Recently I've been using Google's Inbox app, and I found the swipe to mark done/snooze feature very concise and useful. Since I have an app with a similar tableview interface in the works, I've been looking around for ways to implement this in iOS, but I haven't found anything. The closest I've gotten is swiping to reveal extra actions (as seen in the iOS Mail app), but that entails having to both swipe and click on a button, which is rather unwieldy. Is there a way to bundle an action into the swipe itself, instead of having it reveal some buttons?
You may be able to achieve that by implementing the method
func tableView(_ tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool
in your delegate, respond with false and perform the feature when the function is called
Related
I have a UITableView with cells that I want the user to be able to reorder by dragging them up & down, using the "handles" on the right side of each cell. I do NOT want to implement "drag & drop" functionality, because the data behind these cells makes no sense outside of this table (and implementing NSItemProvider looks to be an ugly process, given the data behind the table view & its cells). So far, everything is implemented & works fine. Looks somewhat like the results of this article.
The next step is, I'd like to know when the user has "lifted" or started to move a cell -- similar to the dragStateDidChange ability when one IS using drag & drop. I want to get this notification even before the cell has been moved out of its place -- as the UI turns the cell background white & "raises" it above the table.
How can I get this notification, without implementing "drag & drop"?
Things I've tried that don't accomplish what I want:
Recognizing a long-press gesture: I do use Gesture Recognizers on these cells for taps & such; it seems that when the user touches the drag handles to reorder the cells, this action does NOT fire a long-press Gesture. Tried that, no success.
Will-select-row-at: I implement the function func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath? within the UITableViewDelegate code; it isn't called when the user touches the drag handles.
targetIndexPathForMoveFromRowAt: The func func tableView(_ tableView: UITableView, targetIndexPathForMoveFromRowAt sourceIndexPath: IndexPath, toProposedIndexPath proposedDestinationIndexPath: IndexPath) -> IndexPath fires when the dragged cell changes position, but not until then; it does NOT catch the start of the lift/drag process that I'm looking for.
Likewise, willBeginEditingRowAt and shouldHighlightRowAt aren't called either.
Various scrollView functions: they all get called when the user is scrolling the whole table, not when the user is reordering it.
Watching for "set editing": the drag handles need to always be present, so "editing" is always set to true.
Somewhat similar question, unfortunately without an answer that I can use (and also not in Swift).
I suspect that there must be a simple notification that the cell has been lifted and is being dragged using the handles, even if it hasn't been moved far enough to be above or below its old place yet. After all, the OS "knows" about this because it changes the background and adds shadows & so forth. Any help accessing that notification so that other code can respond to it as well would be most appreciated!
It's a little strange that these are not documented, but you can define the following functions in your UITableViewController (or in the UITableViewDelegate) which will be called when cell dragging starts or ends, respectively:
#objc func tableView(_ tableView: UITableView, willBeginReorderingRowAtIndexPath indexPath: IndexPath) {
// Dragging started
}
#objc func tableView(_ tableView: UITableView, didEndReorderingRowAtIndexPath indexPath: IndexPath) {
// Dragging ended
}
I've implemented swipe to delete in UITableView a lot of times before, but never faced this problem before. In my last app delete button sometimes (not always) doesn't shift cell's content, but just overlaps it. See attached screenshot.
I use standard iOS functionality for this:
func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
Probably, somebody already faced with this issue and know how to fix it?
I use for my app UITableview and I got a problem.
Method tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) called only by sliding finger from left to right or from right to left the item. But when I do normal click by this item, this method doesn't called
What is supposed to do the cell when you click on it?. As a first impression, the line tableView.deselectRowAtIndexPath(indexPath, animated: false) is not animating the select of the cell, and that can cause the impression that nothing is happening.
Second, the implementation of the cellForRowAtIndexPath: and didSelectRowAtIndexPath: methods look almost the same. I mean, in both methods your are getting the same data from the categories array and not changing anything, at least that's what I can see with the code you provided.
Third, may the implementation of the code inside your subclass, to which item belongs to in let item = categories[indexPath.row], be wrong.
Fourth, why your code have semicolons?.
You can review all of these to start discarding.
My app is essentially a UITableView of UITableViews. But when I click on a cell, nothing happens for some reason. The cell just gets grayed out. I'm unsure why this happens. I've spent the last 2 hours trying to figure it out but I just can't find the problem.
My appologies if this turns out to be such a silly problem. I'm new to iOS development.
The full project can be found here: https://drive.google.com/open?id=0B1GgS8Pwx4SBZjg3YjduejBPemc
I reckon the files which are relevant are
Main.storyboard
MasterViewController.swift
IntermediateViewController.swift
A little description: The app is meant to save your favorite twitter search queries. Essentially, each tag maps to a certain query. When you click on a tag, you get a UITableView of tweets returned by searching twitter API with that query. I haven't yet defined what happens when you click on a tweet, but a double click brings up a UIAlertController so that you can reply to that tweet. A long press follows that user.
None of this is relevant, though. The problem is in the UITableView to UITableView transition thats triggered when you click on a cell.
Places of interest:
MasterViewController.swift:
prepareForSegue()
Callback methods
Main.Storyboard:
Segues and structure
Any help would be appreciated. I've stretched myself out trying to figure out what's the problem. Please describe the problem when you see it.
Thanks
You should perform a segue when a cell is selected. In your tableView controller in the following method:
func tableView(_ tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
create and present the other view controller using :
self.presentViewController(_ viewControllerToPresent: UIViewController,
animated flag: Bool,
completion completion: (() -> Void)?)
And if you've created the segue in the storyboard, you should set the segue identifier in the Storyboard to "showDetail" as indicated in prepareForSegue in MasterViewController.swift
I have a UITableView with prototype cells. If you swipe any cell to their left, two options are displayed on the cell correctly. This has been done with
override func tableView(tableView: UITableView, editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [AnyObject]?
Now, I want to also allow users to delete a cell. I understand the best way would be to make a complete on a cell swipe in order to remove it. This means, if there swipe is not complete, options will be displayed (as it is done now), but if the swipe is complete, the cell would be removed.
What code should I add to keep the actual behavior, but also enable to remove a cell by swiping it completely?
This repo has what you want. Have a look.
https://github.com/MortimerGoro/MGSwipeTableCell