var iO = injectionObserver

    #endif

    // or use the new property wrapper...

    @ObserveInjection var redraw

```

You need to do this for all view properties you'd like to inject

and have refesh on injection which is a bit tedious but the InjectionIII

or HotReloading app can make these changes automatically using the

"Prepare Project" Menu Item. You can check in these changes as, in a

"Release" build, these functions compile to a null operation.

There is a compatible version of this code along with ideas further developed for 

"hosting" UIViewControllers in the project https://github.com/krzysztofzablocki/Inject.