iOS中 UISearchController 搜索栏 UI技术分享

<p style="margin-top: 0px; margin-bottom: 0px; font-size: 20px; font-family: 'STHeiti Light';"><span style="color:#ff0000;">UISearchController 继承自UIViewController</span></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 20px; font-family: 'STHeiti Light';"><span style="color:#ff0000;">    // 在iOS 8.0以上版本中, 我们可以使用UISearchController来非常方便地在UITableView中添加搜索框. 而在之前版本中, 我们还是必须使用UISearchBar + UISearchDisplayController的组合方式.</span></p>
#import "SearchViewController.h"
#define kTableCell @"tablecell"
@interface SearchViewController ()<UISearchResultsUpdating>
@property(nonatomic,retain)NSMutableArray *items;
@property(nonatomic,retain)UISearchController *searchController;
@property(nonatomic,retain)NSMutableArray *searchResults;//接收数据源结果
@end

懒加载及释放

@implementation SearchViewController

- (instancetype)init
{
    self = [super init];
    if (self) {
        }
    return self;
}
//懒加载
- (NSMutableArray *)items{
    if (!_items) {
        self.items = [NSMutableArray arrayWithCapacity:0];
    }
    return [[_items retain]autorelease];
}
//懒加载
- (NSMutableArray *)searchResults{
    if (!_searchResults) {
        self.searchResults = [NSMutableArray arrayWithCapacity:0];
    }
    return [[_searchResults retain]autorelease];
}
//释放
- (void)dealloc
{
    self.items = nil;
    self.searchResults = nil;
    self.searchController = nil;
    [super dealloc];
}

调用:

- (void)viewDidLoad {
    [super viewDidLoad];
    //导航栏
    [self p_navigationController];

    //调用初始化searchController
    [self setSearchControllerView];

    //注册
    [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:kTableCell];

}

初始化SearchController初始化

- (void)setSearchControllerView{
    self.searchController = [[UISearchController alloc]initWithSearchResultsController:nil];
    self.searchController.searchBar.frame = CGRectMake(0, 0, 0, 44);
    self.searchController.dimsBackgroundDuringPresentation = false;
    //搜索栏表头视图
    self.tableView.tableHeaderView = self.searchController.searchBar;
    [self.searchController.searchBar sizeToFit];
//背景颜色
    self.searchController.searchBar.backgroundColor = [UIColor orangeColor];
    self.searchController.searchResultsUpdater = self;

}

//引入UISearchController之后, UITableView的内容也要做相应地变动: 即cell中要呈现的内容是items, 还是searchResults.这一点, 可以通过UISearchController的active属性来判断, 即判断输入框是否处于active状态.

//UITableView相关的很多方法都要根据active来做判断:

