SwiftUIMacros

1.2

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Wouter01/SwiftUI-Macros

What's New

v1.2

2024-04-27T02:08:38Z
  • Added @FocusedValues and @FocusedValueKey macros. These are similar to the extisting macros, but for FocusedValues
  • Renamed @EnvironmentStorage to @EnvironmentValues
  • Renamed @EnvironmentValue to @EnvironmentKey to better align with @FocusedValueKey (@FocusedValue could not be used, as that is already a property wrapper in SwiftUI)
  • Added extra checks: @EnvironmentValues and @FocusedValues can now only be used on extensions of their respective types
  • The generated types are now private instead of internal to better align with common SwiftUI code.
  • Update SwiftSyntax package to 510

SwiftUI-Macros

A library of useful macros for SwiftUI.

Swift 5.9 or later is required to use this package.

Installation

Swift Package Manager

Add the dependency:

dependencies: [
    .package(url: "https://github.com/Wouter01/SwiftUI-Macros.git", from: "1.0.0")
]

Add the dependency to your target:

.target(
   name: "MyTarget",
   dependencies: [.product(name: "SwiftUIMacros", package: "SwiftUI-Macros")]
)

Environment

To allow easier creation of new environment keys, two macros are available:

EnvironmentKey

Apply this macro to a variable inside an EnvironmentValues extension to add it to the environment. The assigned value is the default value and is required, unless the type is Optional. The type can be inferred by its value, just like in normal Swift code.

import SwiftUIMacros

extension EnvironmentValues {
    @EnvironmentKey
    var alignment: Alignment = .center
}

// Expands to
extension EnvironmentValues {
    var alignment: Alignment {
      get {
        self[EnvironmentKey_alignment.self]
      }
      set {
        self[EnvironmentKey_alignment.self] = newValue
      }
    }
    
    private struct EnvironmentKey_alignment: EnvironmentKey {
       static let defaultValue: Alignment = .center
    }
}

EnvironmentValues

Apply this to an EnvironmentValues extension to add the EnviromentKey macro to each variable inside the extension.

import SwiftUIMacros

@EnvironmentValues
extension EnvironmentValues {
    var alignment: Alignment = .center
    
    var secondaryFont: Font?
    
    var gridLines = 0
}

// Expands to
extension EnvironmentValues {
    @EnvironmentKey
    var alignment: Alignment = .center
    
    @EnvironmentKey
    var secondaryFont: Font?
    
    @EnvironmentKey
    var gridLines = 0
}

Focus

To allow easier creation of new focusedValue keys, two macros are available:

FocusedValueKey

Apply this macro to a variable inside a FocusedValues extension to add it to the focused values.

import SwiftUIMacros

extension FocusedValues {
    @FocusedValueKey
    var enabled: Bool?
}

// Expands to
extension FocusedValues {
    @FocusedValueKey
    var enabled: Bool? {
        get {
            self [FocusedValueKey_enabled.self]
        }
        set {
            self [FocusedValueKey_enabled.self] = newValue
        }
    }
    
    private struct FocusedValueKey_enabled: FocusedValueKey {
        typealias Value = Bool
    }
}

FocusedValues

Apply this to an FocusedValues extension to add the FocusedValueKey macro to each variable inside the extension.

import SwiftUIMacros

@FocusedValues
extension FocusedValues {
    var showCompletions: Binding<Bool>?

    var value: Int?
}

// Expands to
extension FocusedValues {
    @FocusedValueKey
    var showCompletions: Binding<Bool>?

    @FocusedValueKey
    var value: Int?
}

Description

  • Swift Tools 5.9.0
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Dependencies

Last updated: Fri May 10 2024 12:34:06 GMT-0900 (Hawaii-Aleutian Daylight Time)