首先就是创建
- (void)deleteBtnAction:(UIButton *)deleteBtn
{
[self becomeFirstResponder];// 用于UIMenuController显示，缺一不可
UIMenuController *menu = [UIMenuController sharedMenuController];
UIMenuItem *item1 = [[UIMenuItem alloc] initWithTitle:@"撤销" action:@selector(revokeAction)];
UIMenuItem *item2 = [[UIMenuItem alloc] initWithTitle:@"确认" action:@selector(sureAction)];
menu.menuItems = @[item1, item2];
menu.arrowDirection = UIMenuControllerArrowUp;
[menu setTargetRect:deleteBtn.frame inView:deleteBtn.superview];// [menu setTargetRect:所点击的按钮Frame inView:按钮的父视图];
[menu setMenuVisible:YES animated:YES];
}
用于UIMenuController显示，不可缺少的方法
-(BOOL)canBecomeFirstResponder{
return YES;
}
-(BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
if (action == @selector(revokeAction)) {
return YES;
}
if (action == @selector(sureAction)) {
return YES;
}
return NO;//隐藏系统默认的菜单项
}
我们可以获取UIMenuController的通知，从而做出相应的操作
//UIMenuControllerWillShowMenuNotification == 将要显示
//UIMenuControllerDidShowMenuNotification === 已经显示
//UIMenuControllerWillHideMenuNotification == 将要隐藏
//UIMenuControllerDidHideMenuNotification == 已经隐藏
//UIMenuControllerMenuFrameDidChangeNotification == 位置大小改变
//UIMenuController已经隐藏的通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(menuControllerDidHide) name:UIMenuControllerDidHideMenuNotification object:nil];
//通知回调的方法
- (void)menuControllerDidHide
{
//可以做相应的操作
}
效果图如下
11)效果图.jpg
