iOS 用UISearchController自定义搜索界面

现今，商城类项目、O2O项目一抓一大把，而它们都必不可少的功能，就是搜索功能，因为iOS8以后用UISearchController代替了UIsearchDisplayController，所以我专门用UISearchController写了一个搜索模板，希望可以帮到需要的朋友。

话不多少，直接上代码，都有注释的。

遵循代理方法

#import "ViewController.h"

@interface ViewController ()<UITableViewDelegate,UITableViewDataSource,UISearchBarDelegate,UISearchResultsUpdating>

@property (nonatomic,strong)UITableView *mainTable;

@property (nonatomic,strong)UISearchController *searchController;

@property (nonatomic,strong)NSMutableArray *dataList;
@property (nonatomic,strong)NSMutableArray *searchList;

@end

- (void)viewDidLoad {
[super viewDidLoad];

_dataList = [NSMutableArray arrayWithObjects:@"1",@"11",@"2",@"22",@"#",@"3",@"33",@"4",@"44",@"ff",@"a",@"aaa",@"555",@"666",nil];

[self searchControllerLayout];

}

-(void)searchControllerLayout{

self.mainTable = [[UITableView alloc]initWithFrame:self.view.bounds style:UITableViewStylePlain];

self.mainTable.delegate = self;
self.mainTable.dataSource = self;

[self.view addSubview:self.mainTable];

_searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
//    输入框提示
_searchController.searchBar.placeholder=@"请输入商品名或商铺名";
//    searchResultsUpdater协议代理
_searchController.searchResultsUpdater = self;
//    使之背景暗淡当陈述时
_searchController.dimsBackgroundDuringPresentation = NO;
//    隐藏导航栏
_searchController.hidesNavigationBarDuringPresentation = NO;
//
_searchController.searchBar.frame = CGRectMake(self.searchController.searchBar.frame.origin.x, self.searchController.searchBar.frame.origin.y, self.searchController.searchBar.frame.size.width, 44.0);
//   改变系统自带的“cancel”为“取消”
[self.searchController.searchBar setValue:@"取消" forKey:@"_cancelButtonText"];
//   表头视图为searchcontroller的searchbar
self.mainTable.tableHeaderView = self.searchController.searchBar;

}

实现代理方法

//设置区域的行数
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
if (self.searchController.active) {
return _searchList.count;
}else{
return _dataList.count;
}
}

//返回单元格内容
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

static NSString *identifier=@"cellFlag";
UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:identifier];

if (cell==nil) {
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
}

if (self.searchController.active) {

cell.textLabel.text = self.searchList[indexPath.row];
}
else{
cell.textLabel.text = self.dataList[indexPath.row];

}
return cell;
}

-(void)updateSearchResultsForSearchController:(UISearchController *)searchController {

NSString *searchString = [self.searchController.searchBar text];
//谓词过滤
NSPredicate *preicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[c] %@", searchString];
if (self.searchList!= nil) {
[self.searchList removeAllObjects];
}
//过滤数据
self.searchList= [NSMutableArray arrayWithArray:[_dataList filteredArrayUsingPredicate:preicate]];
//刷新表格
[self.mainTable reloadData];
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
if (self.searchController.active) {
NSLog(@"%@被选中",_searchList[indexPath.row]);
}else{
NSLog(@"%@被选中",_dataList[indexPath.row]);
}

}

实现效果如下：







如果有什么写的不对的，欢迎大家指正。