UI code don't run on main thread

[longhui.hu]

HRColorMapView.m

• (void)_init;
  at row: 184

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[_initializeQueue addOperationWithBlock:^{
     [self createColorMapLayer];   ---------------> this code may be have problem.
    dispatch_async(dispatch_get_main_queue(), ^{
                                                    (2) ------------> maybe code  here , there will run on main thread

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