效果图
搜索栏在开发中算是比较常见的了，而系统的searchbar很多人并不是很喜欢用，最近博主无意间看到一个系统的searchbar，觉得看着很漂亮，所以就自己来写写，其实设置placeholder，颜色，搜索logo，触发搜索操作都是存在的，看起来也很漂亮，以下是博主写的代码：
#import <UIKit/UIKit.h> @protocol SearchInputtingDelegate <NSObject> - (void)searchMyInput:(NSString *)inputStr; @end @interface ViewController : UIViewController @property(nonatomic,weak)id<SearchInputtingDelegate>delegate; @end .m #import "ViewController.h" #import "SearchResultViewController.h" @interface ViewController ()<UITableViewDelegate,UITableViewDataSource,UISearchBarDelegate> { UITableView *_tableView; UIBarButtonItem *_navRightButton; } @property (nonatomic, strong) SearchResultViewController *searchVC; @property (nonatomic, strong) UISearchController *searchController; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. // self.automaticallyAdjustsScrollViewInsets = NO; [self setHidesBottomBarWhenPushed:NO]; _tableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)]; _tableView.delegate = self; _tableView.dataSource = self; [self.view addSubview:_tableView]; [self initMySearchBar]; } /** * 初始化子视图 */ - (void) initMySearchBar { // 搜索页 _searchVC = [[SearchResultViewController alloc] init]; //遵守代理，用于后面传值 self.delegate = _searchVC; _searchController = [[UISearchController alloc] initWithSearchResultsController:_searchVC]; //设置后可以看到实时输入内容,可以在结果页的代理里面设置输入长度 [_searchController setSearchResultsUpdater: _searchVC]; [_searchController.searchBar setPlaceholder:@"搜索"]; [_searchController.searchBar setBarTintColor:[UIColor colorWithRed:0.95f green:0.95f blue:0.95f alpha:1.00f]]; //设置搜索logo [_searchController.searchBar setImage:[UIImage imageNamed:@"last.png"] forSearchBarIcon:UISearchBarIconSearch state:UIControlStateNormal]; [_searchController.searchBar sizeToFit]; [_searchController.searchBar setDelegate:self]; [_searchController.searchBar.layer setBorderWidth:0.5f]; [_searchController.searchBar.layer setBorderColor:[UIColor colorWithRed:220.0/255.0 green:220.0/255.0 blue:220.0/255.0 alpha:1.0].CGColor]; [_tableView setTableHeaderView:_searchController.searchBar]; _searchVC.searchVC = _searchController; __weak UISearchController *searchVC = _searchController; _searchVC.backBlock = ^(){ [searchVC dismissViewControllerAnimated:YES completion:nil]; searchVC.searchBar.text = @""; }; } - (void) navRightButtonDown { NSLog(@"---------------"); } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return 20; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { return 44; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"]; if (!cell) { cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"]; } cell.textLabel.text = [NSString stringWithFormat:@"第%ld行",(long)indexPath.row]; return cell; } #pragma mark - UISearchBarDelegate - (void) searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText { [self.tabBarController.tabBar setHidden:YES]; } - (void) searchBarCancelButtonClicked:(UISearchBar *)searchBar { //这里也可以不做取消操作，而是该用确认搜索的操作，使用.h中的代理把值传到搜索结果那里进行网络请求 [self.tabBarController.tabBar setHidden:NO]; NSLog(@"---------------Cancel"); } - (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar { NSLog(@"---------------%@",searchBar.text); if ([self.delegate respondsToSelector:@selector(searchMyInput:)]) { [self.delegate searchMyInput:searchBar.text]; } }
博主在这里用协议代理把输入内容传递到了结果页来进行操作，当然，也可以在当前页进行操作然后传到结果页进行展示，这里只是提供一种方式，并未限制别的写法。
结果页代码：
.h #import <UIKit/UIKit.h> #import "ViewController.h" @interface SearchResultViewController : UIViewController <UISearchResultsUpdating,SearchInputtingDelegate> @property(nonatomic,copy)void(^backBlock)(void); @property(nonatomic,strong)UISearchController *searchVC; @end .m #import "SearchResultViewController.h" @interface SearchResultViewController ()<UITableViewDelegate,UITableViewDataSource> { UITableView *_tableView; UIView *view; } @end @implementation SearchResultViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. self.automaticallyAdjustsScrollViewInsets = NO; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return 20; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { return 44; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"]; if (!cell) { cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"]; } cell.textLabel.text = [NSString stringWithFormat:@"第%ld条搜索数据",(long)indexPath.row]; return cell; } - (void) viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; [UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleDefault; } - (void) viewWillDisappear:(BOOL)animated { [super viewWillDisappear:animated]; [UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleLightContent; } #pragma mark - UISearchResultsUpdating - (void)updateSearchResultsForSearchController:(UISearchController *)searchController { NSString *searchText = searchController.searchBar.text; NSLog(@"%@", searchText); if (searchController.searchBar.text.length >15) { searchController.searchBar.text = [searchText substringToIndex:15]; } } #pragma mark - SearchInputtingDelegate - (void)searchMyInput:(NSString *)inputStr { NSLog(@"To Search My Inputthing"); self.view.backgroundColor = [UIColor whiteColor]; _tableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 64, self.view.bounds.size.width, self.view.bounds.size.height - 64)]; _tableView.alpha = 0; _tableView.delegate = self; _tableView.dataSource = self; [self.view addSubview:_tableView]; view = [[UIView alloc]initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 64)]; view.backgroundColor = [UIColor orangeColor]; view.alpha = 0; [self.view addSubview:view]; [self creatBackBtn]; [UIView animateWithDuration:1 animations:^{ self.searchVC.searchBar.hidden = YES; _tableView.alpha = 1; view.alpha = 1; }]; } - (void)creatBackBtn { UIButton *backbtn = [UIButton buttonWithType:UIButtonTypeSystem]; backbtn.frame = CGRectMake(0, 20, 60, 44); [backbtn setTitle:@"返回" forState:UIControlStateNormal]; [backbtn addTarget:self action:@selector(backAction) forControlEvents:UIControlEventTouchUpInside]; [view addSubview:backbtn]; } - (void)backAction { self.searchVC.searchBar.hidden = NO; [_tableView removeFromSuperview]; [view removeFromSuperview]; self.backBlock(); }
结果页展示后会看到nav依然为搜索框，点击取消后回来搜索前页面，这个个人感觉其实也没什么，如果觉得用户体验不好，那就隐藏掉搜索框好了，再定义一个nav，放一个按钮用于回到搜索前的界面,以上功能都已实现，代码如上，Demo下载地址：
https://github.com/codeliu6572/SearchController_Use
