• http://stackoverflow.com/questions/1143589/what-is-the-pastrykit-framework
• http://daringfireball.net/2009/12/pastrykit
• http://ajaxian.com/archives/pastrykit-an-iphone-webdev-library-from-apple

Sencha Touch — you should definitely see their kitchen sink, it is pretty cool.but there is no commercial license yet.

• http://ajaxian.com/archives/sencha-touch
• http://mobile.tutsplus.com/articles/news/sencha-touch-html5-mobile-framework/
• http://www.endofnative.com/

iUi — not that many people using it I guess. I build a site with it, if it is sth fast and easy to learn, iUi can do the job.

• Sites build with iUi — http://code.google.com/p/iui/wiki/PoweredBy

jqtouch — demos seem very nice, probably better than iUi in terms of current release capabilities and size of community.

iWebkit — demo seems promising, but not ready for prime time.

SproutCore — not for iPhone specificly, but its demo seems nice.

So my choice for the next task is jqtouch. not iui this time.

After 3 nights the application was ready for the submission. It got rejected since I didn’t read the iPad User guidelines carefully (actually I just skimmed it in 5 minutes). The rejection reason is “You can’t show more than one popover at the same time”. I fixed the problem, and it is available in the app store (App Store link)

I will probably change the default RSS feed of Hackernews which only show top 30 posts. Probably something on GAE, and maybe a simple my favorites kind of thing.

-(void)showLoadingView
{
	CGRect transparentViewFrame = CGRectMake(0.0, 0.0,320.0,480.0);
	transparentView = [[UIView alloc] initWithFrame:transparentViewFrame];
	transparentView.backgroundColor = [UIColor lightGrayColor];
	transparentView.alpha = 0.9;

	UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
	spinner.center = transparentView.center;
	[spinner startAnimating];

	UILabel *messageLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 280, 320, 30)];
	messageLabel.textAlignment = UITextAlignmentCenter;
	messageLabel.text = @"please wait...";

	[transparentView addSubview:spinner];
	[transparentView addSubview:messageLabel];

	[self.view addSubview:transparentView];

	[messageLabel release];
	[spinner release];
	[transparentView release];
}

Now, you should call this function whenever needed. Let’s say you have a background process that will run while the transparent loading view is shown, below is the code to handle this situation:

-(void)myAction:(id)sender
{
	[self showLoadingView];

	[self performSelectorInBackground:@selector(myActionBackground:) withObject:sender];
}

-(void)myActionBackground:(id)sender
{
        NSAutoreleasePool *apool = [[NSAutoreleasePool alloc] init];
	//your code
        [apool release];
}

Memcache provides convenience to store a frequent query in memory, so that you don’t have to make the same execution over and over again. For the iPhone application I build (Fragman), I build a GAE/J backend for managing movie names, IMDB URLs, thumb images, video files, etc. It interacts with the Obj-c code via calls encoded in JSON.

Since the categories are updated so frequently (new trailer, top 250 , soap opera trailers), every time the user starts the application from her iPhone, the corresponding categories Id(key) lists are  created which includes all the aspects mentioned above,

what I see, after people start to use the application that, most of the time, the application got stuck with the time constraint of GAE and this causes inconvenience, so I decided to hold the category lists’s JSON in memory. Following is the code ,

this is the servlet for creating the JSON which is called after say upcoming movie list is changed. This servlet updates the memcached list

        List keyList = new ArrayList();
	static Cache cache;
	static
	{
		try
		{
			CacheFactory cacheFactory =

CacheManager.getInstance().getCacheFactory();
			cache = cacheFactory.createCache(

Collections.emptyMap());
		}
		catch (CacheException e)
		{
			// ...
		}
		//.....
                public void doGet(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException

	        {
                       //................
                       if(cache.containsKey(mode))
		       {
			     cache.remove(mode);
		       }
		       cache.put(mode, keyList);
	        }

                //........

          }

And this is the servlet that fetch the Fragman beans from the datastore with the given keys (key list is got from the memecached list)

          keyList = (List)cache.get(mode);

By doing this, I reduce the time that the servlet that creates the JSON takes.

2. In XCode open the info page and change Code Signing Identy to Don’t Code Sign.

3. In the terminal, set the environment variable  CODESIGN_ALLOCATE  as follows: (or you will get an error like this util/ldid.cpp(567): _assert(0:arch != NULL))
export CODESIGN_ALLOCATE=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/codesign_allocate

4. Open Fugu and connect to your iphone (you can download FUGU from here)(you can find the IP address your iphone from Settings->Wi-fi->ConnectedWirelessName) (Username should be root and password should be alpine OR dottie) (open your iphone and don’t let it pass to stand-by mode during these phases)

5. Go to root directory and from here go to Applications directory

6. In XCode, build your application, from Products folder, select Reveal in Finder

7. Upload the .app file to the Applications folder in your iPhone

8. Open a Terminal and connect to your iphone with ssh like (be  careful that iphone is not in stand-by mode)

root@192.168.1.5 and enter your password

9. First change the binary file permission of your application

chmod 755 /Applications/Appname.app/Appname

10. Then sign the app file with ldid

ldid -S /Applications/Appname.app/Appname

11. Restart the iphone, you are good to go

Note:
1. If ldid command can not be found, type apt-get install ldid OR aptitude install ldid
2. If apt-get can not be found install aptitude from Cydia

3.There are very useful pages on the net, so just google xcode and cydia, here is one of them http://thebigboss.org/hosting-repository/submit-your-app/compile-for-cydia-submission/

4. If you get an error like util/ldid.cpp(567): _assert(0:arch != NULL), there can be two possible reason for this, you either forget to export CODESIGN_ALLOCATE. The other possibility is that you build the application for the simulator. To fix this,  from XCOde change it to Device – 3.0  or sth similar . You should see it on the combo box top left top corner of XCode.