http://stackoverflow.com/questions/40072918/how-to-call-non-escaping-closure-inside-a-local-closure
Non-parameter closures are @escaping, by default
non-parameter closures in Swift 3.0
Given the example:
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func test(closure: () -> ()) { let localClosure = { // escaping closure closure() } localClosure() // this is escaping! Thus, we must make parameter closure "closure" escaping as well } |
localClosure’s closure is @escaping which naturally means it cannot be allowed to wrap the non-escaping closure parameter “closure” of test(…).
Thus, the solution is that we may naturally mark closure as @escaping if we’d wish to process/wrap it as in the example.
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func test(closure: @escaping () -> ()) -> () -> () { let escapingLocalClosure = { closure() } return escapingLocalClosure } |