IOS UI學習 UISearchController

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使用UISearchController 配合UITableView實現搜尋功能

  1 #import "ViewController12.h"  2   3 @interface ViewController12 () <UITableViewDataSource , UITableViewDelegate , UISearchResultsUpdating>  4   5 @end  6   7 @implementation ViewController12  8 {  9     UISearchController * _searchC;//SearchController 10     UITableView *_tableV; //tableView 11     NSMutableArray * _selectArr;//存放搜尋結果數組 12     NSMutableArray *_dataArr;//存放所有資料的數組 13 } 14 - (void)viewDidLoad 15 { 16     [super viewDidLoad]; 17     self.view.backgroundColor = [UIColor whiteColor]; 18     //是否根據按所在介面的navigationbar與tabbar的高度，自動調整scrollview的 inset,設定為no，讓它不要自動調整就 19     self.automaticallyAdjustsScrollViewInsets = NO; 20     [self createData]; 21     [self createTableView]; 22     _selectArr = [[NSMutableArray alloc] init]; 23 } 24  25  26 #pragma mark 建立資料 27 -(void)createData 28 { 29     if (!_dataArr) 30     { 31         _dataArr = [[NSMutableArray alloc] init]; 32     } 33      34     for (NSInteger i = 0; i<100; i++) 35     { 36         [_dataArr addObject:[NSString stringWithFormat:@"%ld",i]]; 37     } 38     NSLog(@"%@",_dataArr); 39 } 40  41 #pragma mark 建立 TableView  UISearchController 42 -(void)createTableView 43 { 44     _tableV = [[UITableView alloc] initWithFrame:CGRectMake(0, 64, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height-64-54)]; 45      46     _tableV.delegate = self; 47     _tableV.dataSource = self; 48     _searchC = [[UISearchController alloc] initWithSearchResultsController:nil]; 49  50      51     _searchC.hidesNavigationBarDuringPresentation = NO; 52     _searchC.dimsBackgroundDuringPresentation = YES; 53     //設定代理 54     _searchC.searchResultsUpdater = self; 55     //調整SearchBar尺寸為自適應 56     [_searchC.searchBar sizeToFit]; 57     //把SearchBar 給 TableView的標題 58     _tableV.tableHeaderView = _searchC.searchBar; 59     [self.view addSubview:_tableV]; 60  61 } 62  63  64  65  66 -(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView 67 { 68     return 1; 69 } 70 -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 71 { 72     //通過active屬性判斷是否搜尋 73     if (_searchC.active) 74     { 75         return _selectArr.count; 76     } 77     else 78         return _dataArr.count; 79 } 80  81 //設定儲存格 cell 82 -(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 83 { 84     static NSString * str = @"cell"; 85     UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:str]; 86     if (!cell) 87     { 88         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:str]; 89     } 90      91     if (_searchC.active) 92     { 93         cell.textLabel.text = _selectArr[indexPath.row]; 94     } 95     else 96     { 97         cell.textLabel.text = _dataArr[indexPath.row]; 98     } 99     return cell;100 }101 102 103 104 105 106 //執行搜尋107 -(void)updateSearchResultsForSearchController:(UISearchController *)searchController108 {109     NSString *searchString = [_searchC.searchBar text];110     NSPredicate *preicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[c] %@", searchString];111     if (_selectArr!= nil) {112         [_selectArr removeAllObjects];113     }114     //過濾資料115     _selectArr= [NSMutableArray arrayWithArray:[_dataArr filteredArrayUsingPredicate:preicate]];116     //重新整理表格117     [_tableV reloadData];118 }119 120 121 122 - (void)didReceiveMemoryWarning {123     [super didReceiveMemoryWarning];124     // Dispose of any resources that can be recreated.125 }126 127 @end

 

IOS UI學習 UISearchController