UISearchBar和UISearchDisplayController使用

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

@property(nonatomic,strong) UISearchBar *searchBar;

@property(nonatomic,strong) UISearchDisplayController *searchDisplayController;

@property(nonatomic,strong) NSMutableArray *searchResultArray;//搜索结果数组

初始化控件

#pragma mark - getter

- (UISearchBar*)searchBar {

if(!_searchBar) {

_searchBar= [[UISearchBar alloc]init];

_searchBar.delegate=self;

_searchBar.tintColor= [YFRUtility colorFromHexString:@"0x3f75ff"];//设置bar字体前景色

_searchBar.barTintColor= [YFRUtility colorFromHexString:@"0xEDEDF3"];//bar前景色

_searchBar.layer.borderColor= [YFRUtility colorFromHexString:@"0xEDEDF3"].CGColor;

_searchBar.layer.borderWidth=0.5;//为了掩饰黑线，加边框设置前景色同色

[_searchBar sizeToFit];

}

return _searchBar;

}

- (UISearchDisplayController*)searchDisplayController {

if(!_searchDisplayController) {

_searchDisplayController= [[UISearchDisplayController alloc]initWithSearchBar:self.searchBar contentsController:self];

_searchDisplayController.delegate=self;

_searchDisplayController.searchResultsDataSource=self;

_searchDisplayController.searchResultsDelegate=self;

_searchDisplayController.searchResultsTableView.tableFooterView= [UIView new];//无数据时不显示cell

}

return_searchDisplayController;

}

viewDidLoad代码

- (void)viewDidLoad {

[super viewDidLoad];

self.searchResultArray = [NSMutableArray array];

self.tableView.tableHeaderView = self.searchBar;

self.edgesForExtendedLayout=UIRectEdgeNone;//解决页面跳转时searchBar跳动问题

}

- (void)viewWillDisappear:(BOOL)animated {

[super viewWillDisappear:animated];

//跳转页面时searchDisplayController置为不活跃

if(_searchDisplayController.isActive) {

_searchDisplayController.active=NO;

}

}

实现UISearchBar的代理回调方法

#pragma mark - UISearchBar Delegate

//实时搜索

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

[self searchDataWithKeyword:searchText];//执行搜索代码

}

//点击搜索按钮

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

[self searchDataWithKeyword:searchBar.text];//执行搜索代码

}

//取消搜索

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

[self.searchResultArray removeAllObjects];//取消搜索清空result数组

}

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

[_searchDisplayController.searchResultsTableView reloadData];

}

}

//解决tableView下拉刷新冲突

#pragma mark UIScrollViewDelegate

- (void)scrollViewDidScroll:(UIScrollView*)scrollView {

if(_searchDisplayController.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(_searchDisplayController.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(_searchDisplayController.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(_searchDisplayController.isActive) {//搜索结果

}else{//原始tableview

}

returncell;

}

-(void)tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath{

[tableView deselectRowAtIndexPath:indexPath animated:YES];

if(_searchDisplayController.isActive) {//搜索结果

}else{//原始tableview

}

}