我有一个LSUIElement显示菜单栏状态项的应用程序。应用程序可以显示一个包含文本字段的对话窗口。
如果用户右键单击/控制单击文本字段，则会出现一个菜单，允许剪切、复制、粘贴等。但是，标准的 Command-X、Command-C 和 Command-V 键盘快捷键在场地。我认为这是因为我的应用程序没有提供定义了这些快捷方式的编辑菜单。
我已尝试按照Ship Some Code博客中的建议将编辑菜单项添加到我的应用程序菜单中，但这不起作用。可以使用编辑菜单中的菜单项，但键盘快捷键仍然不起作用。
我可以想象一些破解键盘处理的方法，但是有没有“推荐”的方法来完成这项工作？
（有关应用程序的详细信息，请参阅菜单栏倒计时。）
相关问题：复制/粘贴在模态窗口中不起作用
改进 CocoaRocket 解决方案：
以下节省了必须子类 NSTextField 并记住在整个应用程序中使用子类；它还将为处理它们的其他响应者启用复制、粘贴和朋友，例如。NSTextView。
将它放在 NSApplication 的子类中，并相应地更改 Info.plist 中的主体类。
- (void) sendEvent:(NSEvent *)event {
if ([event type] == NSKeyDown) {
if (([event modifierFlags] & NSDeviceIndependentModifierFlagsMask) == NSCommandKeyMask) {
if ([[event charactersIgnoringModifiers] isEqualToString:@"x"]) {
if ([self sendAction:@selector(cut:) to:nil from:self])
return;
}
else if ([[event charactersIgnoringModifiers] isEqualToString:@"c"]) {
if ([self sendAction:@selector(copy:) to:nil from:self])
return;
}
else if ([[event charactersIgnoringModifiers] isEqualToString:@"v"]) {
if ([self sendAction:@selector(paste:) to:nil from:self])
return;
}
else if ([[event charactersIgnoringModifiers] isEqualToString:@"z"]) {
if ([self sendAction:@selector(undo:) to:nil from:self])
return;
}
else if ([[event charactersIgnoringModifiers] isEqualToString:@"a"]) {
if ([self sendAction:@selector(selectAll:) to:nil from:self])
return;
}
}
else if (([event modifierFlags] & NSDeviceIndependentModifierFlagsMask) == (NSCommandKeyMask | NSShiftKeyMask)) {
if ([[event charactersIgnoringModifiers] isEqualToString:@"Z"]) {
if ([self sendAction:@selector(redo:) to:nil from:self])
return;
}
}
}
[super sendEvent:event];
}
// Blank Selectors to silence Xcode warnings: 'Undeclared selector undo:/redo:'
- (IBAction)undo:(id)sender {}
- (IBAction)redo:(id)sender {}
对我有用的是使用CocoaRocket的Copy and Paste Keyboard Shortcuts中介绍的 View 解决方案。
基本上，这意味着继承 NSTextField 并覆盖performKeyEquivalent:.
