Cocoa and Cocoa Touch are the environments used to define apps that run in macOS, iOS, tvOS, and watchOS. The keys associated with the Cocoa environments provide support for Interface…
Category: IOS
What is certificate, provisioning profile, and Bundle-identifier.
Apple’s security scheme for deploying applications to iOS devices is notoriously difficult and has created many headaches for developers through inscrutable error messages when deploying from Xcode. However, Apple’s scheme…
Overview of the Project Navigator in Xcode
Overview of the Project Navigator in Xcode You have to work within the context of an Xcode project to develop an iOS app. After you have created your project in…
Downloading Data using NSURLConnection in IOS using Objective-C
Downloading Data using NSURLConnection in IOS using Objective-C There are several cases when you need to download an image from a specific url, so it is better that you know…
Downloading Data using NSURLSession in IOS using Objective-C
Downloading Data using NSURLSession in IOS using Objective-C Whether an app retrieves application data from a server, updates your social media status or downloads remote files to disk, it’s the…
What is Difference between Storyboard and XIB!
What is Difference between Storyboard and XIB! STORYBOARD In simple words Storyboard is one single file for all the views or screens that in yours apps. It transitions one screen…
Manually Adding a Swift Bridging Header !
Does Xcode automatically create one for me? Yes. Add a new Swift file to your Xcode project. Name it as you please and you should get an alert box asking…
Migrate from Swift 2.3 to Swift 3 and xCode 8 !
Upgrade to Xcode 8 without migrating to swift 3 ! We’re well into the betas of Xcode 8 which will contain the final release of Swift 3, hopefully set for…
Swift Technical Interview Questions and Answers !
Question #1 – Swift 1.0 or later What’s a better way to write this for loop with ranges?
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for var i = 0; i < 5; i++ { print("Hello!") } |
Answer:
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for _ in 0...4 { print("Hello!") } |
Question #2 – Swift 1.0 or later
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struct Tutorial { var difficulty: Int = 1 } var tutorial1 = Tutorial() var tutorial2 = tutorial1 tutorial2.difficulty = 2 |
What’s…
Swift Sets and their Methods in IOS !
In Objective-C there were three basic types of Data Structures, NSArray, NSDictionary, and NSSet. In Objective-C, the immutable and mutable forms were separate, so you also had NSMutableArray, NSMutableDictionary, and…