An asynchronous nsurlconnection in a popup view in ios7 - ios

Question

I am creating an asynchronous NSURLconnection in a popup view in ios.
To implement the asynchronous NSURLconnection I implement the methods of the NSURLDelegate.
The problem occurs when the user taps outside the popup view and the view is dismissed.
leaving the nsurlconnection callbacks and other actions inside the view incomplete.
How can I assure that the actions inside the popup complete inspite of the dismissal of the view?
I tried putting an activity indicator inside the popup view till the actions are completed, but even then a tap outside the popup view dismisses the view.
I dont want the user to be left with an inactive app till actions are completed, instead I want the actions to be completed in the background.

Answer 1

If you want to send an asynchronous connection you can use this methods.
GET REQUEST
-(void)placeGetRequest:(NSString *)action withHandler:(void (^)(NSURLResponse *response, NSData *data, NSError *error))ourBlock {
NSString *url = [NSString stringWithFormat:#"%#/%#", URL_API, action];
NSURL *urlUsers = [NSURL URLWithString:url];
NSURLRequest *request = [NSURLRequest requestWithURL:urlUsers];
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:ourBlock];
}
POST REQUEST
-(void)placePostRequest:(NSString *)action withData:(NSDictionary *)dataToSend withHandler:(void (^)(NSURLResponse *response, NSData *data, NSError *error))ourBlock {
NSString *urlString = [NSString stringWithFormat:#"%#/%#", URL_API, action];
NSLog(urlString);
NSURL *url = [NSURL URLWithString:urlString];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
// Creamos el JSON desde el data
NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dataToSend options:0 error:&error];
NSString *jsonString;
if (! jsonData) {
NSLog(#"Got an error: %#", error);
} else {
jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSData *requestData = [NSData dataWithBytes:[jsonString UTF8String] length:[jsonString lengthOfBytesUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setValue:[NSString stringWithFormat:#"%d", [requestData length]] forHTTPHeaderField:#"Content-Length"];
[request setHTTPBody: requestData];
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:ourBlock];
}
}
EXAMPLE OF USE
- (void) getMyMethod:(NSString *)myParam1
myParam2:(NSString *)myParam2
myParam3:(NSString *)myParam3
calledBy:(id)calledBy
withSuccess:(SEL)successCallback
andFailure:(SEL)failureCallback{
[self placeGetRequest:[NSString stringWithFormat:#"api/myMethod?myParam1=%#&myParam2=%#&myParam3=%#",myParam1, myParam2, myParam3]
withHandler:^(NSURLResponse *response, NSData *rawData, NSError *error) {
NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)response;
NSInteger code = [httpResponse statusCode];
NSLog(#"%ld", (long)code);
if (code == 0){
// error
} else if (!(code >= 200 && code < 300) && !(code == 500)) {
NSString *string = [[NSString alloc] initWithData:rawData
encoding:NSUTF8StringEncoding];
NSLog(#"ERROR (%ld): %#", (long)code, string);
[calledBy performSelector:failureCallback withObject:string];
} else {
// If you receive a JSON
NSMutableDictionary *result = [NSJSONSerialization JSONObjectWithData:rawData options:0 error:nil];
// If you receive an Array
// NSArray *result = [NSJSONSerialization JSONObjectWithData:rawData options:0 error:nil];
// If you receive a string
// NSString *result = [[NSString alloc] initWithData:rawData encoding:NSUTF8StringEncoding];
[calledBy performSelector:successCallback withObject:result];
}
}];
}
CALL YOU MUST DO IN YOUR VIEW/CONTROLLER/ETC
(...)
[api getMyMethod:myParam1Value myParam2:myParam2Value myParam3:myParam3Value calledBy:self withSuccess:#selector(getMyMethodDidEnd:) andFailure:#selector(getMyMethodFailureFailure:)];
(...)
// Don't forget to set your callbacks functions or callbacks will do your app crash
-(void)getMyMethodDidEnd:(id)result{
// your actions with the result
// ...
}
-(void)getMyMethodFailure:(id)result{
// your actions with the result
// ...
}

Answer 2

To prevent the dismissal of popup view when tapping out side u need to implement this delegate method
- (BOOL)popoverControllerShouldDismissPopover:(UIPopoverController *)popoverController
{
return NO;
}
dismiss it by using the action
- (void)someAction
{
//check the operations are completed
.....
.....
[popoverController dismissPopoverAnimated:YES];
}