更新： CocoaRocket 网站显然已经消失了。这是 Internet 存档链接： http://web.archive.org/web/20100126000339/http: //www.cocoarocket.com/articles/copypaste.html
编辑：Swift 代码看起来像这样
class Editing: NSTextField {
private let commandKey = NSEventModifierFlags.CommandKeyMask.rawValue
private let commandShiftKey = NSEventModifierFlags.CommandKeyMask.rawValue | NSEventModifierFlags.ShiftKeyMask.rawValue
override func performKeyEquivalent(event: NSEvent) -> Bool {
if event.type == NSEventType.KeyDown {
if (event.modifierFlags.rawValue & NSEventModifierFlags.DeviceIndependentModifierFlagsMask.rawValue) == commandKey {
switch event.charactersIgnoringModifiers! {
case "x":
if NSApp.sendAction(Selector("cut:"), to:nil, from:self) { return true }
case "c":
if NSApp.sendAction(Selector("copy:"), to:nil, from:self) { return true }
case "v":
if NSApp.sendAction(Selector("paste:"), to:nil, from:self) { return true }
case "z":
if NSApp.sendAction(Selector("undo:"), to:nil, from:self) { return true }
case "a":
if NSApp.sendAction(Selector("selectAll:"), to:nil, from:self) { return true }
default:
break
}
}
else if (event.modifierFlags.rawValue & NSEventModifierFlags.DeviceIndependentModifierFlagsMask.rawValue) == commandShiftKey {
if event.charactersIgnoringModifiers == "Z" {
if NSApp.sendAction(Selector("redo:"), to:nil, from:self) { return true }
}
}
}
return super.performKeyEquivalent(event)
}
}
编辑： Swift 3 代码看起来像这样
class Editing: NSTextView {
private let commandKey = NSEventModifierFlags.command.rawValue
private let commandShiftKey = NSEventModifierFlags.command.rawValue | NSEventModifierFlags.shift.rawValue
override func performKeyEquivalent(with event: NSEvent) -> Bool {
if event.type == NSEventType.keyDown {
if (event.modifierFlags.rawValue & NSEventModifierFlags.deviceIndependentFlagsMask.rawValue) == commandKey {
switch event.charactersIgnoringModifiers! {
case "x":
if NSApp.sendAction(#selector(NSText.cut(_:)), to:nil, from:self) { return true }
case "c":
if NSApp.sendAction(#selector(NSText.copy(_:)), to:nil, from:self) { return true }
case "v":
if NSApp.sendAction(#selector(NSText.paste(_:)), to:nil, from:self) { return true }
case "z":
if NSApp.sendAction(Selector(("undo:")), to:nil, from:self) { return true }
case "a":
if NSApp.sendAction(#selector(NSResponder.selectAll(_:)), to:nil, from:self) { return true }
default:
break
}
}
else if (event.modifierFlags.rawValue & NSEventModifierFlags.deviceIndependentFlagsMask.rawValue) == commandShiftKey {
if event.charactersIgnoringModifiers == "Z" {
if NSApp.sendAction(Selector(("redo:")), to:nil, from:self) { return true }
}
}
}
return super.performKeyEquivalent(with: event)
}
}
我和你有同样的问题，我想我已经找到了一个更简单的解决方案。您只需将原始主菜单保留在 MainMenu.xib 中 - 它不会显示，但所有操作都会得到正确处理。诀窍是它必须是原始的，如果你只是从库中拖动一个新的 NSMenu，应用程序不会将其识别为主菜单，我不知道如何将其标记为主菜单（如果你取消选中 LSUIElement，你会看到它不会出现在顶部，如果它不是原始的）。如果您已经删除了它，您可以创建一个新的示例应用程序并从其 NIB 中拖动一个菜单，这也可以。
我还改进了 Adrian 的解决方案，使其在 Caps Lock 开启时也能正常工作：
- (void)sendEvent:(NSEvent *)event
{
if (event.type == NSKeyDown)
{
NSString *inputKey = [event.charactersIgnoringModifiers lowercaseString];
if ((event.modifierFlags & NSDeviceIndependentModifierFlagsMask) == NSCommandKeyMask ||
(event.modifierFlags & NSDeviceIndependentModifierFlagsMask) == (NSCommandKeyMask | NSAlphaShiftKeyMask))
{
if ([inputKey isEqualToString:@"x"])
{
if ([self sendAction:@selector(cut:) to:nil from:self])
return;
}
else if ([inputKey isEqualToString:@"c"])
{
if ([self sendAction:@selector(copy:) to:nil from:self])
return;
}
else if ([inputKey isEqualToString:@"v"])
{
if ([self sendAction:@selector(paste:) to:nil from:self])
return;
}
else if ([inputKey isEqualToString:@"z"])
{
if ([self sendAction:NSSelectorFromString(@"undo:") to:nil from:self])
return;
}
else if ([inputKey isEqualToString:@"a"])
{
if ([self sendAction:@selector(selectAll:) to:nil from:self])
return;
}
}
else if ((event.modifierFlags & NSDeviceIndependentModifierFlagsMask) == (NSCommandKeyMask | NSShiftKeyMask) ||
(event.modifierFlags & NSDeviceIndependentModifierFlagsMask) == (NSCommandKeyMask | NSShiftKeyMask | NSAlphaShiftKeyMask))
{
if ([inputKey isEqualToString:@"z"])
{
if ([self sendAction:NSSelectorFromString(@"redo:") to:nil from:self])
return;
}
}
}
[super sendEvent:event];
}
Thomas Kilian solution in swift 3.
