【feat】相册中选择照片时，刚进入照片album中，没有滚动到底部的偶现问题修复.

【影响范围】相册选择
【风险评估】低
【是否自测】是

TZImagePickerController/TZImagePickerController/TZPhotoPickerController.m

@@ -886,6 +886,7 @@ static CGFloat itemMargin = 5;
 - (void)prepareScrollCollectionViewToBottom {
     if (_shouldScrollToBottom && _models.count > 0) {
         // try fix #1562：https://github.com/banchichen/TZImagePickerController/issues/1562
+        /*
         if (@available(iOS 15.0, *)) {
             [_collectionView performBatchUpdates:^{} completion:^(BOOL finished) {
                 [self scrollCollectionViewToBottom];
@@ -895,6 +896,16 @@ static CGFloat itemMargin = 5;
                 [self scrollCollectionViewToBottom];
             });
         }
+        */
+        // iOS 15.6.1 - 凤梨手机相册没有滚动到底的问题。偶现的没有滚动到底部
+        __weak typeof(self) weakSelf = self;
+        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.03 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
+            [weakSelf.collectionView performBatchUpdates:^{
+                [weakSelf scrollCollectionViewToBottom];
+            } completion:^(BOOL finished) {
+                
+            }];
+        });
     } else {
         _collectionView.hidden = NO;
     }