快速传入参数预定义或自定义函数

Question

我想将预定义函数（在枚举中可能是静态的）或闭包中的自定义函数之一作为参数传递给setter。如UIColor到UIView.backgroundColor（我可以设置.black或UIColor（...））。如何使用自定义课程？

class MyClass {
    var fun: ((String)->Void)?       

}

var obj = MyClass()
obj.fun = {print($0)} .   // It works now
obj.fun = .predefinedFunc // It's how i want to be able do

Answer 1

class MyClass {
    var fun: ((String)->Void)?

}
//MARK:- you have to make provide same param and return type in your predefined func.
func printer(Str :String)->Void{
    print(Str)
}

var obj = MyClass()
obj.fun = {print($0)}
obj.fun = printer