private let commandKey = NSEventModifierFlags.command.rawValue
private let commandShiftKey = NSEventModifierFlags.command.rawValue | NSEventModifierFlags.shift.rawValue
override func performKeyEquivalent(with event: NSEvent) -> Bool {
if event.type == NSEventType.keyDown {
if (event.modifierFlags.rawValue & NSEventModifierFlags.deviceIndependentFlagsMask.rawValue) == commandKey {
switch event.charactersIgnoringModifiers! {
case "x":
if NSApp.sendAction(#selector(NSText.cut(_:)), to:nil, from:self) { return true }
case "c":
if NSApp.sendAction(#selector(NSText.copy(_:)), to:nil, from:self) { return true }
case "v":
if NSApp.sendAction(#selector(NSText.paste(_:)), to:nil, from:self) { return true }
case "z":
if NSApp.sendAction(Selector(("undo:")), to:nil, from:self) { return true }
case "a":
if NSApp.sendAction(#selector(NSResponder.selectAll(_:)), to:nil, from:self) { return true }
default:
break
}
}
else if (event.modifierFlags.rawValue & NSEventModifierFlags.deviceIndependentFlagsMask.rawValue) == commandShiftKey {
if event.charactersIgnoringModifiers == "Z" {
if NSApp.sendAction(Selector(("redo:")), to:nil, from:self) { return true }
}
}
}
return super.performKeyEquivalent(with: event)
}
Xcode10/Swift 4.2 解决方案：
import Cocoa
extension NSTextView {
override open func performKeyEquivalent(with event: NSEvent) -> Bool {
let commandKey = NSEvent.ModifierFlags.command.rawValue
let commandShiftKey = NSEvent.ModifierFlags.command.rawValue | NSEvent.ModifierFlags.shift.rawValue
if event.type == NSEvent.EventType.keyDown {
if (event.modifierFlags.rawValue & NSEvent.ModifierFlags.deviceIndependentFlagsMask.rawValue) == commandKey {
switch event.charactersIgnoringModifiers! {
case "x":
if NSApp.sendAction(#selector(NSText.cut(_:)), to:nil, from:self) { return true }
case "c":
if NSApp.sendAction(#selector(NSText.copy(_:)), to:nil, from:self) { return true }
case "v":
if NSApp.sendAction(#selector(NSText.paste(_:)), to:nil, from:self) { return true }
case "z":
if NSApp.sendAction(Selector(("undo:")), to:nil, from:self) { return true }
case "a":
if NSApp.sendAction(#selector(NSResponder.selectAll(_:)), to:nil, from:self) { return true }
default:
break
}
} else if (event.modifierFlags.rawValue & NSEvent.ModifierFlags.deviceIndependentFlagsMask.rawValue) == commandShiftKey {
if event.charactersIgnoringModifiers == "Z" {
if NSApp.sendAction(Selector(("redo:")), to:nil, from:self) { return true }
}
}
}
return super.performKeyEquivalent(with: event)
}
}
用于 Thomas Kilian 解决方案的 Swift 4.2
class MTextField: NSSecureTextField {
private let commandKey = NSEvent.ModifierFlags.command.rawValue
private let commandShiftKey = NSEvent.ModifierFlags.command.rawValue | NSEvent.ModifierFlags.shift.rawValue
override func performKeyEquivalent(with event: NSEvent) -> Bool {
if event.type == NSEvent.EventType.keyDown {
if (event.modifierFlags.rawValue & NSEvent.ModifierFlags.deviceIndependentFlagsMask.rawValue) == commandKey {
switch event.charactersIgnoringModifiers! {
case "x":
if NSApp.sendAction(#selector(NSText.cut(_:)), to:nil, from:self) { return true }
case "c":
if NSApp.sendAction(#selector(NSText.copy(_:)), to:nil, from:self) { return true }
case "v":
if NSApp.sendAction(#selector(NSText.paste(_:)), to:nil, from:self) { return true }
case "z":
if NSApp.sendAction(Selector(("undo:")), to:nil, from:self) { return true }
case "a":
if NSApp.sendAction(#selector(NSResponder.selectAll(_:)), to:nil, from:self) { return true }
default:
break
}
}
else if (event.modifierFlags.rawValue & NSEvent.ModifierFlags.deviceIndependentFlagsMask.rawValue) == commandShiftKey {
if event.charactersIgnoringModifiers == "Z" {
if NSApp.sendAction(Selector(("redo:")), to:nil, from:self) { return true }
}
}
}
return super.performKeyEquivalent(with: event)
}
}
Here's a quick step-by-step guide for swift, based on the excellent answers by @Adrian, Travis B and Thomas Kilian.
