First off, sorry if this is a duplicated question but after reading several posts with similar issue, I wasn’t able to find a clear solution.
The problem is what the title states: I have a pretty basic tableview, with only one section and a tableheader. When I delete one row, the table header also gets swiped to the left at the same time with the row being deleted.
I guess the solution is to return false in canEditRowAtIndexPath when I know it is the header calling, but I don’t know how to differentiate it from the rest of rows.
I tried tableView.cellForRowAtIndexPath but didn’t work, I guess it is because the header cell is not really part of the tableview as the normal cells are. In fact, I don’t know how to get the indexPath of my header cell. I also thought about tagging the header cell but, again, I don’t know how to get it back in canEditRowAtIndexPath.
Many thanks in advance!!
This may happen if you are using an UITableViewCell instead of an UIView in viewForHeaderInSection method. Please verify it.
If you have only one section and you don't really need a sticky header, you could also add the UIView to the tableView.tableViewHeader property. Please check https://stackoverflow.com/a/5442005/3211512 for an example.
I think, allo86 is right. Your header may be a UITableViewCell. However, I would suggest a little different approach. If you are having only one section then set an UIView on top of your Table view(outside of the table) but if you are going to have multiple sections, then set UIViews as headers accordingly for any section for which you want to have a header.
Related
I have a UITableView which has a variable amount of sections and every section has a variable amount of rows. Every section contains a section header, a section footer and the rows for that section. They are shown and displayed inside a container. Everything up until now works as expected. To demonstrate what my UITableView currently looks like:
I am now trying to implement the possibility to swipe left on the entire section, so that the header of the section, the rows inside this section and the footer of this section move to the left and display another UIView. I am capable of swiping the cells separately, but enabling this feature on the entire sections have caused headaches for the past two days. This is what I would like to achieve:
I have thought about implementing UIGestureRecognizers but I am afraid they might conflict with my UITableView. Also, I started implementing it, but I would not know how to move solely the section on which was swiped to the left.
Then I thought I could maybe implement a UIScrollView as container for each section. How I would accomplish this is still a mystery to me, but it seems like a possible solution if this could be done.
Furthermore I am out of ideas and stuck on how this should be done. It's something I have not found on the Internet so far - at least no working examples of some kind so I have zero inspiration on how to achieve the effect.
I therefor would like to ask if somebody has an idea of how this could work and what I have to keep in mind when implementing this. Every clue pointing me towards a working solution is gratefully appreciated!
EDIT: I have already seen the possible duplicate this afternoon. However, the suggestion there shows touchesBegan() on the header, which does not work in my case as I need the entire section to be "draggable".
I think one way you can implement this is with a vertical stackview containing views that contains a tableview and the trash icon. When a user swipes left on the tableview header, it will show the hidden trash icon in the view. I would think that each tableview only has one section so it will be easier to keep track of which "section" the user has swiped.
I have currently managed to arrange a similar solution. I take the rectangle of the section with rect(forSection:int), add a UIPanGestureRecognizer in which I add a UIView on top of the UITableView if touches began, I calculate the location of the finger and let the cudtom UIView follow. When a certain point (100 from left edge of the UITableView) is reached, the section gets removed with deleteSections(indexSet:with:).
This works. It does the job, but it adds an overlay to the section rather than pushing it to the left.
Therefor I am asking of someone knows if there is any way of setting the offset for one specific section or for an area of a UIView, so I can offset the rectangle of the section. I have been able to setContentOffset on the entire UITableView but this is not the desired result.
If there is no way to do this, I would consider keeping the solution I have now or maybe implement a snapshot feature which takes a screenshot and crops the rect of the frame, adding this UIImage to the custom view to simulate the section. But that would be tricky. Any ideas for this idea are also welcome.
I am just thinking. Suppose, i have a tableview which have custom cell. It's simple. But My idea is that, when i click a tableview cell then another tableview is appear under that tableview cell, and again i click that cell then that sub tableview disappear. Similarly when i click second cell than work same. Is it possible? Please Provide me any idea or reference.
This is entirely possible, you're talking about Expandable cells.
My example here
The general idea is that your custom cell has a tableview at the bottom of the cell, and what you do is just change the cell height to display said tableview, on tap.
It's not easy, I'm not gonna lie it took us a while to do it, but we managed, and I'm telling you, it's very possible.
You can find a lot of help using the Expandable Cell keywords.
Note that you're gonna find yourself handling a lot :
What to do when the expanding cells is shown off screen?
What to do when you're expanding the first/last cells ?
What to do when expanding another cell ?
What to do when scrolling inside that cell (a scrollview inside a scrollview !)
