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This repository has been archived by the owner on May 23, 2022. It is now read-only.

Replace NSTimer with CADisplayLink #100

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Replace NSTimer with CADisplayLink #100

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24 changes: 10 additions & 14 deletions TouchVisualizer/TouchView.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -9,10 +9,10 @@ final public class TouchView: UIImageView {

// MARK: - Public Variables
internal weak var touch: UITouch?
private weak var timer: Timer?
private var displayLink: CADisplayLink?
private var _config: Configuration
private var previousRatio: CGFloat = 1.0
private var startDate: Date?
private var startTime: CFTimeInterval = 0
private var lastTimeString: String!

public var config: Configuration {
Expand Down Expand Up @@ -59,7 +59,7 @@ final public class TouchView: UIImageView {
}

deinit {
timer?.invalidate()
displayLink?.invalidate()
}

// MARK: - Begin and end touching functions
Expand All @@ -69,12 +69,9 @@ final public class TouchView: UIImageView {
layer.transform = CATransform3DIdentity
previousRatio = 1.0
frame = CGRect(origin: frame.origin, size: _config.defaultSize)
startDate = Date()
timer = Timer.scheduledTimer(timeInterval: 1.0 / 60.0, target: self, selector: #selector(self.update(_:)), userInfo: nil, repeats: true)

RunLoop
.main
.add(timer!, forMode: RunLoop.Mode.common)
startTime = CACurrentMediaTime()
displayLink = CADisplayLink(target: self, selector: #selector(update(_:)))
displayLink?.add(to: .main, forMode: .common)

if _config.showsTimer {
timerLabel.alpha = 1.0
Expand All @@ -86,14 +83,13 @@ final public class TouchView: UIImageView {
}

func endTouch() {
timer?.invalidate()
displayLink?.invalidate()
displayLink = nil
}

// MARK: - Update Functions
@objc internal func update(_ timer: Timer) {
guard let startDate = startDate else { return }

let interval = Date().timeIntervalSince(startDate)
@objc internal func update(_ timer: CADisplayLink) {
let interval = CACurrentMediaTime() - startTime
let timeString = String(format: "%.02f", Float(interval))
timerLabel.text = timeString

Expand Down