The goal will be to subclass the NSApplication, instead of the NSTextField. Once you have created this class, do link it in your "principal Class" setting of the Info.plist, as stated by Adrian. As opposed to the Objective-C folks, we swiftlers will have to add an additional prefix to the principalClass configuration. So, because my Project is called "Foo", I am going to set "Principal Class" to "Foo.MyApplication". You will get an "Class MyApplication not found" runtime error otherwise.
The contents of MyApplication read as follows (copied and adapted from all the answers given so far)
import Cocoa
class MyApplication: NSApplication {
override func sendEvent(event: NSEvent) {
if event.type == NSEventType.KeyDown {
if (event.modifierFlags & NSEventModifierFlags.DeviceIndependentModifierFlagsMask == NSEventModifierFlags.CommandKeyMask) {
switch event.charactersIgnoringModifiers!.lowercaseString {
case "x":
if NSApp.sendAction(Selector("cut:"), to:nil, from:self) { return }
case "c":
if NSApp.sendAction(Selector("copy:"), to:nil, from:self) { return }
case "v":
if NSApp.sendAction(Selector("paste:"), to:nil, from:self) { return }
case "z":
if NSApp.sendAction(Selector("undo:"), to:nil, from:self) { return }
case "a":
if NSApp.sendAction(Selector("selectAll:"), to:nil, from:self) { return }
default:
break
}
}
else if (event.modifierFlags & NSEventModifierFlags.DeviceIndependentModifierFlagsMask == (NSEventModifierFlags.CommandKeyMask | NSEventModifierFlags.ShiftKeyMask)) {
if event.charactersIgnoringModifiers == "Z" {
if NSApp.sendAction(Selector("redo:"), to:nil, from:self) { return }
}
}
}
return super.sendEvent(event)
}
}
我解释了在 XCode 8 / Swift 3 中什么对我有用。
我MyApplication.swift在我的项目文件夹中创建MyApp：
import Foundation
import Cocoa
class MyApplication: NSApplication {
override func sendEvent(_ event: NSEvent) {
if event.type == NSEventType.keyDown {
if (event.modifierFlags.contains(NSEventModifierFlags.command)) {
switch event.charactersIgnoringModifiers!.lowercased() {
case "x":
if NSApp.sendAction(#selector(NSText.cut(_:)), to:nil, from:self) { return }
case "c":
if NSApp.sendAction(#selector(NSText.copy(_:)), to:nil, from:self) { return }
case "v":
if NSApp.sendAction(#selector(NSText.paste(_:)), to:nil, from:self) { return }
case "a":
if NSApp.sendAction(#selector(NSText.selectAll(_:)), to:nil, from:self) { return }
default:
break
}
}
}
return super.sendEvent(event)
}
}
然后将 更改Info.plist Principal class为MyApp.MyApplication。构建并运行以验证我的文本字段和文本视图是否支持Cmd + X、Cmd + C和.Cmd + VCmd + A
根本不需要添加新的类、扩展或任何代码。
这里的好处是这些项目不会对您的用户隐藏，这比创建一个新类并将所有现有的 TextFields 重新分配给它所花费的时间更少。
就在大约 1 小时前，我偶然发现了同样的问题。您无需编写任何代码。我可以在 Interface Builder 中做到这一点：
FirstResponder将'scut:和函数链接copy:到paste:相应的菜单项这对我有用。不幸的是，当您隐藏“编辑”菜单（刚刚尝试过）时，这种（默认）行为似乎不起作用。
根据Thomas Kilian的回答，您实际上可以为 NSTextField 创建一个扩展
let commandKey = NSEvent.ModifierFlags.command.rawValue
let commandShiftKey = NSEvent.ModifierFlags.command.rawValue | NSEvent.ModifierFlags.shift.rawValue
extension NSTextField {
func performEditingKeyEquivalent(with event: NSEvent) -> Bool {
guard event.type == NSEvent.EventType.keyDown else { return false }
