Thread starting methods

[self performSelectorOnMainThread:@selector(makeMyProgressBarMoving) withObject:nil waitUntilDone:NO];

[NSThread detachNewThreadSelector:@selector(presentModal) toTarget:self withObject:nil];

 #import "MBProgressHUD.h"

<MBProgressHUDDelegate>

MBProgressHUD *HUD;

HUD=[[MBProgressHUD alloc] initWithView:self.view];

HUD.graceTime=0.5;

HUD.delegate=self;

[self.view addSubview:HUD];

[HUD showWhileExecuting:@selector(fetchData:) onTarget:self withObject:nil animated:YES];

#pragma mark - HUD delegate
- (void)hudWasHidden{
    [HUD removeFromSuperview];
}