How to write a generic apply() function in Swift?

Question

Is there any way to get the following working in Swift 3?

 let button = UIButton().apply {
        $0.setImage(UIImage(named: \"UserLocation\"), for: .normal         


        

Answer 1

There's a very good and simple Cocoapods library available called Then that does exactly that. Only that it uses then instead of apply. Simply import Then and then you can do as the OP asked for:

import Then

myObject.then {
    $0.objectMethod()
}

let label = UILabel().then {
    $0.color = ...
}

Here's how the protocol is implemented: https://github.com/devxoul/Then/blob/master/Sources/Then/Then.swift

extension Then where Self: Any {
    public func then(_ block: (Self) throws -> Void) rethrows -> Self {
        try block(self)
        return self
    }