如何定义一个像 NSButton 这样发送动作的类？
在 Cocoa 中，如何定义发送操作的类？我希望能够以 NSButton 的风格将操作连接到 IB 中另一个对象的选择器。如果可能的话，我不想继承 NSControl 的子类。
In Cocoa, how do you define a class that sends an action? I want to be able to connect the action to the selector of another object in IB in the style of NSButton. I would prefer not to subclass NSControl if possible.
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id。我不确定这是否应该保留；我会说不，因为目标通常是拥有（间接）拥有视图的窗口的控制器。SEL的属性（最好是非正式的），用于操作。accessibilityPerformAction:来响应mouseUp:和keyDown:（检查相关按键是否为空格键或 Return 或 Enter）消息，传递NSAccessibilityPressAction。accessibilityPerformAction:消息，方法是将操作消息发送到目标 (NSAccessibilityPressAction) 或调用super（其他），如该方法的文档中所述。您还应该实现 NSAccessibility 协议的其余部分< /a> 当你在做的时候。结合使用辅助功能检查器和 VoiceOver 来测试其工作情况。
id, for the target. I'm not sure whether this should retain or not; I'd say no, since the target will normally be the controller that owns the window that (indirectly) owns the view.SEL, for the action.mouseUp:andkeyDown:(checking that the key in question is the space bar or return or enter) by sending yourself anaccessibilityPerformAction:message, passingNSAccessibilityPressAction.accessibilityPerformAction:message by either sending your action message to your target (NSAccessibilityPressAction) or calling up tosuper(other), as described in the documentation for that method.You should also implement the rest of the NSAccessibility protocol while you're at it. Test that work with a mix of the Accessibility Inspector and VoiceOver.