How to activate different button behaviors when a modifier key is pressed 관련

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How to activate different button behaviors when a modifier key is pressed | SwiftUI by Example

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How to activate different button behaviors when a modifier key is pressed

Updated for Xcode 16

New in macOS 15

macOS often shows different button actions when the user holds down modifiers such as Command or Option, and we can get this in our own apps using the modifierKeyAlternate() modifier.

Attach this modifier to a button, specifying which modifiers to watch for, and also what to show when those keys are pressed.

For example, we might make a button that shows a regular amount of detail normally, but when Option is held down it shows some extra detail:

Button("Show Details") {
    print("Regular button action")
}
.modifierKeyAlternate(.option) {
    Button("Show Verbose Details") {
        print("Hold down Option to see this")
    }
}

For extra power, you can use multiple modifierKeyAlternate() modifiers to add different behaviors to different keys, or specify an array of keys to watch for several at once:

Button("Show Details") {
    print("Regular button action")
}
.modifierKeyAlternate([.option]) {
    Button("Show Verbose Details") {
        print("Hold down option to see this")
    }
}
.modifierKeyAlternate([.command, .option]) {
    Button("Show Maximum Details") {
        print("Hold down Command and Option to see this")
    }
}

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