配置导航条

- (void)p_navigationController{
    self.title = @"小韩哥-英雄列表";
    self.items = @[@"国服第一臭豆腐 No.1 Stinky Tofu CN.",
                   @"比尔吉沃特(Bill Ji walter)",
                   @"瓦洛兰 Valoran",
                   @"祖安 Zaun",
                   @"德玛西亚 Demacia",
                   @"诺克萨斯 Noxus",
                   @"艾欧尼亚 Ionia",
                   @"皮尔特沃夫 Piltover",
                   @"弗雷尔卓德 Freijord",
                   @"班德尔城 Bandle City",
                   @"无畏先锋",
                   @"战争学院 The Institute of War",
                   @"巨神峰",
                   @"雷瑟守备(JustThunder)",
                   @"裁决之地(JustRule)",
                   @"黑色玫瑰(Black Rose)",
                   @"暗影岛(Shadow island)",
                   @"钢铁烈阳(Steel fierce)",
                   @"恕瑞玛沙漠 Shurima Desert",
                   @"均衡教派(Balanced sect)",
                   @"水晶之痕(Crystal Scar)",
                   @"影流(Shadow Flow )",
                   @"守望之海(The Watchtower of sea)",
                   @"皮尔特沃夫",
                   @"征服之海",
                   @"扭曲丛林 Twisted Treeline",
                   @"教育网专区",
                   @"试炼之地 Proving Grounds",
                   @"卡拉曼达 Kalamanda",
                   @"蓝焰岛 Blue Flame Island",
                   @"哀嚎沼泽 Howling Marsh",
                   @"艾卡西亚 Icathia",
                   @"铁脊山脉 Ironspike Mountains",
                   @"库莽古丛林 Kumungu",
                   @"洛克法 Lokfar",
                   @"摩根小道 Morgon Pass",
                   @"塔尔贡山脉 Mountain Targon",
                   @"瘟疫丛林 Plague Jungles",
                   @"盘蛇河 Serpentine River",
                   @"厄尔提斯坦 Urtistan",
                   @"巫毒之地 Voodoo Lands",
                   @"咆哮深渊 Howling Abyss",
                   @"熔岩洞窟 Magma Chambers",
                   @"召唤师峡谷 Summoner's Rift",
                   @"九尾妖狐: 阿狸(Ahri)",
                   @"暗影之拳:阿卡丽(Akali)",
                   @"牛头酋长:阿利斯塔(Alistar)",
                   @"殇之木乃伊:阿木木(Amumu)",
                   @"冰晶凤凰:艾尼维亚(Anivia)",
                   @"黑暗之女:安妮(Annie)",
                   @"寒冰射手:艾希(Ashe)",
                   @"蒸汽机器人:布里茨(Blitzcrank)",
                   @"复仇焰魂:布兰德(Brand)",
                   @"皮城女警:凯特琳(Caitlyn)",
                   @"魔蛇之拥:卡西奥佩娅(Cassiopeia)",
                   @"虚空恐惧:科’加斯(ChoGath)",
                   @"英勇投弹手:库奇(Corki)",
                   @"诺克萨斯之手:德莱厄斯(Darius)",
                   @"皎月女神:黛安娜:(Diana)",
                   @"祖安狂人:蒙多医生(DrMundo)",
                   @"荣耀行刑官:德莱文(Delevin)",
                   @"蜘蛛女皇:伊莉斯(Elise)",
                   @"寡妇制造者:伊芙琳(Evelynn)",
                   @"探险家:伊泽瑞尔(Ezreal)",
                   @"末日使者:费德提克(Fiddlesticks)",
                   @"无双剑姬:剑姬(Fiora)",
                   @"潮汐海灵:菲兹(Fizz)",
                   @"哨兵之殇:加里奥(Galio)",
                   @"海洋之灾:普朗克(Gangplank)",
                   @"德玛西亚之力:盖伦(Garen)",
                   @"酒桶:古拉加斯(Gragas)",
                   @"法外狂徒:格雷福斯(Graves)",
                   @"战争之影:赫卡里姆 (Hecarim)",
                   @"大发明家:黑默丁格(Heimerdinger)",
                   @"刀锋意志:伊瑞利亚(Irelia)",
                   @"风暴之怒:迦娜(Janna)",
                   @"德玛西亚皇子:嘉文四世(JarvanⅣ)",
                   @"武器大师:贾克斯(Jax)",
                   @"未来守护者:杰斯(Jayce)",
                   @"天启者:卡尔玛(Karma)",
                   @"死亡颂唱者:卡尔萨斯(Karthus)",
                   @"虚空行者:卡萨丁(Kassadin)",
                   @"不详之刃:卡特琳娜(Katarina)",
                   @"审判天使:凯尔(Kayle)",
                   @"狂暴之心:凯南(Kennen)",
                   @"虚空掠夺者:卡’兹克(Khazix)",
                   @"深渊巨口:克格’莫(Kog Maw)",
                   @"诡术妖姬:乐芙兰(LeBlanc)",
                   @"盲僧:李青(Lee sin)",
                   @"曙光女神:蕾欧娜(Leona)",
                   @"仙灵女巫:璐璐(lulu)",
                   @"光辉女郎:拉克丝(Lux)",
                   @"熔岩巨兽:墨菲特(Malphite)",
                   @"虚空先知:玛尔扎哈(Malzahar)",
                   @"扭曲树精:茂凯(Maokai)",
