ios开发——添加搜索栏

//
//  ViewController.m
//  SearchbarTable
//


#import "ViewController.h"

@interface ViewController ()<UISearchBarDelegate,UISearchResultsUpdating>//实现两个协议

@property (strong,nonatomic) UISearchController *searchController;
//过滤后的数据
@property (strong,nonatomic) NSMutableArray *listFilterTeams;
//内容过滤方法
-(void)filterContentForSearchText:(NSString*)searchText scope:(NSUInteger)scope;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSString *plistPath = [[NSBundle mainBundle]pathForResource:@"team" ofType:@"plist"];//文件路径
    self.listTeams = [[NSArray alloc] initWithContentsOfFile:plistPath]; //文件数据数组
    
    //查询所有数据
    [self filterContentForSearchText:@"" scope:-1];
    
    //实例化UISearchController
    self.searchController = [[UISearchController alloc]initWithSearchResultsController:nil];
    //设置self为更新搜索结果对象
    self.searchController.dimsBackgroundDuringPresentation = FALSE;
    
    //设置搜索范围栏中的按钮
    self.searchController.searchBar.scopeButtonTitles = @[@"中文",@"英文"];
    self.searchController.searchBar.delegate = self;
    
    //将搜索栏放在表视图的表头中
    self.tableView.tableHeaderView = self.searchController.searchBar;
    [self.searchController.searchBar sizeToFit];
}


-(void)filterContentForSearchText:(NSString *)searchText scope:(NSUInteger)scope{
    if ([searchText length]==0) {
        self.listTeams = [NSMutableArray arrayWithArray:self.listTeams];
        return;
    }
    
    NSPredicate *scopePredicate;
    NSArray *tempArray;
    
    switch (scope) {
        case 0:
            scopePredicate = [NSPredicate predicateWithFormat:@"SELF.name contain[c] %@",searchText];
            tempArray = [self.listTeams filteredArrayUsingPredicate:scopePredicate];
            self.listFilterTeams = [NSMutableArray arrayWithArray:tempArray];
            break;
        case 1:
            scopePredicate = [NSPredicate predicateWithFormat:@"SELF.image contain[c] %@",searchText];
            tempArray = [self.listTeams filteredArrayUsingPredicate:scopePredicate];
            self.listFilterTeams = [NSMutableArray arrayWithArray:tempArray];
            break;
        default:
            self.listFilterTeams = [NSMutableArray arrayWithArray:self.listTeams];
            break;
    }
}

#pragma mark -- 实现UISearchBarDelegate协议方法
-(void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope{
    [self updateSearchResultsForSearchController:self.searchController];
}
#pragma mark -- 实现UISearchBarDelegate协议方法
-(void)updateSearchResultsForSearchController:(UISearchController *)searchController{
    NSString *searchString = searchController.searchBar.text;
    [self filterContentForSearchText:searchString scope:searchController.searchBar.selectedScopeButtonIndex];
    [self.tableView reloadData];
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
    
}

//返回某个节点的行数
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return [self.listTeams count];
}
//为单元格提供数
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    //只需要填写一个值@"CellIdentifier" ，这个值是之前自己设置的cell名称
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CellIdentifier" forIndexPath:indexPath];
    NSUInteger row = [indexPath row];//得到了数组的索引
    NSDictionary *rowDict = self.listTeams[row];//数组的索引就是字典
    cell.textLabel.text = rowDict[@"name"];//单元格的主标题文字
    cell.detailTextLabel.text = rowDict[@"image"];//单元格的辅标题文字
    //cell.textLabel.text = rowDict[@"image"];
    NSString *imagePath = [[NSString alloc] initWithFormat:@"%@.png",rowDict[@"image"]];//图片路径
    cell.imageView.image = [UIImage imageNamed:imagePath];//设置图片

    return cell;
}
@end