UITableView - how do I close row actions? - uitableview

I've implemented tableView:editActionsForRowAtIndexPath:. In response to some of these actions, i want to snap the row action area back closed.
There doesn't seem to be an appropriate method on UITableViewRowAction. I've tried endEditing on both the table and table cell; I'm not sure what to try next.
How do I do snap the action area closed?


To close the edit actions you can either set the tableViews edit state:
tableView.editing = NO
or set it with animation:
[tableView setEditing:NO animated:YES]


Update for Swift 3
I've been looking for a way to do this using Swift 3, and I finally found it:
tableView.isEditing = false


If you do self.tableView.setEditing(false, animated: true), the user will be brought out of editing mode. I think what you want is you want to stay in editing mode but just dismissing the row action. So you can use the following code:
self.tableView.cellForRow(at: cellIndex)?.setEditing(false, animated: true)
self.tableView.reloadData() // this is necessary, otherwise, it won't animate

Related

UISegmentedControl Set Selected Index Without Animation

I have a UITabBarController with 3 views. Each view has a UISegmentedControl in its navigation bar, and all of these segmented controls need to remain in sync. Each time the selectedSegmentIndex on one of them changes, I fire an event that causes the others to change their selectedSegmentIndex as well. I also set the index in viewDidLoad to ensure it is correct the first time the view is displayed.
This all works as expected, except that when I switch to a different view I can see the segmented control animate its button to the correct position, even though the selectedSegmentIndex may have been set much earlier.
Can anyone tell me what is going on here? Is there a way to disable this animation (when setting the index programmatically)?

Here is the working solution from the comments:
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
UIView.performWithoutAnimation {
segmentedControl.selectedSegmentIndex = 0
segmentedControl.layoutIfNeeded()
}
}

I know this answer is very late but in case anyone else needs same solution;
Layer of subviews of SegmentedControl has their own animation. Which are;
SelectionScale
SelectionPosition
SelectionBounds
here is a sample code from my project, I wrote whole new class for my UISegmentedControl
let foregroundIndex = numberOfSegments
if subviews.indices.contains(foregroundIndex),
let foregroundImageView = subviews[foregroundIndex] as? UIImageView {
foregroundImageView.layer.removeAllAnimations()
}
this is going to remove all animations over the selected UISegment and there will be no transition, it'll just snap.

Xcode: TableView cell to create ViewController

I've recently started using Xcode and Beginner to creating apps. I've come across something I'd like to implement but research hasn't been quite clear/complicated to understand.
I have a TableView with Days of Week and also a segmentedControl that duplicates these days 3 times. I'm wondering how I'm able to get user click to take me to an alternative ViewController depending on which day it is and what segment of the segmentedController is selected without having to create 21 viewcontrollers in the storyboard.
I've used a ViewController and made an outlet to a tableView for this setup.

in you tableview delegate method -> didSelectedRowAtIndexPath
you can simply write
let vc = UIViewController()
/*
you can add informations here
*/
present(vc, animated: true)
and inside this method you can use the indexPath to get the cell you've clicked
let cell = tableView.cellForRowAt(indexPath)
now you can get the information in this cell

You can have one viewcontroller which is basically a recipe for the viewcontroller you want to go to.
For example you want to show a viewcontroller with a label that states a combination of the number from the segmented control and the date which the user tapped on.
If you now create a ViewController which has a label in storyboard, the text on the label doesnt matter, you can use code to change the text to anything you would like.
In the tableviewcontroller you can use the didSelect delegate method of your tableview to present the viewcontroller and set the label to the values of the segmented control and the cell which is tapped.
I think you just need some more information about iOS and programming in general, therefore I suggest you watch the following iTunes U course:
https://itunes.apple.com/us/course/developing-ios-10-apps-with-swift/id1198467120
It has everything you need to know

Create a detail view controller with two variables (Ex - dayName and selectedSegmentIndex). And in your current viewController "tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)" push detailsViewController with these details like this
let objViewController: DetailsViewController? = UIStoryboard.mainStoryboard().instantiateViewController(withIdentifier: "DetailsViewController") as? DetailsViewController
objViewController?.dayName = dayName
objViewController?.selectedSegment = segmentControl.selectedSegmentIndex
navigationController?.pushViewController(objViewController ?? UIViewController(), animated: true)

Disable swipe back gesture in Swift

Been looking around on here for a while but can't seem to find a working solution.
I'm trying to disable the swipe to go back to previous view gesture, in Swift.
I've tried a variety of solutions including:
self.navigationController?.interactivePopGestureRecognizer.enabled = false
and
self.navigationController.interactivePopGestureRecognizer.delegate = self
func gestureRecognizerShouldBegin(gestureRecognizer: UIGestureRecognizer!) -> Bool {
return false
}
Is there a new method of doing this or some other method that works?

