self.searchController= [[UISearchController alloc] initWithSearchResultsController: nil];

[self.searchController.searchBar sizeToFit];

self.searchController.searchBar.backgroundImage= [UIImage createBgWithColor:[UIColor cyanColor]];

[self.searchController.searchBar setBackgroundImage:[UIImage createBgWithColor:[UIColor greenColor]] forBarPosition:UIBarPositionAny barMetrics:UIBarMetricsDefault];

self.searchController.searchBar.barTintColor = UIColorHex(f4f4f4);

self.searchController.delegate = self;

self.searchController.searchResultsUpdater = self;

self.searchController.dimsBackgroundDuringPresentation=NO;

self.definesPresentationContext=YES;

self.contactsTableView.tableHeaderView=self.searchController.searchBar;

初始狀態(tài)

進(jìn)入搜索狀態(tài)

當(dāng)設(shè)置成UIBarPositionBottom時,如圖

初始狀態(tài)

進(jìn)入搜索狀態(tài)

當(dāng)設(shè)置成UIBarPositionTop時,如圖

初始狀態(tài)

進(jìn)入搜索狀態(tài)

當(dāng)設(shè)置成UIBarPositionTopAttached時,如圖

初始狀態(tài)

進(jìn)入搜索狀態(tài)

--------------------------------------------------------------------------------------------------------------------------------------

self.searchBar= [[UISearchBaralloc]init];

_searchBar.tintColor=[UIColorblueColor];//解決光標(biāo)不顯示問題

_searchBar.delegate=self;

_searchBar.placeholder=@"搜索";

self.navigationItem.titleView=self.searchBar;

初始狀態(tài)

進(jìn)入搜索狀態(tài)

#pragma mark - UISearchBarDelegate Methods

- (BOOL)searchBarShouldBeginEditing:(UISearchBar*)searchBar{

NSLog(@"11--searchBarShouldBeginEditing");

returnYES;

}// return NO to not become first responder

- (void)searchBarTextDidBeginEditing:(UISearchBar*)searchBar{

NSLog(@"22--searchBarTextDidBeginEditing");

}// called when text starts editing

- (BOOL)searchBar:(UISearchBar*)searchBar shouldChangeTextInRange:(NSRange)range replacementText:(NSString*)text {

NSLog(@"33--shouldChangeTextInRange");

returnYES;

}// called before text changes

- (void)searchBar:(UISearchBar*)searchBar textDidChange:(NSString*)searchText{

NSLog(@"44--textDidChange");

}// called when text changes (including clear)

- (BOOL)searchBarShouldEndEditing:(UISearchBar*)searchBar{

NSLog(@"是否允許取消搜索--searchBarShouldEndEditing:%s",__func__);

returnYES;

}// return NO to not resign first responder

- (void)searchBarTextDidEndEditing:(UISearchBar*)searchBar{

NSLog(@"結(jié)束搜索searchBarTextDidEndEditing:%s",__func__);

}// called when text ends editing

- (void)searchBarSearchButtonClicked:(UISearchBar*)searchBar {

NSLog(@"鍵盤按鈕\"查找\"被點擊了searchBarSearchButtonClicked:%s",__func__);

}// called when keyboard search button pressed

- (void)searchBarBookmarkButtonClicked:(UISearchBar*)searchBar {

NSLog(@"鍵盤按鈕\"書簽\"被點擊了searchBarBookmarkButtonClicked:%s",__func__);

}// called when bookmark button pressed

- (void)searchBarCancelButtonClicked:(UISearchBar*)searchBar {

NSLog(@"鍵盤按鈕\"Cancel\"被點擊了searchBarCancelButtonClicked:%s",__func__);

}// called when cancel button pressed

- (void)searchBarResultsListButtonClicked:(UISearchBar*)searchBar {

NSLog(@"鍵盤按鈕\"ResultsList\"被點擊了searchBarResultsListButtonClicked:%s",__func__);

}// called when search results button pressed

- (void)searchBar:(UISearchBar*)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope {

NSLog(@"selectedScopeButtonIndexDidChange:%s",__func__);

}//告訴表格突梦，你選擇的是那個按鈕优训。