Check state of Option-Key in SwiftUI (macOS)

问题

I'm looking for a way to check the state of the option-key in SwiftUI on macOS.

I.e. depending on whether the option key is pressed or not I want to perform different actions in the .onTapGesture closure.

回答1:

macOS-only SwiftUI has .modifiers modifier to specify EventModifiers, so your case is covered like in below example:

Rectangle()
    .fill(Color.yellow)
    .frame(width: 100, height: 40)
    .gesture(TapGesture().modifiers(.option).onEnded {
        print("Do anyting on OPTION+CLICK")
    })
    .onTapGesture {
        print("Do anyting on CLICK")
    }

来源：https://stackoverflow.com/questions/58643925/check-state-of-option-key-in-swiftui-macos