- （void）keyDown：（NSEvent *）事件不工作 [英] - (void) keyDown: (NSEvent *) event does not work

问题描述

下面是示例代码。

- (void) keyDown: (NSEvent *) event
{
    NSString *chars = [event characters];
    unichar character = [chars characterAtIndex: 0];

    if (character == 27) {
        NSLog (@"ESCAPE!");
    }
} 

我需要在InterfaceBuilder中设置任何委托有点绑定？

Should I need to set any delegate in InterfaceBuilder or any kinda binding??

帮助欣赏...

推荐答案

keyDown 需要在其对象被设置为第一个响应者的 NSView 子类中重写。响应者链应该传递该事件，但要确保您获得它，请确保您的对象是第一个响应者。

keyDown needs to be overridden in an NSView subclass whose object is set as first responder. The responder chain should pass down the event, but to be sure you get it, make sure that your object is first responder.

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