Kotlin is a great language, it is to Android/Java what Swift is to iOS/Objective-C. It comes with a desktop Mac application to copy & paste your code, as well as a command line tool to transform a complete project to Kotlin. It does string transformations as well as some more complicated ones like transforming guard statements to negative if statements, properties, memory management and many others. It applies transformations to the Swift code to get as correct as possible Kotlin code (see limitations below). SwiftKotlin is a framework, a command line tool and a Mac application for translating Swift code into Kotlin. He is passionate about Apple platform and is keen to learn new technologies introduced by Apple.A tool to convert Swift code to Kotlin in a very easy and quick way. Muhammad Bilal is lead iOS App Developer at Techliance, a leading Custom Information Technology Services Company in United States. So, we can create wrapper classes in Swift and consume Objective C classes to provide the same functionality without rewriting anything. To conclude, the bridge header mechanism along with hidden swift file generated by XCode provides a way for Objective C and Swift classed to talk to each other and consume each other services. This is because unwrapping (!) is prone to errors. Resolve the optionality issue, by using if else or let guard statements, instead of unwrapping (!) the variables. For instance, to solve the double definition of variable issue, you will need to remove duplicate declarations. However, these issues can be addressed, and these tools save a lot of time and labour. Once you convert your application using these tools, you may still see some bugs and syntax errors like ![]() In that situation, you can use online and desktop converter tools to convert you Objective C app to a Swift app. Sometimes the project is huge in terms of source code and it takes a lot of time to change each individual file written in Objective C to swift that it seems easier to rewrite the whole project from scratch. In your swift classes where you want to access Objective C classes, so you will import the hidden Xcode generated file. Put the required Objective C header files in the created bridge header file to access these classes in Swift.ģ. When you create your swift file in an Objective C app, you will need to accept click on create bridge file.Ģ. Let us summarize this three-step process:ġ. Look at the Figure 5 given below.įigure 5 – Import the Xcode generated background Swift file into Objective-C classes to create Swift objects in Objective-C In the example I build, my project name is “Guilder” So the Xcode generated file name is “Guilder-swift.h”. The name of that file will be like “NameOfTheProject-swift.h” according to your project name. ![]() We will need to import that hidden (Xcode generated background file) Swift file into Objective C classes to create Swift objects in Objective C. To solve this issue, we will need the background file generated by Xcode when created the swift file in step 1. ![]() The bridge file allows Objective C classes to be imported swift classes but does not allow Swift class objects to be created in Objective C classes. Step 3: Import Xcode generated background Swift file to allow Swift objects in Objective-C At this stage, we can create objects of Objective C classes in Swift, however, if we try to create Swift classes objects in Objective C classes it will show an error. This bridge header file allows us to create Objective C objects in Swift classes. ![]() Figure 4 – Import the Header Files of Object-C in Bridging Header
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