The following is an easy approach to disabling & re-enabling the swipe back.
Swift 3.x & up
In a viewDidLoad/willAppear/didAppear method add:
navigationController?.interactivePopGestureRecognizer?.isEnabled = false
Just keep in mind that if you do it with viewDidLoad, then the next time you open the view, it may not be set depending upon whether or not it remains in your stack.
Unless you want it to remain off, you will need to turn it back on when the view is closed via either willMove(toParentViewController:) or willDisappear. Your navigationController will be nil at viewDidDisappear, so that is too late.
navigationController?.interactivePopGestureRecognizer?.isEnabled = true
A special note on SplitViewControllers:
As pointed out by CompC in the comments, you will need to call the second navigation controller to apply it to a detail view as such:
navigationController?.navigationController?.interactivePopGe‌​stureRecognizer?.isE‌​nabled = false
Swift 2.2 & Objective-C
Swift versions 2.x & below:
navigationController?.interactivePopGestureRecognizer?.enabled
Objective-C:
self.navigationController.interactivePopGestureRecognizer.enabled

You could disable it but that would not be to recommended as most iOS users go back by swiping and less by pressing the back button.
If you want to disable it it would be more reasonable to use a modal segue instead of a push segue which is not that big of a transfer.
If you really want to get rid of the swipe to go back function I would just disable the back button and have a done button on the top right of the screen.
self.navigationController?.navigationItem.backBarButtonItem?.isEnabled = false;

I was able to do this by returning false in gestureRecognizerShouldBegin
class ViewController2: UIViewController, UIGestureRecognizerDelegate {
...
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
self.navigationController?.interactivePopGestureRecognizer.delegate = self
}
func gestureRecognizerShouldBegin(gestureRecognizer: UIGestureRecognizer) -> Bool {
return false
}

Add this line before pushing view controller to navigation controller
self.navigationController?.interactivePopGestureRecognizer?.isEnabled = false

Nothing wrong with either answer from Hari or Stefan but this is more succinct. Just put it in viewDidLoad and you're done.
if navigationController!.respondsToSelector(Selector("interactivePopGestureRecognizer")) {
navigationController!.view.removeGestureRecognizer(navigationController!.interactivePopGestureRecognizer)
}
EDIT:
One small caveat is that if the Navigation Controller was opened by another view and the Navigation Controller is closed then you'll get an EXC_BAD_ACCESS error. To fix it you have to save the original UIGestureRecognizer and put it back when you exit the view.
Declare:
private var popGesture: UIGestureRecognizer?
Immediately before removing the gesture:
popGesture = navigationController!.interactivePopGestureRecognizer
Then when closing the view:
If popGesture != nil {
navigationController!.view.addGestureRecognizer(popGesture!)
}

RowanPD's logic for Swift 4
private var popGesture: UIGestureRecognizer?
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if navigationController!.responds(to: #selector(getter: UINavigationController.interactivePopGestureRecognizer)) {
self.popGesture = navigationController!.interactivePopGestureRecognizer
self.navigationController!.view.removeGestureRecognizer(navigationController!.interactivePopGestureRecognizer!)
}
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
if let gesture = self.popGesture {
self.navigationController!.view.addGestureRecognizer(gesture)
}
}

Instead of
self.navigationController.pushViewController(VC, animated: Bool)
call
self.navigationController.setViewContollers([VC], animated: Bool)
setViewControllers replaces the all the VCs on the stack, instead of adding a new controller on top. This means that the new set VC is the root VC, and the user cannot go back.
This is most effective when you only want to disable the swipe on a single VC, and keep the swipe-to-back for the other VC.
If you want users to be able to go back, just not through swiping, do not use this method as it will disable all backs (as there is no VC to go back to).

for objective -c
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:true];
self.navigationController.interactivePopGestureRecognizer.enabled = NO;
}

This is something you missed if it doesn't work after you tried all.
Add navigationController?.interactivePopGestureRecognizer?.isEnabled = false
to your viewWillAppear(animated:) method.
if it doesn't work, remove navigation delegate from the view controller. Check again if your view controller is confirming UINavigationControllerDelegate, UIGestureRecognizerDelegate protocols. if so, just remove it.

