NSMenu 不开始跟踪
我有一个小可可应用程序，通常在后台运行（作为代理）。有时我希望能够弹出一个上下文菜单（此时没有窗口或其他可见的东西）。
因为我只针对雪豹，所以我尝试了以下操作：
if (windows) {
NSMenu *theMenu = [[[NSMenu alloc] initWithTitle:@"test"] autorelease];
[theMenu setShowsStateColumn:NO];
[theMenu setAutoenablesItems:NO];
for (id item in windows) {
NSString *labelText = @"some text";
NSMenuItem *theMenuItem = [[[NSMenuItem alloc] initWithTitle:labelText
action:@selector(menuItemSelected:)
keyEquivalent:@""] autorelease];
[theMenuItem setTarget:self];
[theMenuItem setRepresentedObject:item];
[theMenuItem setEnabled:YES];
[theMenuItem setImage:icon];
[theMenu addItem:theMenuItem];
}
[theMenu popUpMenuPositioningItem:nil atLocation:[NSEvent mouseLocation] inView:nil];
}
菜单完美弹出，但如果我用鼠标光标悬停这些项目，它们不会突出显示，我也无法单击它们。
menuItemSelected: 方法看起来像这样：
-(IBAction)menuItemSelected:(id)sender {
}
知道我做错了什么吗？
I have a little cocoa app which usually operates in the background (as agent). Sometimes I'd like to be able to popup a contextmenu (no window or s.th. visible at this time).
As I'm only targetting Snow Leopard I tried this:
if (windows) {
NSMenu *theMenu = [[[NSMenu alloc] initWithTitle:@"test"] autorelease];
[theMenu setShowsStateColumn:NO];
[theMenu setAutoenablesItems:NO];
for (id item in windows) {
NSString *labelText = @"some text";
NSMenuItem *theMenuItem = [[[NSMenuItem alloc] initWithTitle:labelText
action:@selector(menuItemSelected:)
keyEquivalent:@""] autorelease];
[theMenuItem setTarget:self];
[theMenuItem setRepresentedObject:item];
[theMenuItem setEnabled:YES];
[theMenuItem setImage:icon];
[theMenu addItem:theMenuItem];
}
[theMenu popUpMenuPositioningItem:nil atLocation:[NSEvent mouseLocation] inView:nil];
}
The menu popsup perfectly but if I hover the items with the mouse cursor they don't highlight and I can't click them.
The menuItemSelected: method looks just like this:
-(IBAction)menuItemSelected:(id)sender {
}
Any idea what I'm doing wrong?
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我怀疑窗口系统不认为您的应用程序处于活动状态，因此不会将鼠标事件发送到您创建的菜单。
作为实验，尝试在弹出菜单之前创建一个虚拟窗口。我将创建一个 NSPanel，可能使用样式 NSNonActivatingPanelMask。
makeKeyAndOrderFront：你的窗口/面板，然后弹出菜单，看看会发生什么。如果这有效，我会坚持这种方法并隐藏窗口。
I suspect that the windowing system doesn't consider your application to be active, and thus doesn't send mouse events to the menu you've created.
As an experiment, try creating a dummy window before popping up the menu. I'd create an
NSPanel, possibly with styleNSNonActivatingPanelMask.makeKeyAndOrderFront:your window/panel, then pop up the menu and see what happens.If this works, I'd stick with the approach and hide the window.