ios - Is it necessary to use [unowned self] in closures of UIView.animateWithDuration(...)? -

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    uiview.animatewithduration(1,         animations: { [unowned self] in             self.box.center = self.boxtoprightposition         },         completion: { [unowned self] completed in             self.box.hidden = true     })

is necessary avoid memory leak?

no, not needed in case. animations , completion not retained self there no risk of strong retain cycle.


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