if (event.modifierFlags.rawValue & NSEvent.ModifierFlags.deviceIndependentFlagsMask.rawValue) == commandKey {
if let character = event.charactersIgnoringModifiers {
switch character {
case "x":
if NSApp.sendAction(#selector(NSText.cut(_:)), to: nil, from: self) { return true }
case "c":
if NSApp.sendAction(#selector(NSText.copy(_:)), to: nil, from: self) { return true }
case "v":
if NSApp.sendAction(#selector(NSText.paste(_:)), to: nil, from: self) { return true }
case "z":
if NSApp.sendAction(Selector(("undo:")), to: nil, from: self) { return true }
case "a":
if NSApp.sendAction(#selector(NSResponder.selectAll(_:)), to: nil, from: self) { return true }
default:
break
}
}
} else if (event.modifierFlags.rawValue & NSEvent.ModifierFlags.deviceIndependentFlagsMask.rawValue) == commandShiftKey {
if event.charactersIgnoringModifiers == "Z" {
if NSApp.sendAction(Selector(("redo:")), to: nil, from: self) { return true }
}
}
return false
}
}
在以下示例中，实际上可以NSTextField用任何NSTextField继承类（例如NSSearchField）替换NSSecureTextField以具有新功能
class SearchField: NSTextField {
override func performKeyEquivalent(with event: NSEvent) -> Bool {
if performEditingKeyEquivalent(with: event) {
return true
}
return super.performEditingKeyEquivalent(with: event)
}
}
这是 Travis 作为 C# 与 Xamarin.Mac 一起使用的答案：
public override bool PerformKeyEquivalent (AppKit.NSEvent e)
{
if (e.Type == NSEventType.KeyDown) {
var inputKey = e.CharactersIgnoringModifiers.ToLower ();
if ( (e.ModifierFlags & NSEventModifierMask.DeviceIndependentModifierFlagsMask) == NSEventModifierMask.CommandKeyMask
|| (e.ModifierFlags & NSEventModifierMask.DeviceIndependentModifierFlagsMask) == (NSEventModifierMask.CommandKeyMask | NSEventModifierMask.AlphaShiftKeyMask)) {
switch (inputKey) {
case "x":
NSApplication.SharedApplication.SendAction (new Selector ("cut:"), null, this);
return true;
case "c":
NSApplication.SharedApplication.SendAction (new Selector ("copy:"), null, this);
return true;
case "v":
NSApplication.SharedApplication.SendAction (new Selector ("paste:"), null, this);
return true;
case "z":
NSApplication.SharedApplication.SendAction (new Selector ("undo:"), null, this);
return true;
case "a":
NSApplication.SharedApplication.SendAction (new Selector ("selectAll:"), null, this);
return true;
}
} else if ( (e.ModifierFlags & NSEventModifierMask.DeviceIndependentModifierFlagsMask) == (NSEventModifierMask.CommandKeyMask | NSEventModifierMask.ShiftKeyMask)
|| (e.ModifierFlags & NSEventModifierMask.DeviceIndependentModifierFlagsMask) == (NSEventModifierMask.CommandKeyMask | NSEventModifierMask.ShiftKeyMask | NSEventModifierMask.AlphaShiftKeyMask)) {
switch (inputKey) {
case "z":
NSApplication.SharedApplication.SendAction (new Selector ("redo:"), null, this);
return true;
}
}
}
return base.PerformKeyEquivalent(e);
}
感谢您提供此解决方案！它对我帮助很大，所以我决定贡献一些代码，希望它可以帮助别人。上面建议的解决方案在我将其转换为Swift 4.2. 然后我稍微重构了代码。我认为这有点清洁。这是Swift 4.2兼容的：
// NSEventExtensions.swift
import AppKit
extension NSEvent {
func containsKeyModifierFlags(_ flags: NSEvent.ModifierFlags) -> Bool {
switch modifierFlags.intersection(.deviceIndependentFlagsMask) {
case [flags]: return true
default: return false
}
}
}
// SearchFiled.swift
