UISearchBar和UISearchDisplayController配合使用,是iOS8之前的使用方法,iOS8以后使用UISearchController,更方便简单。
遵守协议<UISearchControllerDelegate, UISearchBarDelegate, UISearchResultsUpdating>
@property(nonatomic,strong)UISearchController *searchController;
@property(nonatomic,strong)UITableView *searchResultTableView;
@property(nonatomic,strong)NSMutableArray *searchResultArray;
初始化控件searchController
- (UISearchController*)searchController {
if(!_searchController) {
_searchController= [[UISearchController alloc]initWithSearchResultsController:nil];
_searchController.searchResultsUpdater=self;
_searchController.searchBar.delegate=self;
_searchController.delegate=self;
_searchController.dimsBackgroundDuringPresentation=NO;//开始搜索时背景不显示
_searchController.hidesNavigationBarDuringPresentation=YES;//搜索时隐藏NavigationBar
//searchBar样式调整
_searchController.searchBar.tintColor= [YFRKitUtility colorFromHexString:@"0x3f75ff"];//设置searchBar按钮字体颜色
_searchController.searchBar.barTintColor= [YFRKitUtility colorFromHexString:@"0xEDEDF3"];//设置searchBar前景色
_searchController.searchBar.layer.borderColor= [YFRKitUtility colorFromHexString:@"0xEDEDF3"].CGColor;//searchBar边线颜色(为了掩藏黑线)
_searchController.searchBar.layer.borderWidth=0.5;
[_searchController.searchBar sizeToFit];
[_searchController.view addSubview:self.searchResultTableView];//把结果列表加在searchController的view上
self.definesPresentationContext=YES;//fix 显示问题
}
return_searchController;
}
初始化结果列表,添加在searchController的view上
- (UITableView*)searchResultTableView {
if(!_searchResultTableView) {
CGFloat width =_searchController.view.width;
CGFloat height =_searchController.view.height;
_searchResultTableView= [[UITableView alloc]initWithFrame:CGRectMake(0,64, width, height)style:UITableViewStylePlain];
_searchResultTableView.backgroundColor= [YFRKitUtility colorFromHexString:@"0xEDEDF3"];
_searchResultTableView.separatorStyle=UITableViewCellSeparatorStyleSingleLine;
_searchResultTableView.dataSource=self;
_searchResultTableView.delegate=self;
_searchResultTableView.tableFooterView= [UIView new];//无数据时不显示表格
}
return_searchResultTableView;
}
viewDidLoad代码
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationController.navigationBar.translucent=NO;//根据需要调整navigationBar
self.searchResultArray= [NSMutableArray array];//初始化数组
self.tableView.tableHeaderView=self.searchController.searchBar;//设置searchBar位置(self.tableView自行初始化)
self.edgesForExtendedLayout=UIRectEdgeNone;//解决跳转页面,返回后edgeInsets出错问题
}
viewWillDisappear代码
- (void)viewWillDisappear:(BOOL)animated {
[superviewWillDisappear:animated];
//页面跳转时根据需求设置active,不设置时可能需解决edgeInsets问题
if(_searchController.isActive) {
_searchController.active=NO;
[self.searchResultArray removeAllObjects];
if(_searchResultTableView) {[_searchResultTableView reloadData];}
}
}
UISearchViewController的代理回调
#pragma mark - UISearchResultsUpdating Delegate
//此方法只要searchBar有变化就会回调,包括刚开始(active)和结束(cancel),所以需在搜索执行方法中加非空判断,或者使用其他回调方法
- (void)updateSearchResultsForSearchController:(UISearchController*)searchController {
DebugLog(@"updateSearchResultsForSearchController:%@", searchController.searchBar.text);
[self searchDataWithKeyword:searchController.searchBar.text];
}
#pragma mark - UISearchBar Delegate
文本变化回调
- (void)searchBar:(UISearchBar*)searchBar textDidChange:(NSString*)searchText {
DebugLog(@"textDidChange:%@", searchText);
[self searchDataWithKeyword:searchText];
}
点击搜索按钮的回调
- (void)searchBarSearchButtonClicked:(UISearchBar*)searchBar {
DebugLog(@"searchBarSearchButtonClicked:%@", searchBar.text);
[self searchDataWithKeyword:searchBar.text];
}
点击取消的回调
- (void)searchBarCancelButtonClicked:(UISearchBar*)searchBar {
[self.searchResultArray removeAllObjects];
if(_searchResultTableView) {
[_searchResultTableView reloadData];
}}
搜索数据的方法
- (void)searchDataWithKeyword:(NSString*)keyword {
[self.searchResultArray removeAllObjects];//清空之前的数据
//网络请求或本地搜索
{//self.searchResultArray赋值并更新结果列表
[_searchResultTableView reloadData];
}}
解决tableView下拉刷新冲突
#pragma mark UIScrollViewDelegate
- (void)scrollViewDidScroll:(UIScrollView*)scrollView {
if(_searchController.isActive) {
return;}
...//下拉刷新代码
}
Tableview的回调:区分原始tableview和resultTableview
#pragma mark -- UITableViewDelegate
-(NSInteger)tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section{
if(_searchController.isActive) {//搜索结果
return [self.resultArray count];
}else{//原始tableview
return [self.dataSource count];
}}
- (CGFloat)tableView:(UITableView*)tableView heightForRowAtIndexPath:(NSIndexPath*)indexPath {
if(_searchController.isActive) {//搜索结果
return 44;
}else{//原始tableview
return 60;
}}
-(UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath{
staticNSString*identifier =@"";
UITableViewCell*cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if(!cell) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
if(_searchController.isActive) {//搜索结果
}else{//原始tableview}
returncell;}
-(void)tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
if(_searchController.isActive) {//搜索结果
}else{//原始tableview
}}