iphone - 如何显示搜索栏的取消按钮？

Question

当用户开始在搜索栏上编辑时，我想隐藏页面的导航栏，我还想显示取消按钮。
已完成，但当我调出 UISearchBar 时，我的取消按钮无法访问感谢大家。

- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar
{
    self.navigationController.navigationBar.hidden=TRUE;
    CGRect r=self.view.frame;
    r.origin.y=-44;
    r.size.height+=44;

    self.view.frame=r;

    searchBar.showsCancelButton=TRUE;

}

Answer 1

objective-c

- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar
{
    self.navigationController.navigationBar.hidden = TRUE;
    CGRect r = self.view.frame;
    r.origin.y = -44;
    r.size.height += 44;
    self.view.frame = r;

    [searchBar setShowsCancelButton:YES animated:YES];
}


-(void)searchBarTextDidEndEditing:(UISearchBar *)searchBar
{
    [searchBar setShowsCancelButton:NO animated:YES];
}

swift

func searchBarTextDidBeginEditing(searchBar: UISearchBar) {
    self.navigationController.navigationBar.hidden = true
    var r = self.view.frame
    r.origin.y = -44
    r.size.height += 44

    self.view.frame = r
    searchBar.setShowsCancelButton(true, animated: true)
}

func searchBarTextDidEndEditing(searchBar: UISearchBar) {
    searchBar.setShowsCancelButton(false, animated: true)
}