与UISearchBar的stange行为UIRefreshControl

Question

我正在使用UIRefreshControl与UISearchBar当我拉动刷新时我看到uiviewcontroller顶部的白色背景

   UISearchBar *searchBar =
[[UISearchBar alloc] initWithFrame:
 CGRectMake(0, 0, self.tableView.frame.size.width, 44.0)];
searchBar.autocorrectionType = UITextAutocorrectionTypeNo;
self.tableView.tableHeaderView = searchBar;

 _refreshControl = [[UIRefreshControl alloc] init];
[_refreshControl addTarget:self action:@selector(update) forControlEvents:UIControlEventValueChanged];
[self.tableView addSubview:_refreshControl];

问题是上面的白色背景

有任何想法吗？

Answer 1

为表创建一个背景视图,并将其颜色设置为clearColor,如下所示

- (void)viewDidLoad {
    self.tableView.backgroundView = [UIView new];
    self.tableView.backgroundView.backgroundColor = [UIColor clearColor];
}