iOS MKTileOverlay with self signed SSL certificate - ios

Question

I operate my own tileserver for maps. This server is accessible via HTTPS with an self signed certificate. Is there a chance to use MKTileOverlay
static NSString * const template = #"https://tile.myserverwithselfsignedcertificate.org/{z}/{x}/{y}.png";
MKTileOverlay *overlay = [[MKTileOverlay alloc] initWithURLTemplate:template];
overlay.canReplaceMapContent = YES;
[self.mapView addOverlay:overlay
level:MKOverlayLevelAboveLabels];
wiht a self-signed-certificate. I receive in the XCode log window unfortunately just an error message that the certificate is invalid.
For direct NSURLConnection requests I can use the solution as decribed e.g. here: http://www.cocoanetics.com/2010/12/nsurlconnection-with-self-signed-certificates/
But this does not work for my customized MKTileOverlay class.
Has anyone an idea if this is possible?
EDIT 21st August 2015
I believe I have to override the MKTileOverlay to something like this:
- (void)loadTileAtPath:(MKTileOverlayPath)path result:(void (^)(NSData *data, NSError *error))result
{
NSURLRequest *request = [NSURLRequest requestWithURL:[self URLForTilePath:path]
cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:20];
connectionApi = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];
}
- (void)connection:(NSURLConnection *)conn didReceiveData:(NSData *)data
{
[myData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)conn
{
// myData includes now the required tile,
// but how to pass it back to the result
// block of the loadTileAtPath method???
}
Has anyone an idea how too solve this?

Answer 1

I was able to solve it so:
- (void)loadTileAtPath:(MKTileOverlayPath)path result:(void (^)(NSData *data, NSError *error))result
{
NSURLRequest *request = [NSURLRequest requestWithURL:[self URLForTilePath:path]
cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:20];
if (!tileDict)
tileDict = [[NSMutableDictionary alloc] initWithCapacity:100];
NSURLConnection *connectionApi = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];
NSURL *myURL = [[connectionApi currentRequest] URL];
NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
__block id tileNotification;
tileNotification = [center addObserverForName:[NSString stringWithFormat:#"receivedTileFromInternet-%#", myURL]
object:nil
queue:nil
usingBlock:^(NSNotification *notification)
{
NSURL *myURL = [notification.userInfo objectForKey:#"tileUrl"];
if ([tileDict objectForKey:myURL])
{
[[NSNotificationCenter defaultCenter] removeObserver:tileNotification];
NSData *data = [tileDict objectForKey:myURL];
result(data, nil);
}
} ];
}
}
- (void)connection:(NSURLConnection *)conn didReceiveData:(NSData *)data
{
NSURL *myURL = [[conn currentRequest] URL];
if (![tileDict objectForKey:myURL])
{
NSMutableData *singleTile = [[NSMutableData alloc] initWithData:data];
[tileDict setObject:singleTile forKey:myURL];
}
else
{
[[tileDict objectForKey:myURL] appendData:data];
}
}
- (void)connectionDidFinishLoading:(NSURLConnection *)conn
{
NSURL *myURL = [[conn currentRequest] URL];
if (![tileDict objectForKey:myURL])
{
NSLog(#"Tile leer???");
}
else
{
NSDictionary* userInfo = [NSDictionary dictionaryWithObjectsAndKeys:myURL, #"tileUrl", nil];
NSNotificationCenter* nc = [NSNotificationCenter defaultCenter];
[nc postNotificationName:[NSString stringWithFormat:#"receivedTileFromInternet-%#", myURL] object:self userInfo:userInfo];
}
}