How to define block in Swift like in Objective-C?

Question

In ObjectiveC i can define block which will be used many places like

typedef void (^APISuccessHandler)(RKObjectRequestOperation *operation, RKMappingResult *result);

and then use it in (for example) ViewController propery

@property (nonatomic, copy) APISuccessHandler successHandler;

How do same in swift?

Answer 1

Use typealias

typealias MyType=(str:String,num:Int)->()

Then,

var test:MyType = {(str,num) in
    println(str)
    println(num)
}

Execute the block

  test(str: "123", num: 1)

Output

123
1