Is it possible to target older iOS versions when using Xcode 4.2 and iOS 5 SDK?

I just recently downloaded the Xcode 4.2 with iOS 5 SDK package and I immediately noticed that I am unable to use my iPhone 3Gs with iOS 4.2.1 for debugging. I am only able to debug and test on my iphone 4 with iOS 5 installed.

iOS 5 Best Practice (Release/retain?)

As a beginning iPhone programmer, what is the best practice for writing apps to be used either with iOS 5 or older versions? Specifically, should I continue using the release/retain of data, or should I ignore that? Does it matter?

UISegmentedControl change event not firing in iOS5

I have a UISegmentedControl whose "Value changed" event is wired up in Interface Builder to call my controller's -(IBAction)segmentChangeAction:(id)sender;

connectionDidFinishLoading called before didReceiveData with rails production sending photos

I have a rails 3.0.3 website that, in development mode, responds to a HTTP GET by calling didReceiveData and then connectionDidFinishLoading, and photo data is sent from the website to the iPhone and displayed correctly. But when I run the rails 3.0.3 website in production mode, connectionDidFinishLoading is called before didReceiveData. I'm using carrierwave to handle the photos for both the development and production rails sites.

animating storyboard tab bar controller items

I have a storyboard based application with the RootViewController as a Tab Bar Controller. my question is: is there a way to animate a view when changing between tabs?

Open camera in half portion of screen - iPhone

I want to ask that , can I open iPhone camera in some limited portion on view?

Video compression changes custom tab bar in iOS 5

I have implemented a custom tabbar in my app. Where I can scroll on the tab, and also the tab can have more than 5 buttons. The problem is when i pick a video with imagepickercontroller, the compressing video dialog box shows up. The video is compressed and when the imagepicker is dismissed, my custom tabBar gets distorted. The default tabbar shows at the bottom of the screen along with my custom tabbar. And this problem is only when i run the app on iOS 5 device. Please help me out here, either tell me how to avoid compression (tried setting the video quality to 'HIGH'), or some way around the compression thing.

Launch a controller from within an active story board

I have a pretty basic app flow that is quite linear, so it fits in with the storyboard quite well. However there is one requirement that I am not sure on how to achieve. Structurally the app flow looks like this.

Error in calling xml parser method

I am using retailligence barcode api and using nsxml parser method to parse the response below is the code but it didn't give call to parsing method. What's wrong there. Please help

iOS WebView > Display only main-content from a website including pictures

How do I fetch just the main-content part of a webpage and display it in an UIWEBVIEW? Link to the page

Resume Updating views after time is invalidated

Time is invalidated to pause the views from updating because pause button was hit to pause the audio file.

When is it best to do an NSManagedObjectContext save?

I have noticed that for a mobile application, saving on the main thread seems to take a bit when it compares to other applications on the device. Is it recommended to only save Core Data when the application enters the background or when an application closes instead of anytime items are added and sent / received from the api?

How do I change the tint color (background) of a UIActionSheet in iOS5?

I would like to change the tint color of my UIActionSheet for my iOS apps. Is there an easy answer or custom class which I can use to achieve this?

Unrecognized selector sent to instance?

I have seen that a few others have had this problem as well. I'm trying to follow a tutorial online that shows how to create animated pins on a MapView.

Iphone app that scans for networks in the area

I have a question; I want to be able to make an iPhone iOs5 app which can scan for networks and afterwords and prefereable filter one out [on SSID, for example], and show this in a list

Parsing JSON Feed iOS 5

I'm pretty new to iOS development, and I'm wanting to parse the values of a JSON twitter feed, so I can pull them through into a tableView.

Go to Navigation Controller scene from Navigation Controller that is inside a Tab Bar Controller

I've got following hierarchy in my storyboard:

Cylinder in OpenGL ES on iOS 5

I am pretty new in OpenGL ES and been searching the paste few days after some examples or tutorials about creating cylinders, but unfortunately without any luck!

What triggers iOS 5.0 cache purge?

As of iOS 5.0 Apple began to purge or clean the Caches directory inside individual applications when it decided the device was using too much space. Can anyone point me to the location of documentation or anecdotal information regarding at which threshold this cache cleaning occurs (for instance 90%+ disk usage) and how often it is checked?

Share Kit Scrolling Porblem

I am working on Share kit in both iOS 4.0 and iOS 5.0. When my twitter page opens it works fine in 4.0 but in iOS 5.0 the navigation bar of twitter page become disturbed when Scroll the Webpage. If any one have any solution, share with me...