Skip to main content

insertSubview:belowSubview: in UITableViews



I have a UITableView with UITableViewCell s that are swipable. When a cell is swiped, I want a view to be visible (revealed) underneath that cell. Here's the code that I have:







UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];



_cellBack = [[UIView alloc] initWithFrame:CGRectMake(0, cell.frame.origin.y, cell.frame.size.width, cell.frame.size.height)];

_cellBack.backgroundColor = [UIColor whiteColor];

[self.tableView insertSubview:_cellBack belowSubview:cell];



for (int i = 0; i < [self.tableView subviews].count; i++) {

UIView *v = [[self.tableView subviews] objectAtIndex:i];



if ([v isEqual:_cellBack]) {

NSLog(@"cellBack %d", i);

}

if ([v isEqual:cell]) {

NSLog(@"cell %d", i);

}

}







In the for loop, I check to see if the views' indexes are as I expect, and indeed they are; _cellBack has an index that is one less than cell 's index.





When I replace the insertSubview:belowSubview: call with insertSubview:aboveSubview: , it works fine (albeit with the white UIView showing up above the swiped cell), so it's not a matter of not allocating _cellBack properly. I've also tried insertSubview:atIndex: and that didn't work either..





What could be causing this?





Thanks!


Comments

  1. UITableView's already have the ability to put things behind cells. It's the backgroundView of the cell. Why don't you try that instead so you would do the following:

    cell.selectedBackgroundView = _cellBack;

    ReplyDelete
  2. So it turns out that, if I add it to another view, the code works as expected.

    Here's where I added it:

    _cellBack = [[UIView alloc] initWithFrame:CGRectMake(0, cell.contentView.frame.origin.y, cell.frame.size.width, cell.frame.size.height)];
    _cellBack.backgroundColor = [UIColor whiteColor];

    [cell insertSubview:_cellBack belowSubview:cell.contentView];


    I'm still not sure why the code in the question doesn't work. The SideSwipeTableView from this github account has code similar to what I had before and it works fine.

    ReplyDelete

Post a Comment

Popular posts from this blog

Slow Android emulator

I have a 2.67 GHz Celeron processor, 1.21 GB of RAM on a x86 Windows XP Professional machine. My understanding is that the Android emulator should start fairly quickly on such a machine, but for me it does not. I have followed all instructions in setting up the IDE, SDKs, JDKs and such and have had some success in staring the emulator quickly but is very particulary. How can I, if possible, fix this problem?

CCNA 3 Final Exam => latest version

1 . Which security protocol or measure would provide the greatest protection for a wireless LAN? WPA2 cloaking SSIDs shared WEP key MAC address filtering   2 . Refer to the exhibit. All trunk links are operational and all VLANs are allowed on all trunk links. An ARP request is sent by computer 5. Which device or devices will receive this message? only computer 4 computer 3 and RTR-A computer 4 and RTR-A computer 1, computer 2, computer 4, and RTR-A computer 1, computer 2, computer 3, computer 4, and RTR-A all of the computers and the router   3 . Refer to the exhibit. Hosts A and B, connected to hub HB1, attempt to transmit a frame at the same time but a collision occurs. Which hosts will receive the collision jamming signal? only hosts A and B only hosts A, B, and C only hosts A, B, C, and D only hosts A, B, C, and E   4 . Refer to the exhibit. Router RA receives a packet with a source address of 192.168.1.65 and a destination address of 192.168.1.161...