Developing apps for iOS has been a growing sector for some time. The versatility and ubiquity of the iphone and iPad gave scores of developers a chance to bring their wild ideas to life and parade them in front of an enormous and relatively wealthy captive audience.As the competition on the App Store grew fiercer and the initial infatuation with the devices began to fade, more and more of the lucrative iOS development work came from big businesses requiring a mobile presence. In the initial gold rush and for some time after, there was real money to be made making technically simple apps which might appeal to niche audiences or just be good for a laugh. India developers were trying their hands at all sort of apps and entrepreneurs of all stripes needed coders to bring their next big thing to life. Ah, the salad days. This presents a somewhat distinctive drawback for iOS developers as there's such a lot breadth to the topic.Since an iPhone is used for many various sorts of things, it’s typically difficult to understand that skills to hone first you Should learn Core Audio before Core Data? If you would like to find out regarding animation, which of the many options should you choose? No more mortal can tackle it all, so where to spend one’s limited time? In this article, I hope to outline the menu of priorities a Junior iOS Developer ought to specialise in, so you can walk confidently into a junior-level job interview. NOTE: Before anyone gets up in arms regarding the position or admission of things on this list, bear in mind this is for a theoretical job, working on a theoretical project.The actual skills needed could vary wildly.We are wittingly painting with a good brush, but hopefully will cover all the important areas, not simply the bare minimum. Also, in an endeavor to be even-handed, you’ve primarily provided links to Apple documentation, you may however find it much easier to learn this material with the guidance of a code college or via uncounted online tutorials.Treehouse in fact will provide strong iphone app services in each Objective-C and Swift. The Must Haves These are topics you should have hands-on experience with and be comfortable talking about and implementing. That hands-on work needn’t be paid work and you won’t be expected to recite documentation from memory, but you should have at least moderate fluency in the following topics. Xcode & Interface Builder Building to Devices Distributing an App (preferably for an app on the App Store) Fluency with Swift OR Objective-C Cocoa Touch UIKit Auto Layout Understanding of MVC Debugging in Xcode Instruments Xib’s, Storyboards, Segues and related presentation/transition Core Data TableViews CollectionViews Parsing JSON Notifications, Delegation, Key Value Observation REST and/or SOAP Git, Subversion or other version control Understanding of Clean Coding Principles Understanding of SOLID Threading and Concurrency Unit Testing, XCTest (not an expert, but some experience) Have built for both iPhone and iPad, ideally in a universal app The Nice-to-Haves All of those topics and frameworks won’t be expected for each project, however altogether chance, a few will. Understanding what they're used for, wherever they sleep in the iOS landscape and, wherever potential, having active expertise, can show hiring managers that you just have gone on the far side the bare minimum. If Swift is your primary language, a minimum of some data of Objective-C If Obj-C is your primary language, a minimum of some data of Swift arc, Familiarity of the non-arc practices In-App Purchase