UIAlertView Coming after data upload not before start - iphone

Question

I am showing activity view but it showing after data to server is uploaded only may be due to main thread stop is there any way to show this activity while data is uploading. both at same time.
-(IBAction)startSyncButtonAction{
UIAlertView* alert= [[UIAlertView alloc] initWithTitle:#"Loading\nPlease Wait..." message:nil delegate:self cancelButtonTitle:nil otherButtonTitles: nil];
[alert show];
UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
indicator.center = CGPointMake(150, 100);
[indicator startAnimating];
[alert addSubview:indicator];
CereniaAppDelegate *appDelegate = (CereniaAppDelegate *)[[UIApplication sharedApplication] delegate];
for (int i=0; i<[appDelegate.coffeeArray count]; i++) {
Coffee *coffeeObj = [appDelegate.coffeeArray objectAtIndex:i];
int mycount=[appDelegate.coffeeArray count];
NSLog(#"My Array count is %d",mycount);
NSString*device_Id=coffeeObj.device_Id;
NSString*R1=coffeeObj.R1;
NSString*R2=coffeeObj.R2;
NSString*R3=coffeeObj.R3;
NSString*R4=coffeeObj.R4;
NSString*R5=coffeeObj.R5;
NSString*R6=coffeeObj.R6;
NSString*R7=coffeeObj.R7;
NSString*R8=coffeeObj.R8;
NSString*R9=coffeeObj.R9;
NSString*R10=coffeeObj.R10;
NSString*R11=coffeeObj.R11;
NSString*R12=coffeeObj.R12;
NSString*R13=coffeeObj.R13;
NSString*R14=coffeeObj.R14;
NSString*update_date_time=coffeeObj.update_date_time;
NSString*teritory1=coffeeObj.teritory;
int mycount1=[appDelegate.coffeeArray count];
NSLog(#"My Array After delete is %d",mycount1);
NSLog(#"device_Id%#",device_Id);
NSLog(#"R1%#",R1);
NSLog(#"R2%#",R2);
NSLog(#"R3%#",R3);
NSLog(#"R4%#",R4);
NSLog(#"R4%#",R5);
NSLog(#"R4%#",R6);
NSLog(#"R4%#",R7);
NSLog(#"R4%#",R8);
NSLog(#"R4%#",R9);
NSLog(#"R4%#",R10);
NSLog(#"R4%#",R11);
NSLog(#"R4%#",R12);
NSLog(#"R4%#",R13);
NSLog(#"R4%#",R14);
NSLog(#"update_date_time%#",update_date_time);
NSString *post =[[NSString alloc] initWithFormat:#"device_Id=%#&R1=%#&R2=%#&R3=%#&R4=%#&R5=%#&R6=%#&R7=%#&R8=%#&R9=%#&R10=%#&R11=%#&R12=%#&R13=%#&R14=%#&update_date_time=%#&teritory1=%#",device_Id,R1,R2,R3,R4,R5,R6,R7,R8,R9,R10,R11,R12,R13,R14,update_date_time,teritory1];
NSLog(post);
NSURL *url=[NSURL URLWithString:#"http://celeritas-solutions.com/pah_brd_v1/pfizersurvey/SyncSurveySTD.php"];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%d", [postData length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
[request setURL:url];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:postData];
NSError *error;
NSURLResponse *response;
NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *data=[[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];
NSLog(#"%#",data);
}
for (int i=0; i<[appDelegate.coffeeArray count]; i++) {
Coffee *coffeeObj = [appDelegate.coffeeArray objectAtIndex:i];
[appDelegate removeCoffee:coffeeObj];
}
[alert dismissWithClickedButtonIndex:0 animated:YES];
}

Answer 1

You can put on the main thread the alert and the uploading code, so when opening the alert call to an upload method (let say (void)uploadData) on another thread. Your code just stuck the UI until the all data is done uploading then the UI is free for the alert.
In the action -(IBAction)startSyncButtonAction, call to the alert and the UI stuff:
UIAlertView* alert= [[UIAlertView alloc] initWithTitle:#"Loading\nPlease Wait..." message:nil delegate:self cancelButtonTitle:nil otherButtonTitles: nil];
[alert show];
UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
indicator.center = CGPointMake(150, 100);
[indicator startAnimating];
[alert addSubview:indicator];
CereniaAppDelegate *appDelegate = (CereniaAppDelegate *)[[UIApplication sharedApplication] delegate];
for (int i=0; i<[appDelegate.coffeeArray count]; i++) {
Coffee *coffeeObj = [appDelegate.coffeeArray objectAtIndex:i];
int mycount=[appDelegate.coffeeArray count];
NSLog(#"My Array count is %d",mycount);
NSString*device_Id=coffeeObj.device_Id;
NSString*R1=coffeeObj.R1;
NSString*R2=coffeeObj.R2;
NSString*R3=coffeeObj.R3;
NSString*R4=coffeeObj.R4;
NSString*R5=coffeeObj.R5;
NSString*R6=coffeeObj.R6;
NSString*R7=coffeeObj.R7;
NSString*R8=coffeeObj.R8;
NSString*R9=coffeeObj.R9;
NSString*R10=coffeeObj.R10;
NSString*R11=coffeeObj.R11;
NSString*R12=coffeeObj.R12;
NSString*R13=coffeeObj.R13;
NSString*R14=coffeeObj.R14;
NSString*update_date_time=coffeeObj.update_date_time;
NSString*teritory1=coffeeObj.teritory;
int mycount1=[appDelegate.coffeeArray count];
NSLog(#"My Array After delete is %d",mycount1);
NSLog(#"device_Id%#",device_Id);
NSLog(#"R1%#",R1);
NSLog(#"R2%#",R2);
NSLog(#"R3%#",R3);
NSLog(#"R4%#",R4);
NSLog(#"R4%#",R5);
NSLog(#"R4%#",R6);
NSLog(#"R4%#",R7);
NSLog(#"R4%#",R8);
NSLog(#"R4%#",R9);
NSLog(#"R4%#",R10);
NSLog(#"R4%#",R11);
NSLog(#"R4%#",R12);
NSLog(#"R4%#",R13);
NSLog(#"R4%#",R14);
NSLog(#"update_date_time%#",update_date_time);
at the end of that call to a method in another thread
// Perform all the data initializations on a new thread
[NSThread detachNewThreadSelector:#selector(uploadData:) toTarget:self withObject:nil];
Then you need another method
-(void) uploadData:(id) obj
{
NSLog(post);
NSURL *url=[NSURL URLWithString:#"http://celeritas-solutions.com/pah_brd_v1/pfizersurvey/SyncSurveySTD.php"];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%d", [postData length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
[request setURL:url];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:postData];
NSError *error;
NSURLResponse *response;
NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *data=[[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];
NSLog(#"%#",data);
}
for (int i=0; i<[appDelegate.coffeeArray count]; i++) {
Coffee *coffeeObj = [appDelegate.coffeeArray objectAtIndex:i];
[appDelegate removeCoffee:coffeeObj];
[self performSelectorOnMainThread:#selector(dataDoneLoading:) withObject:_photos waitUntilDone:NO];
}
and put there all the upload code. at the end "dataDoneLoading" to stuff on mainthread again

Answer 2

Use
[self performSelector:#selector(displayAlertView) withObject:nil afterDelay:0.1];
Method.