I ended up downloading the .ics file via (https://github.com/KiranPanesar/MXLCalendarManager). I was then able to use EventKit to parse the downloaded .ics file into an EKEvent and open it via EKEventEditViewController (https://developer.apple.com/library/prerelease/ios/samplecode/SimpleEKDemo/Listings/Classes_RootViewController_m.html). A little round about but seemed to work. Here's how I setup my webview controller class that implements this:
@interface WebViewController : UIViewController <UIWebViewDelegate, EKEventEditViewDelegate> {
// EKEventStore instance associated with the current Calendar application
@property (nonatomic, strong) EKEventStore *eventStore;
// Default calendar associated with the above event store
@property (nonatomic, strong) EKCalendar *defaultCalendar;
@end
@implementation WebViewController
- (void)viewDidLoad {
[super viewDidLoad];
...
// Initialize the event store
self.eventStore = [[EKEventStore alloc] init];
}
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
NSURL *url = [request URL];
NSString *path = [url absoluteString];
NSRange range = [path rangeOfString:@".ics" options:NSCaseInsensitiveSearch];
if (range.length > 0) {
[self checkCalendarAndAddEvent:url];
return NO;
}
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
return YES;
}
-(void)checkCalendarAndAddEvent:(NSURL*)url
{
EKAuthorizationStatus status = [EKEventStore authorizationStatusForEntityType:EKEntityTypeEvent];
if(status == EKAuthorizationStatusAuthorized)
{
[self addEventToCalendar:url];
} else
{
[self.eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error)
{
if (granted)
{
// Let's ensure that our code will be executed from the main queue
dispatch_async(dispatch_get_main_queue(), ^{
// The user has granted access to their Calendar; add to calendar
[self addEventToCalendar:url];
});
}else
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Privacy Warning" message:@"Permission was not granted for Calendar"
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
}
}];
}
}
-(void) addEventToCalendar: (NSURL *)url
{
MXLCalendarManager* calendarManager = [[MXLCalendarManager alloc] init];
self.defaultCalendar = self.eventStore.defaultCalendarForNewEvents;
[calendarManager scanICSFileAtRemoteURL:url withCompletionHandler:^(MXLCalendar *calendar, NSError *error) {
MXLCalendarEvent *mxlEvent = calendar.events.firstObject;
EKEventEditViewController *addController = [[EKEventEditViewController alloc] init];
EKEvent * event = [EKEvent eventWithEventStore:self.eventStore];
event.location = mxlEvent.eventLocation;
event.startDate = mxlEvent.eventStartDate;
event.endDate = mxlEvent.eventEndDate;
event.title = mxlEvent.eventSummary;
event.notes = mxlEvent.eventDescription;
addController.event = event;
// Set addController's event store to the current event store
addController.eventStore = self.eventStore;
addController.editViewDelegate = self;
[self presentViewController:addController animated:YES completion:nil];
}];
}
@end
I also had to slightly modify parts of MXLCalendarManager.m to be ready for my specific types of .ics formatting. For example, my summary section of my .ics file looks like:
DESCRIPTION;LANGUAGE=en-us:The following details your appointment:\n\n\n
where as MXLCalendarManager is only looking for:
DESCRIPTION: (Something).
I modified the code as such to account for the ;ln. This also removed all the artificial line breaks but allowed me add my own in the summary description:
// Extract event description
[eventScanner scanUpToString:@"DESCRIPTION" intoString:nil];
[eventScanner scanUpToString:@":" intoString:nil];
[eventScanner scanUpToString:@"\nSEQUENCE" intoString:&descriptionString];
if(descriptionString.length > 1)
{
descriptionString = [descriptionString substringFromIndex:1];
descriptionString = [[[descriptionString stringByReplacingOccurrencesOfString:@"\nSEQUENCE" withString:@""] stringByReplacingOccurrencesOfString:@"\r\n " withString:@""] stringByReplacingOccurrencesOfString:@"\\n" withString:@"\n"];
}
