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iosswiftbuilder

Builder pattern set method in swift

I am just shifted from Android base to ios, looking for builder pattern get and set method in swift unable to find anything like it. Found following only

var ptype : String? {
    get{
        return self.ptype
    }set (ptype) {
        self.ptype = ptype
    }
}
Solution

  • The following tip looks like what you wanted https://github.com/vincent-pradeilles/swift-tips#implementing-the-builder-pattern-with-keypaths. I'll copy code here for quick looking.

    
protocol With {}

extension With where Self: AnyObject {
    @discardableResult
    func with<T>(_ property: ReferenceWritableKeyPath<Self, T>, setTo value: T) -> Self {
        self[keyPath: property] = value
        return self
    }
}

extension UIView: With {}

let view = UIView()

let label = UILabel()
    .with(\.textColor, setTo: .red)
    .with(\.text, setTo: "Foo")
    .with(\.textAlignment, setTo: .right)
    .with(\.layer.cornerRadius, setTo: 5)

view.addSubview(label)