为什么 SKAction.playSoundFileNamed 会崩溃？

Question

NOTE:

It has been a few days and I still am having this problem. One thing that would be helpful, is to know some troubleshooting ideas to try, so I can track down what is causing the crash. Any help that would lead me in the correct direction would be greatly appreciated.

---

I'm running in Xcode 8.2.1 on the simulator, as well as on several different iOS devices. I get the same problem wherever I go.

I have imported a small mp3 file into my spritekit project, called "cat_meow_1.mp3"

when I select the file, in Xcode, and hit the play button, it plays normally. Incidentally I have tried with various different files in various formats, with the same results.

in my code, which complies okay, when I get to the line:

run(SKAction.playSoundFileNamed("cat_meow_1.mp3", waitForCompletion: true))

I get a crash with the error message,

error: use of undeclared identifier '$r0'

Any suggestions how to debug this problem, or to figure out what I did wrong?

I also tried to preload the sound and make a class property, but got the same error. Here's what it looks like:

UPDATE:

After reinstalling Xcode, I still have the same problem. With certain files, I get white noise, while with other ones I get the error here. What else could be wrong with my system to cause this problem?

UPDATE 2:

tried my experiment on a separate mac, and basically it worked just fine. I reinstalled my OS, and got the same problem, with a little more of an error message this time, which reads:

2017-01-18 18:10:09.397565 sound attempt 2[533:124220] [DYMTLInitPlatform] platform initialization successful 2017-01-18 18:10:11.058506 sound attempt 2[533:124042] Metal GPU Frame Capture Enabled 2017-01-18 18:10:11.059146 sound attempt 2[533:124042] Metal API Validation Enabled error: use of undeclared identifier '$r0' warning: could not load any Objective-C class information. This will significantly reduce the quality of type information available.

Answer 1

After a couple days, I finally gave in and used Clean My Mac 3 to completely remove Xcode, as well as any and all related files... I must not have caught everything when previously I uninstalled/reinstalled it, because this time, there were none of my custom settings at all when I ran the reinstalled app.

It works now, thankfully, and I can get back to work.