How to use a SearchController.searchBar as a tableview.sectionHeader - ios

Question

question one :
when a SearchController.searchBar as a tableview.tableHeaderView, and tableview have backgroundColor
why it has a strange color: image
question two :
How to use a SearchController.searchBar as a tableview.sectionHeader
when i try do it, my tableView will be so crazy image
code snippet :
- (UISearchController *)searchController{
if (!_searchController) {
_searchController = [[UISearchController alloc] initWithSearchResultsController: self.resultVC];
_searchController.searchResultsUpdater = self;
_searchController.delegate = self;
self.definesPresentationContext = YES;
// 是否添加半透明覆盖
_searchController.dimsBackgroundDuringPresentation = YES;
// 是否隐藏导航栏
_searchController.hidesNavigationBarDuringPresentation = YES;
// 可以通过此种方式修改searchBar的背景颜色
_searchController.searchBar.barTintColor = GL_NAVBAR_COLOR;
UIImageView *barImageView = [[[_searchController.searchBar.subviews firstObject] subviews] firstObject];
barImageView.layer.borderColor = GL_NAVBAR_COLOR.CGColor;
barImageView.layer.borderWidth = 1;
// 可以通过此种方式可以拿到搜索框，修改搜索框的样式
UITextField *searchField = [[[_searchController.searchBar.subviews firstObject] subviews] lastObject];
searchField.backgroundColor = [UIColor yellowColor];
searchField.placeholder = #"请输入搜索内容";
}
return _searchController;
}
- (void)configureUI{
self.tableView = [[UITableView alloc] initWithFrame: self.view.bounds style:UITableViewStylePlain];
self.tableView.delegate = self;
self.tableView.dataSource = self;
[self.view addSubview: self.tableView];
self.tableView.backgroundColor = backgroundColor;
self.searchController.searchBar.frame = CGRectMake(0, 0, ScreenWidth, 44);
#if tableHeaderViewSearchBar
self.tableView.tableHeaderView = self.searchController.searchBar;
#endif
}
#if !tableHeaderViewSearchBar
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
return 50;
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
return self.searchController.searchBar;
}
#endif

Answer 1

You can place the UISearchBar of UISearchController in the navigation bar so that it remains fixed at the top.
So, just add below code at the end of configureUI method and remove last 2 lines of code inside the same method.
self.searchController.hidesNavigationBarDuringPresentation = NO;
self.searchController.searchBar.searchBarStyle = UISearchBarStyleMinimal;
self.navigationItem.titleView = self.searchController.searchBar;
self.definesPresentationContext = YES;

Answer 2

I have a provisional idea:
- (void)viewDidLoad {
[super viewDidLoad];
[self.searchController.searchBar sizeToFit];
self.tableView.frame.origin.y = CGRectGetMaxY(self.searchController.searchBar.frame);
[self.view addSubview: self.searchController.searchBar];
}
To answer question one: you need to set tableView.backgroundView
UIView *tableBackgroundView = [[UIView alloc]initWithFrame:self.tableView.bounds];
tableBackgroundView.backgroundColor = GL_BACKGROUD_COLOR;
self.tableView.backgroundView = tableBackgroundView;