在borwser显示后，卡住约莫有0.5秒，不能响应事件

[weiminghuaa]

No description provided.

[xujinhui]

sometimes gets stuck when Loading pictures,and xcode log like this:
UI API called on a background thread: -[UIView layer]
PID: 4312, TID: 1271737, Thread name: (none), Queue name: NSOperationQueue 0x109651ae0 (QOS: UNSPECIFIED), QoS: 0
Backtrace:
4 myOffer 0x0000000105320e30 -[DACircularProgressView circularProgressLayer] + 40
5 myOffer 0x0000000105321098 -[DACircularProgressView progress] + 40
6 myOffer 0x000000010535f70c -[IDMZoomingScrollView setProgress:forPhoto:] + 348
7 myOffer 0x00000001053595ec __42-[IDMPhotoBrowser configurePage:forIndex:]_block_invoke + 116
8 myOffer 0x00000001053509d0 __40-[IDMPhoto loadUnderlyingImageAndNotify]_block_invoke + 216
9 myOffer 0x00000001053897a0 -[SDWebImageDownloaderOperation URLSession:dataTask:didReceiveData:] + 2304
10 myOffer 0x0000000105385e7c -[SDWebImageDownloader URLSession:dataTask:didReceiveData:] + 168
11 CFNetwork 0x0000000184bce5f4 _CFNetworkHTTPConnectionCacheSetLimit + 204768
12 Foundation 0x0000000181bed61c 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 1132060
13 Foundation 0x0000000181af73d8 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 123864
14 Foundation 0x0000000181bef8a4 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 1140900
15 Foundation 0x0000000181af7070 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 122992
16 Foundation 0x0000000181bf029c 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 1143452
17 Foundation 0x0000000181befd68 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 1142120
18 libdispatch.dylib 0x00000001094f5298 _dispatch_block_async_invoke2 + 104
19 libdispatch.dylib 0x00000001094e6c04 _dispatch_client_callout + 16
20 libdispatch.dylib 0x00000001094e9808 _dispatch_continuation_pop + 524
21 libdispatch.dylib 0x00000001094e8c88 _dispatch_async_redirect_invoke + 624
22 libdispatch.dylib 0x00000001094f8168 _dispatch_root_queue_drain + 376
23 libdispatch.dylib 0x00000001094f8a90 _dispatch_worker_thread2 + 156
24 libsystem_pthread.dylib 0x0000000181545f64 _pthread_wqthread + 212
25 libsystem_pthread.dylib 0x0000000181548ae0 start_wqthread + 8
2019-09-30 15:28:02.611579+0800 myOffer[4312:1271737] [reports] Main Thread Checker: UI API called on a background thread: -[UIView layer]
PID: 4312, TID: 1271737, Thread name: (none), Queue name: NSOperationQueue 0x109651ae0 (QOS: UNSPECIFIED), QoS: 0
Backtrace:
4 myOffer 0x0000000105320e30 -[DACircularProgressView circularProgressLayer] + 40
5 myOffer 0x0000000105321098 -[DACircularProgressView progress] + 40
6 myOffer 0x000000010535f70c -[IDMZoomingScrollView setProgress:forPhoto:] + 348
7 myOffer 0x00000001053595ec __42-[IDMPhotoBrowser configurePage:forIndex:]_block_invoke + 116
8 myOffer 0x00000001053509d0 __40-[IDMPhoto loadUnderlyingImageAndNotify]_block_invoke + 216
9 myOffer 0x00000001053897a0 -[SDWebImageDownloaderOperation URLSession:dataTask:didReceiveData:] + 2304
10 myOffer 0x0000000105385e7c -[SDWebImageDownloader URLSession:dataTask:didReceiveData:] + 168
11 CFNetwork 0x0000000184bce5f4 _CFNetworkHTTPConnectionCacheSetLimit + 204768
12 Foundation 0x0000000181bed61c 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 1132060
13 Foundation 0x0000000181af73d8 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 123864
14 Foundation 0x0000000181bef8a4 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 1140900
15 Foundation 0x0000000181af7070 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 122992
16 Foundation 0x0000000181bf029c 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 1143452
17 Foundation 0x0000000181befd68 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 1142120
18 libdispatch.dylib 0x00000001094f5298 _dispatch_block_async_invoke2 + 104
19 libdispatch.dylib 0x00000001094e6c04 _dispatch_client_callout + 16
20 libdispatch.dylib 0x00000001094e9808 _dispatch_continuation_pop + 524
21 libdispatch.dylib 0x00000001094e8c88 _dispatch_async_redirect_invoke + 624
22 libdispatch.dylib 0x00000001094f8168 _dispatch_root_queue_drain + 376
23 libdispatch.dylib 0x00000001094f8a90 _dispatch_worker_thread2 + 156
24 libsystem_pthread.dylib 0x0000000181545f64 _pthread_wqthread + 212
25 libsystem_pthread.dylib 0x0000000181548ae0 start_wqthread + 8

[xujinhui]

#294 has fixed the issue. link-> #274