The iOs timer starts to lag behind? Possible iOS 10 problem.

[Xeeko]

I'm building a rhythm game, and I've gotten everything to work quite well, except on iOS, where I'm having some weird timing issues.

The way my code works now is like this:

At the start of the frame the music starts playing, and my Music Bar starts moving forward. As an example, every 0.500 seconds it overlaps an item and an event triggers, and every 2.0 seconds the bar jumps back to its original position. These events keep looping. This solutions works perfectly on windows, html5 and Android, but on iOS it begins to lag behind after a while, like the bar isn't moving fast enough, and everything gets out of sync with the music.

This used to work on iOS as well, nut I recently updated to xCode 8 ant iOS 10, and is seems the problems have occured after that. Has anyone else experienced timing issues on iOS?

Also, I've tried other solutions, other was of keeping time etc, but nothing works on iOS (while running perfectly on Android, using a rather slow Pad).

[Fernando]

please post a bug report with a small mfa that reproduce the problem for us check here.

[Xeeko]

EDIT: Updated with a cleaner example. Remember, the problem only occurs on iOS, testing on a device.

Here's an example mfa (https://www.dropbox.com/s/i4kyo181kd...mple2.mfa?dl=0), taken straight out of the game I'm working on. If you run it on the desktop it'll work perfectly, same on Android. But on iOs it'll start to get out of sync after just 30 seconds. Have submitted bug report.

[Xeeko]

By the way, I think the problem might have been there before iOS 10, I just didn't notice because I did most of the testing on desktop.

[Xeeko]

Seriously, I've been working on this nonstop for more than a week now, I can not figure out a way to accurately measure time. Does anyone have any ideas?

[RhysD]

Look into delta time if you want to do anything rhythm based. If there are any frame drops in your app things will get out of sync really quickly, especially if you are using the built in timer.

[Fernando]

mm the problem here is that the internal timer get sync via internet time to time and that is way you get that difference , I m trying to find one of the timer that does not get updated by the OS.

[Xeeko]

Look into delta time if you want to do anything rhythm based. If there are any frame drops in your app things will get out of sync really quickly, especially if you are using the built in timer.

Framerate is not the problem though, the problem is finding an accurate way to simply count time.