There are many cases where it'll work, but won't work fine, and there is gonna be a lot of fine tuning. Specially in our case where we have rounded corners, but only when the cell is expanded, and not in cases where it's the last or first cell (next to section header).
They look cool and make you feel proud, but don't say to your PM it'll be done in a week, because it's a pain to build.
If you want to show additional cell information, you can add more cells after the cell indexpath you have clicked.
Create a custom table view cell classCustomTableViewCell by subclassingUITableViewCell class. And system will generate CustomTableViewCell.h, CustomTableViewCell.m, CustomTableViewCell.xib files for you.
Add protocols UITableViewDataSource and UITableViewDelegate in your CustomTableViewCell.h and implement the required methods in CustomTableViewCell.m files
Add a method for setting datasource and use the datasource for updating the table.
NOTE:
Handle table-dequeue mechanism properly, otherwise you will end up
with weird issues that may take time to investigate and resolve.
If you use this custom cell for all the cells in your parent table then the gestures will only listened by the child table. So plan for that too.
Please visit my blog for the sample code. https://myioslearnings.blogspot.in/2017/03/nested-table-view-in-ios-objective-c.html
I am building an app that uses a side menu, within that side menu is a UITableView displaying some text. When you click on one of those, it takes you to another ViewController. I searched the internet for it but didn't find something useful. My question is: how to make a "submenu" inside the tableview, so that when you click on it, it needs to dropdown and show more options.
I don't have any idea how to do this, so a little help would be really appreciated!
Thanks
You may use sections for building a submenu structure. You can overwrite viewForHeaderInSection for each section for which you don't want to display the section header and return an empty UIView object with a size of (0.0, 0.0) or even null. (I never tried returning null/nil myself.)
For each menu on the highest level you have exactly one corresponding section and each of them has just one row. They may or may not have header views.
For the menu that you want to display as submenu you set the header view of the related section accordingly and then have one row for each item of the submenu.
Unfortunately this allows for a 2-level menu heirachry only. But on the upside everything you need is already sort of build-in into cocoa touch.
Perhaps this could possibly help you achieve what you are looking for:
Expandable Sections UITableView IndexPath SWIFT
You may have to have a good look through the code but it should set you on the right track.
I've been searching a ton and can not seem to find an answer...
I have a tableView which scrolls all the days of all the months. And I have a titleForHeaderInSection: and viewForHeaderInSection: which displays a section header at the top of each month-section which replaces appropriately at the top, cool. But how can I create a single header where the titleLabel changes to the proper month as I scroll (in other words, Not have multiple section headers, just one)?
I can't tell whether this should be setup as "one (big) section with a header that changes" or "a headerView that changes", or whatever... Any examples would be greatly appreciated. Thank you in advance.
You can create a static view and place it above your tableView. Then you can use the visibleCells property to determine which cells are visible. When those cells change to the cells of a new section you can update the static view that is above the UITableView.
Once you are the delegate of the UITableView you are also the delegate of the UIScrollView it is built on.
So you can catch the scrollViewDidScroll: delegate call and update your header there.
So to lay it out:
1.) Create a Header View above your UITableView
2.) Become the delegate of the UITableView
3.) Implement the scrollViewDidScroll: method to detect scrolls
4.) Inside the scrollViewDidScroll method use the visibleCells property of the UITableView to determine which cells are being shown and to update your header view appropriately.
I've never done anything like this, but I don't see why it wouldn't work.
EDIT: As Husker Jeff pointed out. It is probably easier to use indexPathsForVisibleRows to determine what is on screen. You can then use that fairly easily to determine which section/sections are being displayed. Thanks Jeff!
When editing my UITableView, I give the option to move cells to reorder the data. However, The top two cells in the table are cells that give information about all of the cells in the table, and I dont want the user to be able to move information cells into that section. Here is a picture of the problem:
The user shouldn't be able to drag the cell titled 'This is bad!!!' into the section with the 'Total:' and 'New Group...' cells. Is there a way to control this functionality? I haven't seen a delegate method that does this, but I could have missed one.
Edit: oops! I just saw that someone else has asked the same question on SO, so I'm going to post the link and close this question. Thanks #fzwo for your help.
How to limit UITableView row reordering to a section
tableView:targetIndexPathForMoveFromRowAtIndexPath:toProposedIndexPath: from UITableViewDelegate is what you're looking for.
In your concrete case, you could also display the header information in the actual tableView.tableHeaderView. This scrolls like an ordinary cell, but isn't a cell. It would probably also make sense from a UI perspective, because it is something different than your ordinary cell content.