UIsearchbar show a line below it which never goes - ios

Question

I have a UISearchBar whose bartintcolor i have changed and have cancel enabled. This is added as a subview of a UIVew.
whenever make search bar visible, it shows a black line below it which never goes away.
Am i missing something about UISearchbar appearence or its background view.
dummyview=[[UIView alloc]initWithFrame:CGRectMake(10, 30,self.headerView.frame.size.width-20, 30)];
[dummyview setBackgroundColor:[UIColor redColor]];
[dummyview setClipsToBounds:TRUE];
self.searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, dummyview.frame.size.width, dummyview.frame.size.height)];
self.searchBar.delegate = (id)self;
[self.searchBar setPlaceholder:#"Search"];
self.searchBar.showsCancelButton = YES;
_searchBar.barTintColor = [Utilities colorWithHexString:#"3a7ebc"];
[[UIBarButtonItem appearanceWhenContainedIn: [UISearchBar class], nil] setTintColor:[UIColor whiteColor]];
_searchBar.delegate=self;
[dummyview addSubview:_searchBar];
it gives me like this
if i change background to native one, i get displaced content.
// _searchBar.barTintColor = [Utilities colorWithHexString:#"3a7ebc"];
I just dont want the black line below the searchbar.
Updated:
using
_searchBar.searchBarStyle=UISearchBarStyleMinimal;
_searchBar.barStyle=UIBarStyleDefault;
result in this
So
finally everything done
_searchBar.searchBarStyle=UISearchBarStyleMinimal;
_searchBar.barStyle=UIBarStyleDefault;
UITextField *searchField=[_searchBar valueForKey:#"_searchField"];
if (searchField) {
[searchField setTextColor:[UIColor whiteColor]];
}

Answer 1

Put my code in viewdidload or viewwillappear method.
searchbar.barTintColor=[UIColor samebgcolor];
searchbar.layer.borderWidth = 1;
searchbar.layer.borderColor = [[UIColor samebgcolor] CGColor];
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