CODEWITHSUNDEEP
iosswiftsetneedsdisplay
Huichuang Xuanyuan
Huichuang Xuanyuan

Reputation: 113

Swift-NSTimer & setNeedDisplay

    NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(setNeedsDisplay) userInfo:self repeats:YES];

I want know how to write the code above in swift.thank u.

Upvotes: -1

Views: 292

Answers (4)

Santosh Kumar J M
Santosh Kumar J M

Reputation: 181

var timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(self.setNeedsDisplay), userInfo: self, repeats: true)

Upvotes: 0

Vivek Molkar
Vivek Molkar

Reputation: 3960

The code can be written as

Swift 2

var timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: Selector("setNeedsDisplay"), userInfo: self, repeats: true)

func setNeedsDisplay() {

}

Swift 3, 4, 5

var timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(self.setNeedsDisplay), userInfo: self, repeats: true)

@objc func setNeedsDisplay() {

}

Upvotes: 0

Bhoomi Jagani
Bhoomi Jagani

Reputation: 2423

var timer = NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: Selector("yourFunction"), userInfo: nil, repeats: true)


func yourFunction() {
    // Do something
 }


/////other way.......
 dispatch_after(timer, dispatch_get_main_queue()) { () -> Void in

     //do same like in yourFunction()

   }
 }

Upvotes: 0

Sanjay Mohnani
Sanjay Mohnani

Reputation: 5967

Sample usage NSTimer's timer schedule event -

// create a timer instance 
let timer = NSTimer(timeInterval: 1.0, target: self, selector: "timerEventTriggered:", userInfo: nil, repeats: true)

// adding timer to current run loop
NSRunLoop.currentRunLoop().addTimer(timer, forMode: NSRunLoopCommonModes)

// implement the event which is triggered by scheduled timer
func timerEventTriggered(timer:NSTimer!) {
    ...
}

Note : This was just the sample usage, you can change the variable and method names as per your context.

Upvotes: 0

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