closures - Completion Handlers in Swift -

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i'm new @ swift development , trying handle on closures , completion handlers. have function following declaration inside struct called objectdata

func getdata(id1:int, id2:int, completion: (dataobject? -> void))

i trying call function like

objectdata.getdata(1, id2: 2){     (let myobject) in }

but following error

cannot invoke 'getdata' argument list of type '(nsnumber, id2: nsnumber, (_) -> _)'

please can help

for better readability, change header this. remember have declare types, not variable names:

func getdata(id1:int, id2:int, completion: (objectdata?) -> (void))

now use syntax use closures:

self.getdata(1, id2: 1) { (data) -> (void) in       // code executed in closure }

if want study further, can find full syntax of closures here (notice appropriate name of website). hope helps!


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