I'm trying to pass a UIButton with a NSTimer's userinfo. I've read every post on stackoverflow on NSTimers. I'm getting very close but can't quite get there. This post has helped
func timeToRun(ButonToEnable:UIButton) {
var tempButton = ButonToEnable
timer = NSTimer.scheduledTimerWithTimeInterval(4, target: self, selector: Selector("setRotateToFalse"), userInfo: ["theButton" :tempButton], repeats: false)
}
the function the timer runs
func setRotateToFalse() {
println( timer.userInfo )// just see whats happening
rotate = false
let userInfo = timer.userInfo as Dictionary<String, AnyObject>
var tempbutton:UIButton = (userInfo["theButton"] as UIButton)
tempbutton.enabled = true
timer.invalidate()
}
I realise you've managed to fix this but I thought I would give you a little more information about using NSTimer
. The correct way to access the timer object and hence user info is to use it like below. When initialising the timer you can create it like this:
NSTimer.scheduledTimerWithTimeInterval(4, target: self, selector: Selector("setRotateToFalse:"), userInfo: ["theButton" :tempButton], repeats: false)
Timer.scheduledTimer(timeInterval: 1, target: self, selector:#selector(ViewController.setRotateToFalse), userInfo: ["theButton" :tempButton], repeats: false)
Then the callback looks like this:
func setRotateToFalse(timer:NSTimer) {
rotate = false
let userInfo = timer.userInfo as Dictionary<String, AnyObject>
var tempbutton:UIButton = (userInfo["theButton"] as UIButton)
tempbutton.enabled = true
timer.invalidate()
}
Therefore you don't need to keep a reference to the timer and avoid often nasty global variables where possible. You may run into an issue in swift if your class doesn't inherit from NSObject
where it says there is no callback defined but this can be easily fixed by adding @objc
at the beginning of the function definition.