IOS - Recursive Functions leaves Memory Allocations - ios

Question

I have a Test App, what i have in this App is a call made via a PHP script, once the data comes back the Recursive call is made again and again PHP Script is called and so on:
Whats happening is that every time [Self recusiveForumActivity]; is called i get 300kb of memory allocated and the memory usage keeps climbing when this recursive method is called. If i remove the method the memory usage stays stable. How can i overcome this so that i don't loose memory allocation at all, when the recursive method is called every time?
This is the code:
//
// ViewController.m
// Test
//
// Created by trikam patel on 30/06/2015.
// Copyright (c) 2015 trikam patel. All rights reserved.
//
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
-(NSString*)setupPhpCall:(NSString*)requestString :(NSString*)sciptPage{
//NSURLCache *sharedCache = [[NSURLCache alloc] initWithMemoryCapacity:0 diskCapacity:0 diskPath:0];
//[NSURLCache setSharedURLCache:sharedCache];
NSHTTPURLResponse *urlresponse = nil;
NSError *error = nil;
NSString *response = #"";
NSData *myRequestData = nil;
NSMutableURLRequest *request = nil;
NSData *returnData = nil;
myRequestData = [NSData dataWithBytes: [requestString UTF8String] length: [requestString length]];
//Create your request string with parameter name as defined in PHP file
request = [[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString: [NSString stringWithFormat: #"http://www.hugt.co.uk/%#", sciptPage]]];
// set Request Type
[request setHTTPMethod: #"POST"];
// Set content-type
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"content-type"];
// Set Request Body
[request setHTTPBody: myRequestData];
// Now send a request and get Response
//NSHTTPURLResponse* urlResponse = nil;
//NSError *error = nil;
//if(tmpArray.count == 0){
returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlresponse error: &error];
response = [[NSString alloc] initWithBytes:[returnData bytes] length:[returnData length] encoding:NSUTF8StringEncoding];
//}
// Log Response
urlresponse = nil;
error = nil;
myRequestData = nil;
request = nil;
returnData = nil;
//NSLog(#"%#",response);/****/
//[sharedCache removeAllCachedResponses];
if(response != nil){
return response;
}
return nil;
}
-(void)recurseForumActivity{
dispatch_queue_t concurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(concurrentQueue, ^{
__block NSString *myRequestStringForum = [NSString stringWithFormat:#"lastDate=%#&threadTitle=%#&threadCountry=%#&threadCategory=%#&threadSubCategory=%#&getData=0",#"",#"", #"", #"", #""];
__block NSString *responseForum = [self setupPhpCall:myRequestStringForum :#"getThreadRecurse.php"];
dispatch_async(dispatch_get_main_queue(), ^{
dispatch_queue_t concurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(concurrentQueue, ^{
dispatch_async(dispatch_get_main_queue(), ^{
[NSThread sleepForTimeInterval:2.0f];
responseForum = #"";
myRequestStringForum = #"";
[self recurseForumActivity];
});
});
});
});
}
- (void)viewDidLoad {
[super viewDidLoad];
[self recurseForumActivity];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end

Answer 1

Try using [object performSelector:method] instead of recursive call. A recursive function must always have a base/exit condition and your code doesn't have any such condition. So you must not make any recursive call here.
- (void)recurseForumActivity{
dispatch_queue_t concurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(concurrentQueue, ^{
__block NSString *myRequestStringForum = [NSString stringWithFormat:#"lastDate=%#&threadTitle=%#&threadCountry=%#&threadCategory=%#&threadSubCategory=%#&getData=0",#"",#"", #"", #"", #""];
__block NSString *responseForum = [self setupPhpCall:myRequestStringForum :#"getThreadRecurse.php"];
YourClass * __weak weakSelf = self;
dispatch_async(dispatch_get_main_queue(), ^{
dispatch_queue_t concurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(concurrentQueue, ^{
dispatch_async(dispatch_get_main_queue(), ^{
responseForum = #"";
myRequestStringForum = #"";
[weakSelf performSelector:#selector(recurseForumActivity) withObject:nil afterDelay:2.0f];
});
});
});
});
}