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?

stackoverflow.com/questions/24077428/… for how to typedef, fuckingswiftblocksyntax.com for swift block syntax — Will M.
– Will M., Commented Jul 30, 2015 at 15:09

Leo · Accepted Answer · 2015-07-31 01:17:17Z

3

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

answered Jul 30, 2015 at 15:10

Leo

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