iOS8 UISearchViewController搜索功能讲解 分类： ios技术 2015-07-14 10:23 76人阅读 评论(0) 收藏

在iOS8以前我们实现搜索功能需要用到UISearchbar和UISearchDisplayController, 在iOS8之后呢, UISearchController配合UITableView的使用相比之下简单很多, 需要签订两个代理协议UISearchControllerDelegate, UISearchResultsUpdating.还有一个很重要的属性self.searchVC.active,,返回的BOOL如果为yes,UITableView的数据源应该为搜索后的数组即resultArray,
否则为原始数组即self.dataArray-------需要在UITableView的代理方法里做判断. 运行效果图如下:





具体代码如下:

.h文件

// ViewController.h

// SearchForChinese

// Created by Dong on 15/5/14.

// Copyright (c) 2015年 xindong. All rights reserved.

#import <UIKit/UIKit.h>

#import "ChinesePinyin/ChineseSorting.h"

@interface ViewController : UIViewController<UITableViewDelegate, UITableViewDataSource,UISearchControllerDelegate, UISearchResultsUpdating>

@property (nonatomic, strong) UITableView *tableView;

@property (nonatomic, strong) UISearchController *searchVC;

// 存放排好序的数据(汉字)

@property (nonatomic, strong) NSMutableDictionary *sectionDictionary;

// 存放汉字拼音大写首字母

@property (nonatomic, strong) NSArray *keyArray;

// 存放汉字(地名)

@property (nonatomic, strong) NSMutableArray *dataArray;

@end

.m文件

// ViewController.m

// SearchForChinese

// Created by Dong on 15/5/14.

// Copyright (c) 2015年 xindong. All rights reserved.

#import "ViewController.h"

#define WIDTH [UIScreen mainScreen].bounds.size.width

#define HEIGHT [UIScreen mainScreen].bounds.size.height

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0,
0, WIDTH, 64)];

label.backgroundColor = [UIColor greenColor];

label.text = @"\n搜搜";

label.numberOfLines = 0;

label.textAlignment = NSTextAlignmentCenter;

[self.view addSubview:label];

self.tableView = [[UITableView alloc] initWithFrame:CGRectMake(0,
64, WIDTH, HEIGHT)style:UITableViewStyleGrouped];

self.tableView.backgroundColor = [UIColor clearColor];

self.tableView.delegate = self;

self.tableView.dataSource = self;

[self.view addSubview:self.tableView];

// UISearchController初始化

self.searchVC = [[UISearchController alloc] initWithSearchResultsController:nil];

self.searchVC.searchResultsUpdater = self;

self.searchVC.delegate = self;

self.searchVC.searchBar.frame = CGRectMake(0,
100, WIDTH, 44);

self.searchVC.searchBar.barTintColor =
[UIColor yellowColor];

self.tableView.tableHeaderView = self.searchVC.searchBar;

// 设置为NO,可以点击搜索出来的内容

self.searchVC.dimsBackgroundDuringPresentation = NO;

// 原始数据

self.dataArray = [NSMutableArray arrayWithObjects:@"大兴", @"丰台", @"海淀", @"朝阳", @"东城", @"崇文", @"西城", @"石景山",@"通州", @"密云", @"迪拜", @"华仔", @"三胖子", @"大连", nil];

[self customSortingOfChinese:self.dataArray];

}

/*

**

**********************调用排序方法 (本人自己封装的方法, 下载地址:https://github.com/Tbwas/ChineseCharacterSorting)

*

**/

- (void)customSortingOfChinese:(NSMutableArray *)array

{

// 获取汉字拼音首字母

self.keyArray = [[ChineseSorting sharedInstance] firstCharcterSortingOfChinese:array];

// 将汉字排序

self.sectionDictionary = [NSMutableDictionary dictionary];

self.sectionDictionary = [[ChineseSorting sharedInstance] chineseCharacterSorting:arrayKeyArray:self.keyArray];

}

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

return self.keyArray.count;

}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

// 取每个section对应的数组

NSArray *arr = [self.sectionDictionary objectForKey:self.keyArray[section]];

return arr.count;

}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath

{

static NSString *str = @"cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:str];

if (!cell) {

cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:str];

}

NSArray *arr = [self.sectionDictionary objectForKey:self.keyArray[indexPath.section]];

cell.textLabel.text = arr[indexPath.row];

return cell;

}

// section的标题

-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section

{

return self.keyArray[section];

}

// 搜索界面将要出现

- (void)willPresentSearchController:(UISearchController *)searchController

{

NSLog(@"将要 开始 搜索时触发的方法");

}

// 搜索界面将要消失

-(void)willDismissSearchController:(UISearchController *)searchController

{

NSLog(@"将要 取消 搜索时触发的方法");

}

-(void)didDismissSearchController:(UISearchController *)searchController

{

[self customSortingOfChinese:self.dataArray];

[self.tableView reloadData];

}

#pragma mark -- 搜索方法

// 搜索时触发的方法

-(void)updateSearchResultsForSearchController:(UISearchController *)searchController

{

NSString *searchStr = [self.searchVC.searchBar text];

// 谓词

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS
%@", searchStr];

// 过滤数据

NSMutableArray *resultDataArray =
[NSMutableArray arrayWithArray:[self.dataArray filteredArrayUsingPredicate:predicate]];

// 调用地名排序的方法

[self customSortingOfChinese:resultDataArray];

// 刷新列表

[self.tableView reloadData];

}

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

{

UIAlertView *arlertView = [[UIAlertView alloc] initWithTitle:@"提示" message:@"表点啦"delegate:nil cancelButtonTitle:nil otherButtonTitles:@"听话", nil];

[arlertView show];

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end