NSMenuItem的选择器放在哪里 [英] Where to put selector of NSMenuItem

问题描述

我尝试了解可可粉中的几件事，但我被一件事困住了.我正在追踪简约可可编程，它是NSMenuItem负责终止应用程序.现在，我想创建另一个带有快捷方式的NSMenuItem，当按下它时，它会NSLog -s.但是我不知道该把选择器的实现放在哪里?我应该将整个NSApplication子类化吗?我应该setDelegate到某个NSObject实例，充当控制器吗?

I try to understand a few things in Cocoa but I got stuck on one thing. I'm following Minimalistic Cocoa Programming, there it is a NSMenuItem responsible for terminating the app. Now, I would like to create another NSMenuItem, with a shortcut, that when pressed, it NSLog-s something. But I don't know where should I put the implementation of said selector? Should I subclass the whole NSApplication? Should I setDelegate to some NSObject instance, acting as a controller?

推荐答案

您需要创建一个可用作菜单项目标的类.像这样:

You need to create a class that can be used as the target of the menu item. Something like this:

@interface Tester : NSObject
@end
@implementation Tester
- (void)logTest:(id)sender
{
    NSLog(@"Test");
}
@end

然后将其设置为目标:

id testMenuItem = [[[NSMenuItem alloc] initWithTitle:@"Log Test" action:@selector(logTest:) keyEquivalent:@"l"] autorelease];
id tester = [[[Tester alloc] init] autorelease];
[testMenuItem setTarget:tester];

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