NSSearchField结果菜单

Question

我一直在寻找几个小时,但仍然没有找到答案.如何NSSearchField显示带有结果的菜单？我可以使用最近的搜索菜单来显示结果,但如何以编程方式显示菜单？谢谢你的帮助.

Answer 1

我相信Apple通过一些私有方法来做到这一点.也许它使用的是NSWindow而不是NSMenu.一种方法是在你的NSSearchField委托中实现这个,假设你有一个IBOutlet指向NSSearchField.

- (void)controlTextDidEndEditing: (NSNotification *)aNotification
{
    NSString *searchString = [searchField stringValue];

    NSMenu *menu = [[NSMenu alloc] initWithTitle: @"results"];

    [menu addItemWithTitle: searchString action: @selector(someAction:) keyEquivalent: @""];
    [menu addItemWithTitle: @"someString" action: @selector(someOtherAction:) keyEquivalent: @""];

    NSEvent *event =  [NSEvent otherEventWithType: NSApplicationDefined
                                         location: [searchField frame].origin
                                    modifierFlags: 0
                                        timestamp: 0
                                     windowNumber: [[searchField window] windowNumber]
                                          context: [[searchField window] graphicsContext]
                                          subtype: NSApplicationDefined
                                            data1: 0
                                            data2: 0];

    [NSMenu popUpContextMenu: [menu autorelease] withEvent: event forView: searchField];
}

请注意,显示菜单会阻止进一步输入NSSearchField.这就是为什么我使用controlTextDidEndEditing:而不是controlTextDidChange:.您还应该检查NSEvent的类参考以获得更多自定义事件.