ios – [self.tableview reloadData];导致闪烁

我希望UI只在用户输入app时更新一次,因此我在ViewDidLoad中重新加载..这是代码..任何帮助如何消除这种闪烁…一些代码示例会有所帮助.

- (void)viewDidLoad { 

[super viewDidLoad];

self.myTableView.datasource = self;
self.myTableView.delegate = self;

PFQuery * getCollectionInfo = [PFQuery queryWithClassName:@"Collection"];   // make query

[getCollectionInfo orderByDescending:@"updatedAt"];
[getCollectionInfo setCachePolicy:kPFCachePolicyCacheThenNetwork];

dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0);
dispatch_async(queue,^{
    [getCollectionInfo findObjectsInBACkgroundWithBlock:^(NSArray *objects,NSError *error) {
        if (!error) {
            CollectionQueryResult = (NSMutableArray *)objects;
                [self.tableView reloadData];


            // whenevr get result
        }
        else{
            //no errors
        }


    }];
});