3/22/2023 0 Comments Two touch timer![]() ![]() This happens because we’re implicitly creating our timer on the defaultRunLoopMode, which is effectively the main thread of our application. For example, if the user has their finger touching the screen so they can scroll through a table view, your regular timers won’t get fired. One common problem folks hit when using timers is that they won’t fire when the user is interacting with your app. After 4.5 seconds the timer fires again.This is only 0.7 seconds after our previous fire event, but each fire date is calculated from the original regardless of tolerance. After 3.1 seconds the timer fires again.It’s 0.4 seconds late, but that’s still within our tolerance. After 2.4 seconds the timer fires again. ![]() iOS won’t allow your timer to drift, which means the next trigger might happen more quickly.Īs an example, consider a timer that was asked to execute every 1 second with a 0.5 second tolerance. If your repeating timer is executed a little late thanks to the tolerance you specified, that doesn’t mean it will continue executing late. ![]() The default tolerance is 0, but remember that the system automatically adds a little tolerance. This example creates a timer to run every 1 second, with 0.2 seconds of tolerance: let timer = Timer.scheduledTimer(timeInterval: 1.0, target: self, selector: #selector(fireTimer), userInfo: nil, repeats: true) However, the timer will never be executed before you ask it – tolerance adds time after your requested execution date. For example, if you ask for the timer to be run after 1 second with a tolerance of 0.5 seconds, it might be executed after 1 second, 1.5 seconds, 1.3 seconds, and so on. When you specify tolerance, you’re saying that the system can trigger your timer at any point between your original request and that time plus your tolerance. It allows you specify some leeway for the system when it comes to executing your timer: “I’d like for this to be run once a second, but if it’s 200 milliseconds late I won’t be upset.” This allows the system to perform timer coalescing, which is a fancy term that means it can combine multiple timers events together to save battery life. Let user = contextĪdding some tolerance to your timer is an easy way to reduce its energy impact. You’ll need an fireTimer() method for it to call, so here’s a simple one just for testing: func fireTimer() You can create and start a repeating timer to call a method like this: let timer = Timer.scheduledTimer(timeInterval: 1.0, target: self, selector: #selector(fireTimer), userInfo: nil, repeats: true) Sponsor Hacking with Swift and reach the world's largest Swift community! Creating a repeating timer ![]() Oh, and it's free if your app makes less than $10k/mo. RevenueCat makes it straightforward and reliable so you can get back to building your app. Set your life to ready with the myTouchSmart Outdoor/Indoor Plug-in Digital Timer 2 Pack.SPONSORED In-app subscriptions are a pain to implement, hard to test, and full of edge cases. Rest easy knowing your home is on an automatic lighting schedule and always be greeted by a well‑lit home, no matter what time you arrive. The grounded plug only occupies one outlet leaving the second receptacle free for use, and the built-in mounting loop makes hanging the timer near a GFCI outlet convenient. Blue LED indicator lights show at a glance which settings are activated. Whether you’re away for a few hours or a few weeks, the timers are a quick way to deter crime by giving your home a lived-in appearance.Įach timer is ideal for a varied routine, allowing you to set a unique schedule using up to two personalized my on/my off settings. A grounded outlet supports a variety of plug-in devices. The easy‑to‑program timers work with LED, CFL, incandescent and halogen bulbs, delivering simple automation to your outdoor or indoor lighting. Simplify your routine with the myTouchSmart™ Outdoor/Indoor Plug-in Digital Timer 2 Pack. ![]()
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