I got this messages,when I updated Xcode7. Can you tell me solution? Thank.
This application is modifying the autolayout engine from a background thread, which can lead to engine corruption and weird crashes. This will cause an exception in a future release.
Stack:(
0 CoreFoundation 0x250df883 <redacted> + 150
1 libobjc.A.dylib 0x367dedff objc_exception_throw + 38
2 CoreFoundation 0x250df7b1 <redacted> + 0
3 Foundation 0x25f7be63 <redacted> + 170
4 Foundation 0x25e21ba7 <redacted> + 38
5 UIKit 0x292f3aa9 <redacted> + 52
6 UIKit 0x292f4487 <redacted> + 222
7 UIKit 0x299ccfa5 <redacted> + 288
8 UIKit 0x294e5fa9 <redacted> + 148
9 UIKit 0x291ed6bb <redacted> + 694
10 QuartzCore 0x28ab967d <redacted> + 128
11 QuartzCore 0x28ab4d79 <redacted> + 352
12 QuartzCore 0x28ab4c09 <redacted> + 16
13 QuartzCore 0x28ab4129 <redacted> + 368
14 QuartzCore 0x28ab3deb <redacted> + 590
15 WebCore 0x34a9c79f <redacted> + 282
16 CoreFoundation 0x250a2827 <redacted> + 14
17 CoreFoundation 0x250a2417 <redacted> + 454
18 CoreFoundation 0x250a077f <redacted> + 806
19 CoreFoundation 0x24ff31e9 CFRunLoopRunSpecific + 516
20 CoreFoundation 0x24ff2fdd CFRunLoopRunInMode + 108
21 WebCore 0x34040cdf <redacted> + 422
22 libsystem_pthread.dylib 0x37077c93 <redacted> + 138
23 libsystem_pthread.dylib 0x37077c07 _pthread_start + 110
24 libsystem_pthread.dylib 0x37075a24 thread_start + 8
)
I don't know what your code is, but I have an idea as to why this is happening. You must be having some UI changes done in a background thread.
Do not change UI from anything but the main thread, it is bound to make your application unstable, and crash unpredictably.
You can listen and do work from any thread, and encapsulate UI changes in a dispatch_async:
dispatch_async(dispatch_get_main_queue(), ^{
// Do UI stuff here
});
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