Extra argument 'selector' in call - NSTime

问题:

I have the following line of code:

changeColour = NSTimer.scheduledTimerWithTimeInterval(TIMES, target: self, selector: "changeColourOfPage", repeats: true)

but it gives the error "Extra argument 'selector' in call"

when I change the TIMES variable to a number like 1.0, it works fine. The variable TIMES is set to 1.0.

Is this just a glitch, or am I being stupid about something? I need to use it to run a method at random intervals.

Please help!

回答1:

It looks like you're missing the userInfo argument. Try this:

let TIMES = 1.0
var changeColour = NSTimer.scheduledTimerWithTimeInterval(TIMES, target: self, selector: "restart", userInfo: nil, repeats: true)

回答2:

Just had this same issue. For me the problem was that I was passing a time interval as a Float not a Double. Simple fix was (using the code from the original post):

NSTimer.scheduledTimerWithTimeInterval(Double(TIMES), target: self, selector: Selector("changeColourOfPage"), userInfo:nil, repeats: true)

I had the same error message and once I cast the time as a Double it worked fine. Hope that helps someone!