import AppKit
import Carbon
final class SearchField: NSSearchField {
override func performKeyEquivalent(with event: NSEvent) -> Bool {
switch event.type {
case .keyDown: return performKeyDownEquivalent(with: event)
default: return super.performKeyEquivalent(with: event)
}
}
// MARK: - private
private func performKeyDownEquivalent(with event: NSEvent) -> Bool {
if event.containsKeyModifierFlags(.command) {
switch Int(event.keyCode) {
case kVK_ANSI_X: return NSApp.sendAction(#selector(NSText.cut(_:)), to: nil, from: self)
case kVK_ANSI_C: return NSApp.sendAction(#selector(NSText.copy(_:)), to: nil, from: self)
case kVK_ANSI_V: return NSApp.sendAction(#selector(NSText.paste(_:)), to: nil, from: self)
case kVK_ANSI_Z: return NSApp.sendAction(Selector(("undo:")), to: nil, from: self)
case kVK_ANSI_A: return NSApp.sendAction(#selector(NSResponder.selectAll(_:)), to: nil, from: self)
default: break
}
} else if event.containsKeyModifierFlags([.command, .shift]) {
switch Int(event.keyCode) {
case kVK_ANSI_Z: return NSApp.sendAction(Selector(("redo:")), to: nil, from: self)
default: break
}
}
return false
}
}
NSApplication子类的Swift 5解决方案
open override func sendEvent(_ event: NSEvent) {
if event.type == .keyDown {
if event.modifierFlags.contains(.command) && NSEvent.ModifierFlags.deviceIndependentFlagsMask.contains(.command) {
if event.modifierFlags.contains(.shift) && NSEvent.ModifierFlags.deviceIndependentFlagsMask.contains(.shift) {
if event.charactersIgnoringModifiers == "Z" {
if NSApp.sendAction(Selector("redo:"), to:nil, from:self) { return }
}
}
guard let key = event.charactersIgnoringModifiers else { return super.sendEvent(event) }
switch key {
case "x":
if NSApp.sendAction(Selector("cut:"), to:nil, from:self) { return }
case "c":
if NSApp.sendAction(Selector("copy:"), to:nil, from:self) { return }
case "v":
if NSApp.sendAction(Selector("paste:"), to:nil, from:self) { return }
case "z":
if NSApp.sendAction(Selector("undo:"), to:nil, from:self) { return }
case "a":
if NSApp.sendAction(Selector("selectAll:"), to:nil, from:self) { return }
default:
break
}
}
}
super.sendEvent(event)
}
Adrian 的解决方案很好，但我认为使用 switch 语句而不是所有那些字符串比较更好，例如：
uint const modifierCode = (theEvent.modifierFlags & NSDeviceIndependentModifierFlagsMask);
BOOL usingModifiers = ( modifierCode != 0 );
//BOOL const usingShiftKey = ((theEvent.modifierFlags & NSShiftKeyMask) != 0);
//BOOL const usingCommandKey = ((theEvent.modifierFlags & NSCommandKeyMask) != 0);
NSString * ch = [theEvent charactersIgnoringModifiers];
if ( ( usingModifiers ) && ( ch.length == 1 ) ) switch ( [ch characterAtIndex:0] )
{
case 'x':
if ( modifierCode == NSCommandKeyMask ) [m cut]; // <-- m = model
break;
case 'c':
if ( modifierCode == NSCommandKeyMask ) [m copy];
break;
case 'v':
if ( modifierCode == NSCommandKeyMask ) [m paste];
break;
case 'z':
if ( modifierCode == NSCommandKeyMask ) [m undo];
break;
case 'Z':
if ( modifierCode == ( NSCommandKeyMask | NSShiftKeyMask ) ) [m redo];
break;
default: // etc.
break;
}
else switch ( theEvent.keyCode ) // <-- for independent keycodes!
{
case kVK_Home:
[m moveToBeginningOfDocument:nil];
break;
case kVK_End: // etc!