I generally make sure that swipe back is enabled in as many places as possible, even adding a custom gesture recognizer to add it to modal screens. However for an authentication and download process in my app I start the process with a modal navigation controller and then push the view for each next step. However, once it's completed I want to prevent them from backing up into the authentication screens.
For this scenario I've been using:
navigationController?.interactivePopGestureRecognizer?.isEnabled = false
navigationItem.hidesBackButton = true
in viewWillAppear() on the final screen. You can undo these in viewWillDisappear() if you're pushing another view and need them there.

Come here a little bit late. In my case self.navigationController?.navigationItem.backBarButtonItem?.isEnabled = false; not working. So I do this: you can present view controller instead of push view controller. This way the swipe back gesture will not apply to the view controller.
navigationController?.present(vc, animated: true)
You could use dismiss for your custom back button
self.dismiss(animated: true)
Note: You could set VC modal presentation style before present it to make sure it's full screen.
vc.modalPresentationStyle = .fullScreen
Hope this help.

If requirement is to show side menu on some of the screens then add AddScreenEdgePanGesture on this specific view instead of navigationController view
replace it
SideMenuManager.default.menuAddScreenEdgePanGesturesToPresent(toView: self.navigationController?.view)
with this
SideMenuManager.default.menuAddScreenEdgePanGesturesToPresent(toView: self.view)

Only complete removal of the gesture recognizer worked for me (from the presenting view controller).
if let navigationController = parent.navigationController,
let interactivePopGestureRecognizer = navigationController.interactivePopGestureRecognizer {
navigationController.view.removeGestureRecognizer(interactivePopGestureRecognizer)
}

Don't Use this if you don't want to come back, or you set the new rootViewController.
self.navigationController.pushViewController(VC, animated: Bool)
Use this
self.navigationController.setViewContollers([VC], animated: Bool)
setViewControllers Remove all the View Controllers on the stack then the user cannot go back. it will disable all backs

this worked for me
gesture(DragGesture(minimumDistance: 10, coordinateSpace: .global))
so minimum distance is the distance to which drag gesture start listening, setting to 0 removes any listening, but it will remove all interactions be aware, i have changed 0 to 10 to listen to tap gestures, but in your screen if you have any other interaction it will not work after adding this,

If you don't care about system back button appearance (for example, if you're using custom back button or navigation bar is hidden at all), it might help you:
navigationItem.hidesBackButton = true
It hides back button and disables swipe back gesture.

Unslide Delete Button UiTableViewCell

In my app, you can slide to delete a row as done here. After sliding, an alert pops up confirming the deletion. If you cancel it, I'd like to slide the row over so that the delete button is no longer visible. Right now I'm doing the following, but there's got to be a better way that looks more fluid.
self.tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation:UITableViewRowAnimation.Right)

disable edit mode on the tableView
objC: self.tableView.editing = NO;
swift: self.tableView.editing = false

disable touch interaction in UITableView

I have a UITableView that draws a subView when the user touches a cell.
The problem is that the subView drawing is animated and if the user is fast enough they can tap a cell multiple times which I want to disable during the animation and afterwards.
I've tried using this:
- (void) tableView: (UITableView*) tableView didSelectRowAtIndexPath: (NSIndexPath*) indexPath {
[[UIApplication sharedApplication] beginIgnoringInteractionEvents];
and also a bool variable:
if (isAnimating == NO) {
but neither seem to work. In each case rapid touches screws up everything.
Any help would be great thanks!

Try this...
After clicking on cell set
tableView.userInteractionEnabled = NO;

I know this is an old question however it lacked the swift version so,
in Swift 3 it is:
tableView.isUserInteractionEnabled = false;
and to turn it back on is:
tableView.isUserInteractionEnabled = true;
Just thought this might help someone if they were looking for the answer in swift 3 as I was, and ends up here.

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