iOS/iPhone and Thread (NSThread, Objective-C)

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

- (void) CrateThread
{
  
}

- (void) CrateThread
{
            dispatch_async(dispatch_get_main_queue(), ^{
                lblText.text = result;
            });
}

//
//  ViewController.h
//  NSThreadApp
//
//  Created by Weerachai on 12/8/55 BE.
//  Copyright (c) 2555 Weerachai. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
{
    IBOutlet UITextView *lblTextView;
}

- (IBAction)btnCreateThread:(id)sender;

@end

//
//  ViewController.m
//  NSThreadApp
//
//  Created by Weerachai on 12/8/55 BE.
//  Copyright (c) 2555 Weerachai. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
{
    int threadNo;    
}

@end

@implementation ViewController


- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
}

- (IBAction)btnCreateThread:(id)sender {
    if(threadNo==0)
        threadNo = 1;
    
    NSMutableString *threadName = [NSString stringWithFormat:@"Thread No %d",threadNo];
    
    [NSThread detachNewThreadSelector:@selector(CrateThread:) toTarget:self withObject:threadName];
    //[NSThread sleepForTimeInterval:5];
    threadNo++;
}

- (void) CrateThread:(NSString *) threadName
{
        
    for(int i = 0; i <= 10; i++)
    {
        NSMutableString *str = [NSString stringWithFormat:@"(%@) Loop i=%d",threadName,i];
            dispatch_async(dispatch_get_main_queue(), ^{
                lblTextView.text = str;
            });
        sleep(1);
        NSLog(@"%@",str);
    }

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


- (void)dealloc {
    [lblTextView release];
    [super dealloc];
}
@end

//
//  ViewController.h
//  NSThreadApp
//
//  Created by Weerachai on 12/8/55 BE.
//  Copyright (c) 2555 Weerachai. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

- (IBAction)btnCreateThread:(id)sender;

@end

//
//  ViewController.m
//  NSThreadApp
//
//  Created by Weerachai on 12/8/55 BE.
//  Copyright (c) 2555 Weerachai. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
{
    int positionX;
}

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
}

- (IBAction)btnCreateThread:(id)sender {
    
    if(positionX == 0)
        positionX = 80;
    else
        positionX = positionX + 20;
    
    UIProgressView *progress = [[UIProgressView alloc] initWithFrame:CGRectMake(10,positionX,300,30)];
    [[self view] addSubview:progress];
    [progress release];
    
    [NSThread detachNewThreadSelector:@selector(CrateThread:) toTarget:self withObject:progress];
    //[NSThread sleepForTimeInterval:5];
    
}

- (void) CrateThread:(UIProgressView *) progress
{
  
        [progress setProgress:0.0];
        
        while(progress.progress < 1.0)
        {
            //NSLog(@"%.2f",progress.progress);
            dispatch_async(dispatch_get_main_queue(), ^{
                progress.progress = progress.progress + 0.01;
            });
            sleep(1);
        }

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


@end