iOS app - advanced login screen - iphone

I am building a login screen for a universal iOS application.
One of my requirements is a secure login screen that will store the credentials on device.
All the tutorials I found on the web explained only on the UI part of the login screen.
Does anybody know any good tutorial from the security perspective of the login screen?
Cheers!
m88m

You want to read about the iOS Keychain. I wrote a comment an hour ago in a separate Stack Overflow question about the Keychain, where your app can safely store and retrieve credentials put into authentication fields.

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Rate and Review within an app take the user to app store thus leave our app - Totaly Undesired

Refering questions
URL for sending a user to the app review page on device's app store
Rating and reviews from within an IOS app
Direct "rate in iTunes" link in my app?
All the solutions to these question take the user to app store and leave our app.
Is it possible to rate and review the app from within app like a web view. So that the user may not have to leave the app.
Please suggest
Currently, it's changed. You can use SKStoreProductViewController to show App Store from within an app as described in my answer here.
There is no alternative. Users can only rate and review through the App Store app.

How to go to my new Facebook App

I'm testing out writing mobile web app that connects to Facebook.
I follow this guide here and created a app on facebook, and uploaded the code to my own server.
https://developers.facebook.com/docs/guides/mobile/web/
But then, I got to the point where it tells me to search for my own app in facebook.com. My app won't show up, and I found out they won't until you have some users and then it'll be indexed.
So how do I get to my app?
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You might have your app settings (on the advanced screen: https://developers.facebook.com/apps/APPID/advanced) set to either sandbox mode enabled or Social discover disabled.

How to change appstore application icon

Hi can any one suggest me it is possible or not and if possible then how?
The premise is that the user pays for the app via a website and they gets an access code to send to her guests via the website. The user downloads the free app from the iPhone store and enters the code. We're trying to figure out if we can enable each user to customize the app icon so it can appear with a different image or text on the user phone.
You can't. The application's icon (and the application's property list file) is in the application bundle, which cannot be modified.
This would also violate the iOS SDK Terms of Use and the iTunes Store Terms of Service; you cannot have a third-party receive payment to access a free iOS application.
You can customize the iOS icon of a web app clipping, and put the web site to be clipped behind your private paywall. Apple has been reported in the past to accept App store apps that generate URLs to customized clippable web apps. No idea if they currently or will continue to do so.
Icons on App store iOS apps for stock OS devices can only be changed by Apple approving an update.
Evan is right... This goes against so many terms of the iOS SDK.
One thing you could do (but I can't guarantee it will be accepted by Apple) is create a registration system on your website. Then have a login on the App as soon as it loads and check that the user has a valid account which has paid the subscription. You would have to handle all of your payment stuff on the webside though, meaning the app would be useless unless the user has already sorted that out. If you do this, on submission of your app make sure you provide Apple with a demo account username and password!
As for the icon, you can't change it once the App is submitted. It is bundled in with your app binary and there is also a logo included in iTunes connect. You can change them, but only by submitting a new binary.

Is there any mechanism provided by Apple Store to make the user sign-up to my website before he/she can download the application?

I am creating an iphone application that requires the users to have an account at my website.
But if i have to distribute it through apple store, how should I make the users of this Iphone Application first create an account with my website. There could be a few options like :
1) Ask the user to create an account when he/she tries to run the application on iphone.
2) Provide a 'Sign-Up' page in the Iphone application itself.
My question is "Is there any mechanism provided by Apple Store to make the user sign-up to my website before he/she can download the application".
Kindly give in your suggestions for the same. Which would be the best approach for solving my problem.
Thanks,
LG
There's no way to do this through the app store.
Yes: your two options are to create a sign in / sign up screen with cocoa, or to display your login webpage with a NSWebview.
I'd recommend the native control route...
No, you can't do that through Apples App Store.
You could provide the user with aviability to register to your site when opening your app, throug, say a NSWebView.
There are many ways to solve this, just not the one you might like.