I am currently developing an application specifically for iOS7 that utilizes UIDocumentInteractionController open in menu and need a method that notifies me when a user cancels and does not choose an available option.
UIDocumentInteractionControllerDelegate offers:
- (void)documentInteractionControllerDidDismissOptionsMenu:(UIDocumentInteractionController *) controller
but this does not specify whether the user tapped one of the available options or cancel.
Any ideas?
NOTE: This will not work for iOS 8 anymore, only iOS7 and earlier
To determine whether the user has canceled the menu or selected an option, you have to make use of the following delegate methods:
1-
- (void)documentInteractionController:(UIDocumentInteractionController *)controller
didEndSendingToApplication:(NSString *)application
{
//get called only when the user selected an option and then the delegate method bellow get called
// Set flag here _isOptionSelected = YES;
_isOptionSelected = YES;
}
2-
- (void)documentInteractionControllerDidDismissOpenInMenu:(UIDocumentInteractionController *)controller
{
//called whether the user has selected option or not
// check your flag here
if(_isOptionSelected == NO) {
//the user has canceled the menu
}
_isOptionSelected = NO;
}
iOS 8
For iOS 8 and above, use this method instead of the one in step 2:
- (void)documentInteractionController:(UIDocumentInteractionController *)controller
didEndSendingToApplication:(NSString *)application
BOOL didSelectOptionFromDocumentController = NO;//**set this to "NO" every time you present your documentInteractionController too
-(void)documentInteractionController:(UIDocumentInteractionController *)controller willBeginSendingToApplication:(NSString *)application {
didSelectOptionFromDocumentController = YES;
}
-(void)documentInteractionControllerDidDismissOpenInMenu:(UIDocumentInteractionController *)controller {
if (didSelectOptionFromDocumentController == NO) {//user cancelled.
}
}
It's not pretty but it works.
Can anyone tell me if this will pass App Review? Not sure as I'm referring to a class name which is not publicly accessible (_UIDocumentActivityViewController). This is Swift 2.2!
NSObject Extension to get a string of the class name:
extension NSObject {
var theClassName: String {
return NSStringFromClass(self.dynamicType)
}
}
Your Viewcontroller where you're calling the UIDocumentInteractionController from:
var appOpened = false
var presentedVCMonitoringTimer: NSTimer!
var docController: UIDocumentInteractionController!
func openDocController() {
docController = UIDocumentInteractionController(URL: yourURL!)
docController.UTI = "your.UTI"
docController.delegate = self
docController.presentOptionsMenuFromRect(CGRectZero, inView: self.view, animated: true)
// Check the class of the presentedViewController every 2 seconds
presentedVCMonitoringTimer = NSTimer.scheduledTimerWithTimeInterval(2, target: self, selector: #selector(self.checkPresentedVC), userInfo: nil, repeats: true)
}
func checkPresentedVC() {
if let navVC = UIApplication.sharedApplication().keyWindow?.rootViewController as? UINavigationController {
print(navVC.presentedViewController?.theClassName)
if navVC.presentedViewController != nil && (navVC.presentedViewController?.theClassName)! != "_UIDocumentActivityViewController" && (navVC.presentedViewController?.theClassName)! != self.theClassName {
// A system App was chosen from the 'Open In' dialog
// The presented ViewController is not the DocumentInteractionController (anymore) and it's not this viewcontroller anymore (could be for example the MFMailComposeViewController if the user chose the mail app)
appOpened = true
presentedVCMonitoringTimer?.invalidate()
presentedVCMonitoringTimer = nil
}
}
}
func documentInteractionControllerDidDismissOptionsMenu(controller: UIDocumentInteractionController) {
print("dismissedOptionsMenu")
presentedVCMonitoringTimer?.invalidate()
presentedVCMonitoringTimer = nil
if appOpened {
// Do your thing. The cancel button was not pressed
appOpened = false
}
else {
// Do your thing. The cancel button was pressed
}
}
func documentInteractionController(controller: UIDocumentInteractionController, willBeginSendingToApplication application: String?) {
// A third party app was chosen from the 'Open In' menu.
appOpened = true
presentedVCMonitoringTimer?.invalidate()
presentedVCMonitoringTimer = nil
}
For Swift 4, use this:
func documentInteractionControllerDidDismissOpenInMenu(_ controller: UIDocumentInteractionController) {
// this function get called when users finish their work,
// either for sharing thing within the same app or exit to other app will do
}
I use it when after users have shared image to Facebook and Instagram.
