搜索框联想功能实现
【搜索框联想功能实现】http://www.tuicool.com/articles/vQ7Z3qu
#import "GHSearchController.h"@interface GHSearchController () @property (nonatomic, strong) UISearchController *searchVC;
@property (nonatomic ,strong)UITableView *demoTableView;
@property (nonatomic ,strong) NSMutableArray *exampleArr;
@property (nonatomic ,strong)NSMutableArray *searchArr;
@end@implementation GHSearchController
#pragma mark - 懒加载
- (UISearchController *)searchVC
{
if (!_searchVC) {_searchVC = [[UISearchController alloc] initWithSearchResultsController:nil];
_searchVC.searchResultsUpdater = self;
_searchVC.dimsBackgroundDuringPresentation = NO;
_searchVC.hidesNavigationBarDuringPresentation = NO;
_searchVC.searchBar.frame = CGRectMake(self.searchVC.searchBar.frame.origin.x, self.searchVC.searchBar.frame.origin.y, self.searchVC.searchBar.frame.size.width, 44.0);
self.demoTableView.tableHeaderView = self.searchVC.searchBar;
}
return _searchVC;
}- (NSMutableArray *)exampleArr
{
if (!_exampleArr) {}
return _exampleArr;
}- (UITableView *)demoTableView
{
if (!_demoTableView) {
_demoTableView = [[UITableView alloc] init];
_demoTableView.dataSource = self;
}
return _demoTableView;
}#pragma mark - view
- (void)viewDidLoad
{
[super viewDidLoad];
self.view = self.demoTableView;
_exampleArr = [NSMutableArray arrayWithCapacity:200];
CGRect rectStatus = [[UIApplication sharedApplication] statusBarFrame];
self.demoTableView.frame = CGRectMake(0, rectStatus.size.height, self.view.frame.size.width, self.view.frame.size.height - rectStatus.size.height);
//self.searchBar.frame = CGRectMake(0, rectStatus.size.height, self.view.frame.size.width, 50.0);
for (int i = 0;
i < 200;
i ++) {
int NUMBER_OF_CHARS = 5;
char data[NUMBER_OF_CHARS];
//生成一个五位数的字符串
for (int x=0;
x<10;
data[x++] = (char)('A' + (arc4random_uniform(26))));
NSString *string = [[NSString alloc] initWithBytes:data length:5 encoding:NSUTF8StringEncoding];
//随机给字符串赋值
[_exampleArr addObject:string];
} // 随机生成200个五位数的字符串
}- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath//cell
{
static NSString *identify = @"cellIdentify";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identify];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identify];
}
if (!self.searchVC.active) {
cell.textLabel.text = [NSString stringWithFormat:@"%@",_exampleArr[indexPath.row]];
}else
{
cell.textLabel.text = [NSString stringWithFormat:@"%@",_searchArr[indexPath.row]];
}
return cell;
}- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (self.searchVC.active) {
return self.searchArr.count;
//搜索结果
}else
{
return self.exampleArr.count;
//原始数据
}
}- (void)updateSearchResultsForSearchController:(UISearchController *)searchController
{
NSString *searchString = [self.searchVC.searchBar text];
NSPredicate *preicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[c] %@", searchString];
if (self.searchArr!= nil) {
[self.searchArr removeAllObjects];
}
//过滤数据
self.searchArr = [NSMutableArray arrayWithArray:[_exampleArr filteredArrayUsingPredicate:preicate]];
//刷新表格
[self.demoTableView reloadData];
}
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