                   @"无极剑圣:易(Yi)",
                   @"赏金猎人:厄运小姐(MissFortune)",
                   @"齐天大圣:孙悟空(Monkey king)",
                   @"金属大师:莫德凯撒(Mordekaiser)",
                   @"堕天使:莫甘娜(Morgana)",
                   @"唤潮鲛姬:娜美(Nami)",
                   @"沙漠死神:内瑟斯(Nasus)",
                   @"深海泰坦:诺提勒斯(Nautilus)",
                   @"狂野女猎手:奈德丽(Nidalee)",
                   @"永恒梦魇:魔腾(Nocturne)",
                   @"雪人骑士:努努(Nunu)",
                   @"狂战士:奥拉夫(Olaf)",
                   @"发条魔灵:奥莉安娜(Orianna)",
                   @"战争之王:潘森(Pantheon)",
                   @"钢铁大使:波比(Poopy)",
                   @"披甲龙龟:拉莫斯(Rammus)",
                   @"荒漠屠夫:雷克顿(Renekton)",
                   @"傲之追猎者:雷恩加尔(Rengar)",
                   @"放逐之刃:瑞文(Rivan)",
                   @"机械公敌:兰博(Rumble)",
                   @"流浪法师:瑞兹(Ryze)",
                   @"凛冬之怒:瑟庄妮:(Sejuani)",
                   @"恶魔小丑:萨科(Shaco)",
                   @"暮光之眼:慎(Shen)",
                   @"龙血武姬:希瓦娜(Shyvana)",
                   @"炼金术士:辛吉德(Singed)",
                   @"亡灵勇士:赛恩(Sion)",
                   @"战争女神:希维尔(Sivir)",
                   @"水晶先锋:斯卡纳(Skarner)",
                   @"琴瑟仙女:娑娜(Sona)",
                   @"众星之子:索拉卡(Soraka)",
                   @"策士统领:斯维因(Swain)",
                   @"暗黑元首:辛德拉(Syndra)",
                   @"刀锋之影:泰隆(Talon)",
                   @"宝石骑士:塔里克(Taric)",
                   @"迅捷斥候:提莫(Teemo)",
                   @"魂锁典狱长:锤石(Thresh)",
                   @"麦林炮手:崔丝塔娜(Tristana)",
                   @"诅咒巨魔:特兰德尔(Trundle)",
                   @"蛮族之王:泰达米尔(Tryndamere)",
                   @"卡牌大师:崔斯特(Twisted Fate)",
                   @"瘟疫之源:图奇(Twitch)",
                   @"野兽之灵:乌迪尔(Udyr)",
                   @"首领之傲:厄加特(Urgot)",
                   @"惩戒之箭:韦鲁斯(Varus)",
                   @"暗夜猎手:薇恩(Vayne)",
                   @"邪恶小法师:维伽(Veigar)",
                   @"皮城执法官:蔚(Vi)",
                   @"机械先驱:维克托(Viktor)",
                   @"猩红收割者:弗拉基米尔(Vladimir)",
                   @"雷霆咆哮:沃利贝尔(Volibear)",
                   @"嗜血猎手:沃里克(Warwick)",
                   @"远古巫灵:泽拉斯(Xerath)",
                   @"德邦总管:赵信(XinZhao)",
                   @"掘墓者:约里克(Yorick)",
                   @"影流之主:劫(Zed)",
                   @"爆破鬼才:吉格斯(Ziggs)",
                   @"时光守护者:基兰(Zilean)",
                   @"荆棘之兴:婕拉(Zyra)"].mutableCopy;
}

#pragma mark 协议中的方法

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

    [self.searchResults removeAllObjects];
    //NSPredicate 谓词
    NSPredicate *searchPredicate = [NSPredicate predicateWithFormat:@"self contains[cd] %@",searchController.searchBar.text];
    self.searchResults = [[self.items filteredArrayUsingPredicate:searchPredicate]mutableCopy];
    //刷新表格
    [self.tableView reloadData];

}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

    // Return the number of sections.
    return 1;
}

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

    return (!self.searchController.active) ? self.items.count : self.searchResults.count;
}

返回cell:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kTableCell forIndexPath:indexPath];

    if (cell == nil) {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:kTableCell];
    }

    if (indexPath.row > 0) {
        cell.imageView.frame = CGRectMake(60, 60, 10, 10);
        cell.imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%ld",indexPath.row + 43]];
        cell.textLabel.font = [UIFont systemFontOfSize:15];
    }
    cell.textLabel.text = (!self.searchController.active) ? self.items[indexPath.row] : self.searchResults[indexPath.row];

    return cell;
}

业务代理返回高:

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    if (indexPath.row == 0) {
        return 100  ;
    }else{
        return 80;
    }
}

最终效果:
iOS中 UISearchController 搜索栏 UI技术分享

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