I have the UIApplicationDelegate protocol in my main AppDelegate.m class, with the applicationDidBecomeActive method defined. I want to call a method when the application returns from the background, but the method is in another view controller. How can I check which view controller is currently showing in the applicationDidBecomeActive method and then make a call … Read more
I am working on catching errors in my app, and I am looking into using NSError. I am slightly confused about how to use it, and how to populate it. Could someone provide an example on how I populate then use NSError? 9 Answers 9
This question already has answers here: How to check iOS version? (36 answers) Closed 8 years ago. I want to check if the user is running the app on iOS less than 5.0 and display a label in the app. How do I detect which iOS is running on user’s device programmatically? Thanks! 10 Answers … Read more
Multiple colours in an NSString or NSMutableStrings are not possible. So I’ve heard a little about the NSAttributedString which was introduced with the iPad SDK 3.2 (or around 3.2) and is available on the iPhone as of iPhone SDK 4.0 beta. I would like to have a string that has three colours. The reason I … Read more
Goal: Allow a user to authentication with Facebook into an iOS application which requires access to a protected web service that I’m running. Assumptions: There is a native authentication (and registration) system in place for those users that opt not to use Facebook for sign in. Details: Assume we want to offer the option for … Read more
