解决方法
那是UIMenuController.我不善于迅速.对于Swift,请查看
this链接. Objective C代码如下：
- (void)showMenu
{
UIMenuController *menu = [UIMenuController sharedMenuController];
menu.menuItems = @[
[[UIMenuItem alloc] initWithTitle:@"Title1" action:@selector(MyAction1)],[[UIMenuItem alloc] initWithTitle:@"Title2" action:@selector(MyAction2)],[[UIMenuItem alloc] initWithTitle:@"Title3" action:@selector(MyAction)]];
[menu setTargetRect:self.bounds inView:self];
[menu setMenuVisible:YES animated:YES];
}