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Abstract functions in Swift Language Ask Question

tag-icon • tag-icon inheritance abstract-class swift
Abstract functions in Swift Language Ask Question

I'd like to create an abstract function in swift language. Is it possible?

class BaseClass {
    func abstractFunction() {
        // How do I force this function to be overridden?
    }
}

class SubClass : BaseClass {
    override func abstractFunction() {
        // Override
    }
}

ベストアンサー1

There no concept of abstract in Swift (like Objective-C) but you can do this : 

class BaseClass {
    func abstractFunction() {
        preconditionFailure("This method must be overridden") 
    } 
}

class SubClass : BaseClass {
     override func abstractFunction() {
         // Override
     } 
}

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