从UITableViewCell中的详细信息披露按钮显示UIPopoverController

Question

我正在为iPad创建一个应用程序，我希望显示一个UIPopoverController，其箭头指向它所属行的详细信息披露按钮。我想在tableView:accessoryButtonTappedForRowWithIndexPath:方法中执行此操作。目前我有这个，有一个虚拟CGRect：

- (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath {
    // Dismiss in the case it shows itself somewhere else
    [addFeedPopup dismissPopoverAnimated:YES];

    // Set up
    TNSubscribeToFeedController *subscribeToFeedController = [[TNSubscribeToFeedController alloc] initWithNibName:@"SubscribeToFeed" bundle:nil];
    UINavigationController *subscribeToFeedNavigationController = [[UINavigationController alloc] initWithRootViewController:subscribeToFeedController];
    subscribeToFeedController.title = @"Subscribe to feed";
    subscribeToFeedController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:nil];
    subscribeToFeedController.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:nil];
    /*
     * Note that we use the UINavigationController pure for the nices UINavigationBar.
     */

    // Show in popup
    addFeedPopup = [[UIPopoverController alloc] initWithContentViewController:subscribeToFeedNavigationController];
    addFeedPopup.popoverContentSize = CGSizeMake(480, 320);
    [addFeedPopup presentPopoverFromRect:CGRectMake(0, 0, 20, 20) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionLeft animated:YES];

    // Memory
    [subscribeToFeedNavigationController release];
    [subscribeToFeedController release];
}

此外，当UITableView处于编辑模式时，详细信息显示按钮位于左侧约60个像素，因为我使用它来设置我的行：

if (cell == nil) {
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"SectionTwoCell"] autorelease];
}
cell.textLabel.text = [NSString stringWithFormat:@"Feed %d", indexPath.row];
cell.detailTextLabel.text = @"Description";
cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;
cell.editingAccessoryType = cell.accessoryType;
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^//
//        TWO LINES BACK DEAR SO USER        //

任何人都可以帮我解决这个问题吗？感谢。

---

哦，是否也可以禁用滚动并禁用选择任何内容，直到UIPopoverController关闭（完美主义）？

Answer 1

要做你想做的事，你需要一个accessoryView并设置accessoryType不会创建一个。但是，如果您创建一个按钮并将其设置为cell.accessoryView。

，它将起作用

创建单元格时创建并设置accessoryView：

    ...
    UIButton *disclosureButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
    [disclosureButton addTarget:self action:@selector(discloseDetails:) forControlEvents:UIControlEventTouchUpInside];
    cell.accessoryView = disclosureButton;
    ...

使用disclosureDetails：替换tableView：accessoryButtonTappedForRowWithIndexPath：。这看起来很像你之前所拥有的，所以我只做下面的改动：

- (void) discloseDetails:(UIButton *)sender {
    ...
    UITableViewCell *cell = (UITableViewCell *) sender.superview;
    NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];  // if needed
    [addFeedPopup presentPopoverFromRect:cell.accessoryView.bounds inView:cell.accessoryView permittedArrowDirections:UIPopoverArrowDirectionLeft animated:YES];
    ...
}

如果您不需要单元格，可以使其更简单：

- (void) discloseDetails:(UIButton *)sender {
    ...
    [addFeedPopup presentPopoverFromRect:sender.bounds inView:sender permittedArrowDirections:UIPopoverArrowDirectionLeft animated:YES];
    ...
}

这就是它的样子