Term Archives

  1. Question: What are the tools required to develop iOS applications? Answer: iOS development requires Intel based Macintosh computer and iOS SDK. Question: Name the framework that is used to construct application’s user interface for iOS. Answer: The UIKit framework is used to develop application’s user interface for iOS. UIKit framework provides event handling, drawing model, windows, views, and controls […]
  2. Question: An app is loaded into memory but is not executing any code. In which state will it be in? Answer: An app is said to be in suspended state when it is still in memory but is not executing any code. Question: Assume that system is running low on memory. What can system do for suspended apps? […]
  3. Question: Which JSON framework is supported by iOS? Answer: We use the NSJSONSerialization class to convert JSON to Foundation objects and convert Foundation objects to JSON. An object that may be converted to JSON must have the following properties: ● The top level object is an NSArray or NSDictionary. ● All objects are instances of NSString, NSNumber, […]
  4. Question: If I call performSelector:withObject:afterDelay: – is the object retained? Answer: Yes, the object is retained. It creates a timer that calls a selector on the current thread’s run loop. It may not be 100% precise timewise as it attempts to dequeue the message from the run loop and perform the selector. Question: Can you explain what happens […]
  5. Question: What’s fast enumeration? Answer: Fast enumeration is a language feature that allows you to enumerate over the contents of a collection. (Your code will also run faster because the internal implementation reduces message send overhead and increases pipelining potential. Question: What’s a struct? Answer: A struct is a special C data type that encapsulates other pieces of data […]
  6. We already saw how to download Xcode by creating free apple developer account. Here we are going to explain the step by step procedure to set up the Xcode. Create a apple developer account ( Free ) from Here. Then click on “membership centre” and create new apple Id. Fill all the details and click “ […]
  7. Github

    In this chapter we see how to handle the resources like github , stack overflow to become a professional. Let’s see one by one and how to handle that. Git : Version Control System ( Keep reading and this will make sense towards the end ). Let’s say you have a project you want to work […]
  8. In this chapter we are going learn very most important concept that is App store process. It is nothing but, when we build iOS apps we need to upload that to app store , so that you can get the user experience in your application. It’s help us to improve our design, coding, some time we […]
  9. In previous chapters we saw how to code with Objective c.In this chapter we see how to use Objective c with iOS programming to create iOS app. Now we learn about View, Navigation controller, UI Elements, UIStoryboard, Autolayout, Delegates in practical not in theoretical. Navigation controller : A navigation controller manages a stack of view […]
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