数据为空增加判断

GMAILab/Classes/ToFace/ToFaceDoctorList/View/GMToFaceDoctorListNewHeaderView.m

@@ -50,7 +50,7 @@
     [self.collectView performBatchUpdates:^{
         [weakSelf.collectView layoutIfNeeded];
     } completion:^(BOOL finished) {
-        if (finished) {
+        if (finished && dataArray.count > 0) {
             NSIndexPath *firstIndexPath = [NSIndexPath indexPathForItem: 0 inSection:0];
             [self.collectView scrollToItemAtIndexPath:firstIndexPath atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:YES];
             _layout.currentIndex = 0;