In the working version, I think the timer is first set to nil and then changed to the scheduled timer. In the non-working case time can only be set exactly once and self access is not legal until after it is set.
Ray > On Feb 1, 2017, at 8:06 PM, Brandon Knope via swift-users > <swift-users@swift.org> wrote: > > class Test { > let timer: Timer! > > init() { > timer = Timer.scheduledTimer(timeInterval: 20, target: self, > selector: #selector(test(_:)), userInfo: nil, repeats: true) > } > > @objc func test(_ timer: Timer) { > > } > }
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