iOS/iPhone NSURLConnection Show Progress and Activity Indicator View (UIActivityIndicatorView)

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
    
    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
    
    NSURLRequest *theRequest =
    [NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.thaicreate.com/url/getGallery.php"]
                     cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
                 timeoutInterval:10.0];
    
    NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
    
    // Loading Show Alert View...
    loading = [[UIAlertView alloc] initWithTitle:@"" message:@"Please Wait..." delegate:nil cancelButtonTitle:nil otherButtonTitles:nil];
    UIActivityIndicatorView *progress= [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(125, 50, 30, 30)];
    progress.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;
    [loading addSubview:progress];
    [progress startAnimating];
    [progress release];
    [loading show];
    

}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    receivedData = [[NSMutableData alloc] init];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [receivedData appendData:data];
}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{

}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    if(receivedData)
    {
	// Hide Alert View
        [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
        [loading dismissWithClickedButtonIndex:0 animated:YES];
    }
}

[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;

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

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UITableViewDataSource,UITableViewDelegate>
{
    
    IBOutlet UITableView *myTable;
    
}

@property(nonatomic,assign) NSMutableData *receivedData;

@end

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

#import "ViewController.h"

@interface ViewController ()
{
    NSMutableArray *myObject;
    
    // A dictionary object
    NSDictionary *dict;
    
    // Define keys
    NSString *galleryid;
    NSString *name;
    NSString *titlename;
    NSString *thumbnail;
    
    UIAlertView *loading;
}

@end

@implementation ViewController

@synthesize receivedData;

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
    
    // Show Network IndicatorV
    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
    
    
    // Define keys
    galleryid = @"GalleryID";
    name = @"Name";
    titlename = @"TitleName";
    thumbnail = @"Thumbnail";
    
    // Create array to hold dictionaries
    myObject = [[NSMutableArray alloc] init];
    
    
    NSURLRequest *theRequest =
    [NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.thaicreate.com/url/getGallery.php"]
                     cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
                 timeoutInterval:10.0];
    
    NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
    
    // Loading...
    loading = [[UIAlertView alloc] initWithTitle:@"" message:@"Please Wait..." delegate:nil cancelButtonTitle:nil otherButtonTitles:nil];
    UIActivityIndicatorView *progress= [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(125, 50, 30, 30)];
    progress.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;
    [loading addSubview:progress];
    [progress startAnimating];
    [progress release];
    [loading show];
    
    
    if (theConnection) {
        self.receivedData = nil;
    } else {
		UIAlertView *connectFailMessage = [[UIAlertView alloc] initWithTitle:@"NSURLConnection " message:@"Failed in viewDidLoad"  delegate: self cancelButtonTitle:@"Ok" otherButtonTitles: nil];
		[connectFailMessage show];
		[connectFailMessage release];
    }
    
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    receivedData = [[NSMutableData alloc] init];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [receivedData appendData:data];
}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    
    [connection release];
    [receivedData release];
    
    // inform the user
    UIAlertView *didFailWithErrorMessage = [[UIAlertView alloc] initWithTitle: @"NSURLConnection " message: @"didFailWithError"  delegate: self cancelButtonTitle: @"Ok" otherButtonTitles: nil];
    [didFailWithErrorMessage show];
    [didFailWithErrorMessage release];
	
    //inform the user
    NSLog(@"Connection failed! Error - %@", [error localizedDescription]);
    
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    if(receivedData)
    {
        //NSLog(@"%@",receivedData);
        //NSString *dataString = [[NSString alloc] initWithData:receivedData encoding:NSASCIIStringEncoding];
        //NSLog(@"%@",dataString);
        
        [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
        [loading dismissWithClickedButtonIndex:0 animated:YES];
        
        id jsonObjects = [NSJSONSerialization JSONObjectWithData:receivedData options:NSJSONReadingMutableContainers error:nil];
        
        // values in foreach loop
        for (NSDictionary *dataDict in jsonObjects) {
            NSString *strGalleryID = [dataDict objectForKey:@"GalleryID"];
            NSString *strName = [dataDict objectForKey:@"Name"];
            NSString *strTitleName = [dataDict objectForKey:@"TitleName"];
            NSString *strThumbnail = [dataDict objectForKey:@"Thumbnail"];
            
            dict = [NSDictionary dictionaryWithObjectsAndKeys:
                    strGalleryID, galleryid,
                    strName, name,
                    strTitleName, titlename,
                    strThumbnail, thumbnail,
                    nil];
            [myObject addObject:dict];
        }
    
        [myTable reloadData];
    }
    
    
    // release the connection, and the data object
    [connection release];
    [receivedData release];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{

    int nbCount = [myObject count];
    if (nbCount == 0)
        return 1;
    else
        return [myObject count];
 
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    
    int nbCount = [myObject count];
    
    static NSString *CellIdentifier = @"Cell";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        // Use the default cell style.
        cell = [[[UITableViewCell alloc] initWithStyle : UITableViewCellStyleSubtitle
                                       reuseIdentifier : CellIdentifier] autorelease];
    }
    
    if (nbCount ==0)
        cell.textLabel.text = @"Loading...";
    else
    {
        NSDictionary *tmpDict = [myObject objectAtIndex:indexPath.row];
        
        NSURL *url = [NSURL URLWithString:[tmpDict objectForKey:thumbnail]];
        NSData *data = [NSData dataWithContentsOfURL:url];
        UIImage *img = [[UIImage alloc] initWithData:data];
        cell.imageView.image = img;
        
        cell.textLabel.text = [tmpDict objectForKey:name];
        cell.detailTextLabel.text= [tmpDict objectForKey:titlename];
    }
    
    //[tmpDict objectForKey:galleryid]
    //[tmpDict objectForKey:name]
    //[tmpDict objectForKey:titlename]
    //[tmpDict objectForKey:thumbnail]
    
    return cell;
}



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

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