如何检测键盘按键时的特定按键?

huangapple go评论70阅读模式
英文:

How to detect specific keys on keyboard keypress?

问题

Sure, here's the translated code portion:

import SwiftUI

struct ContentView: View {
    var body: some View {
        VStack {
            Rectangle()
                .fill(.white)
                .frame(width: 100, height: 100)
                .onHover { hover in
                    func doSomething(event: NSEvent) -> NSEvent? {
                        guard !event.isARepeat else {
                            return nil
                        }

                        print("按下字母 'A' 的键码是" + event.keyCode.description)
                        if event.keyCode == 0 {
                            print("按下了字母 'A'")
                            return nil
                        }

                        return event
                    }
                }
        }
        .padding()
    }
}

Please note that I've translated the code while preserving its structure.

英文:

How to detect letter 'A' keypress in swiftUI? macOS.

import SwiftUI

struct ContentView: View {
    var body: some View {
        VStack {
           Rectangle()
                .fill(.white)
                .frame(width: 100, height: 100)
                .onHover { Bool in
                    
                    func doSomething(event: NSEvent) -> NSEvent? {
                        guard !event.isARepeat else {
                            return nil
                        }
                        
                        print ("key code for letter 'A' is" + event.keyCode.description)
                        if event.keyCode == 10 {
                            print("Letter 'A' pressed")
                            
                            return nil
                        }
                        
                        return event
                    }
                    
                }
        }
        .padding()
    }
}

P.S: To the person who will give negative votes for this question anyways --> it's a tradition in stackoverflow to give negative votes as much as possible. so, go ahead.

答案1

得分: 0

struct ContentView: View {
    @State private var keyPressed: String = ""

    var body: some View {
        Text(keyPressed)
            .onAppear {
                NSEvent.addLocalMonitorForEvents(matching: [.keyDown]) { nsevent in
                    if let char = nsevent.characters {
                        keyPressed = char
                    }
                    return nsevent
                }
            }
    }
}
英文:

The following code lets you type any key and display its character.
Adapt this to detect specific key pressed on the keyboard in macos.

struct ContentView: View {
    @State private var keyPressed: String = ""
    
    var body: some View {
        Text(keyPressed)
            .onAppear {
                NSEvent.addLocalMonitorForEvents(matching: [.keyDown]) { nsevent in
                    if let char = nsevent.characters {
                        keyPressed = char
                    }
                    return nsevent
                }
            }
    }
}

Do not declare functions, such as func doSomething(event: NSEvent) inside the .onHover{...}, it is not the appropriate place to do this.

huangapple
  • 本文由 发表于 2023年5月15日 12:09:14
  • 转载请务必保留本文链接:https://go.coder-hub.com/76250828.html
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