The role of An iOS developer is to develop an applications for mobile devices powered by Apple’s iOS operating system and also a good iOS developer is proficient with one of the two programming languages for this platform. Objective-C or Swift. Being an iOS developers you must have a strong understanding of the patterns & practices that revolve around the iOS platform. As an iOS developer is much more than an app programmer they’re integral at every phase of  iOS development , from wire framing the screens of your app and software planning design, coding and integrations, and testing and submission to the App Store through to user interface (UI).