Question

当你长按我的应用程序中的项目时，会弹出UIMenuController并给我一些选项。其中一个是删除。

以下是一个示例：

- (void)messageCellDidLongPress:(FCIMessageCell *)cell
{
self.cellShowingMenuController = cell;
[self becomeFirstResponder];
self.messageMenuController               = [UIMenuController sharedMenuController];
self.messageMenuController.anchorView    = cell.bodyLabel;
self.messageMenuController.presentInView = cell;
[self.messageMenuController updatePosition];
UIMenuItem *editMenuItem   = [[UIMenuItem alloc] initWithTitle:@"Edit" action:@selector(edit:)];
UIMenuItem *unsendMenuItem = [[UIMenuItem alloc] initWithTitle:@"Unsend" action:@selector(unsend:)];
UIMenuItem *infoMenuItem   = [[UIMenuItem alloc] initWithTitle:@"Details" action:@selector(info:)];
self.messageMenuController.menuItems = @[unsendMenuItem, editMenuItem, infoMenuItem];
[self.messageMenuController setMenuVisible:YES animated:YES];
//Delete button doesn't appear because its set up to appear on conditions
}

我想做什么：一旦有人按下删除按钮，会出现“确认”或“取消”选项，可能使用UIActionSheet。我不太清楚该怎么做。我会把代码放在哪里让它出现。我不确定是否需要创建一个完整的其他视图，或者是什么？

Answer 1

在.h

@interface MyViewController : UIViewController <UIActionSheetDelegate>

在.m

-(IBAction) edit:(id)sender
{
    self.editSheet = [[UIActionSheet alloc] initWithTitle:nil
        delegate:self
        cancelButtonTitle:@"cancel"
        destructiveButtonTitle:@"delete"
        otherButtonTitles:nil];
    [self.editSheet showFromBarButtonItem:sender animated:YES];
}

以及稍后，在.m

- (void)actionSheet:(UIActionSheet *)actionSheet
    clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (self.editSheet == actionSheet) {

    if((actionSheet.cancelButtonIndex) == buttonIndex) {
            // Cancel, do nothing
    } // etc.
}

还有一点，如果它已经存在，就像没有创建一张纸一样，可能会处理iPhone和iPad。 iPad不同等等。

使用UIActionSheet添加删除确认

1 个答案: