xcode7下进度条崩溃

[ZSManager]

2015-10-31 12:35:54.803 YS[3182:30337] 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 0x000000010be0cf45 exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000010adb6deb objc_exception_throw + 48
2 CoreFoundation 0x000000010be0ce7d +[NSException raise:format:] + 205
3 Foundation 0x000000010ab2c289 _AssertAutolayoutOnMainThreadOnly + 79
4 Foundation 0x000000010a98ccce -[NSISEngine withBehaviors:performModifications:] + 31
5 UIKit 0x000000010d596d4a -[UIView(Hierarchy) _postMovedFromSuperview:] + 575
6 UIKit 0x000000010d594d53 __UIViewWasRemovedFromSuperview + 213
7 UIKit 0x000000010d594905 -[UIView(Hierarchy) removeFromSuperview] + 422
8 YS 0x0000000108060068 -[ZLPhotoPickerBrowserPhotoScrollView setProgress:] + 296
9 YS 0x000000010805fc7e __48-[ZLPhotoPickerBrowserPhotoScrollView setPhoto:]_block_invoke174 + 62
10 YS 0x00000001081ea4b1 __72-[SDWebImageDownloader downloadImageWithURL:options:progress:completed:]_block_invoke_2 + 897
11 YS 0x000000010811464b -[SDWebImageDownloaderOperation connection:didReceiveData:] + 2715
12 CFNetwork 0x000000010a2819ae __65-[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:]_block_invoke + 69
13 CFNetwork 0x000000010a281952 -[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:] + 199
14 CFNetwork 0x000000010a281aa7 -[NSURLConnectionInternal _withActiveConnectionAndDelegate:] + 48
15 CFNetwork 0x000000010a2561d0 _ZL30_NSURLConnectionDidReceiveDataP16_CFURLConnectionPK8__CFDatalPKv + 79
16 CFNetwork 0x000000010a0ec72b ___ZN27URLConnectionClient_Classic29_delegate_didReceiveDataArrayEv_block_invoke + 293
17 CFNetwork 0x000000010a1dd5eb ___ZN27URLConnectionClient_Classic18_withDelegateAsyncEPKcU13block_pointerFvP16_CFURLConnectionPK33CFURLConnectionClientCurrent_VMaxE_block_invoke_2 + 100
18 libdispatch.dylib 0x000000010ec0c49b _dispatch_client_callout + 8
19 libdispatch.dylib 0x000000010ebee54b _dispatch_block_invoke + 716
20 CFNetwork 0x000000010a0db6f0 _ZN19RunloopBlockContext13_invoke_blockEPKvPv + 24
21 CoreFoundation 0x000000010bd0c4c4 CFArrayApplyFunction + 68
22 CFNetwork 0x000000010a0db5e9 _ZN19RunloopBlockContext7performEv + 137
23 CFNetwork 0x000000010a0db4a2 _ZN17MultiplexerSource7performEv + 282
24 CFNetwork 0x000000010a0db2c4 _ZN17MultiplexerSource8_performEPv + 72
25 CoreFoundation 0x000000010bd39011 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17
26 CoreFoundation 0x000000010bd2ef3c __CFRunLoopDoSources0 + 556
27 CoreFoundation 0x000000010bd2e3f3 __CFRunLoopRun + 867
28 CoreFoundation 0x000000010bd2de08 CFRunLoopRunSpecific + 488
29 CoreFoundation 0x000000010bde0ff1 CFRunLoopRun + 97
30 YS 0x0000000108112559 -[SDWebImageDownloaderOperation start] + 1913
31 Foundation 0x000000010a949c47 __NSOQSchedule_f + 194
32 libdispatch.dylib 0x000000010ec0c49b _dispatch_client_callout + 8
33 libdispatch.dylib 0x000000010ebf28ec _dispatch_queue_drain + 2215
34 libdispatch.dylib 0x000000010ebf1e0d _dispatch_queue_invoke + 601
35 libdispatch.dylib 0x000000010ebf4a56 _dispatch_root_queue_drain + 1420
36 libdispatch.dylib 0x000000010ebf44c5 _dispatch_worker_thread3 + 111
37 libsystem_pthread.dylib 0x000000010ef3da9d _pthread_wqthread + 729
38 libsystem_pthread.dylib 0x000000010ef3b3dd start_wqthread + 13
)

[MakeZL]

Thanks ~ 已经fix。