本文實例為大家分享了tableview實現搜索功能的具體代碼，供大家參考，具體內容如下
一、先用xcode創建好工程
通過xib文件來初始化視圖控制器
二、編寫代碼
1、先為nsdictionary創建一個分類 實現字典的深拷貝
.h文件
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#import <foundation/foundation.h>@interface nsdictionary (mutabledeepcopy)- (nsmutabledictionary *)mutabledeepcopy;@end |
.m文件
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#import "nsdictionary+mutabledeepcopy.h"@implementation nsdictionary (mutabledeepcopy)- (nsmutabledictionary *)mutabledeepcopy{ nsmutabledictionary *mutabledictionary = [nsmutabledictionary dictionarywithcapacity:[self count]]; //這里的容量也只是個參考值,表示對大小的限制 大小是調用該方法的count nsarray *keys = [self allkeys]; //self就是個可變的字典 for(id key in keys) { id dicvalue = [self valueforkey:key]; //從 nsdictionary 取值的時候有兩個方法objectforkey valueforkey id diccopy = nil; if([dicvalue respondstoselector:@selector(mutabledeepcopy)]) //如果對象沒有響應mutabledeepcopy 就創建一個可變副本 dicvalue 有沒有實現這個方法 { diccopy = [dicvalue mutabledeepcopy]; } else if([dicvalue respondstoselector:@selector(mutablecopy)]) { diccopy = [dicvalue mutablecopy]; } if(diccopy ==nil) { diccopy = [dicvalue copy]; } [mutabledictionary setvalue:diccopy forkey:key]; } return mutabledictionary;}@end |
2、編寫主代碼
.h文件
notescanviewcontroller.h
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#import <uikit/uikit.h>@interface notescanviewcontroller : uiviewcontroller <uitableviewdatasource,uitableviewdelegate,uisearchbardelegate>@property (nonatomic,retain)nsmutabledictionary *words;@property (nonatomic,retain)nsmutablearray *keys;@property (weak, nonatomic) iboutlet uitableview *table;@property (weak, nonatomic) iboutlet uisearchbar *search;@property (nonatomic,retain)nsdictionary *allwords;- (void)resetsearch;- (void)handlesearchforterm:(nsstring *)searchterm;@end |
.m文件
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#import "notescanviewcontroller.h"#import "nsdictionary+mutabledeepcopy.h"@interface notescanviewcontroller ()@end@implementation notescanviewcontroller- (id)initwithnibname:(nsstring *)nibnameornil bundle:(nsbundle *)nibbundleornil{ self = [super initwithnibname:nibnameornil bundle:nibbundleornil]; if (self) { // custom initialization } return self;}- (void)viewdidload //只在第一次加載視圖調用{ [super viewdidload]; /*加載plist文件*/ nsstring *wordspath = [[nsbundle mainbundle]pathforresource:@"notesection" oftype:@"plist"];//得到屬性列表的路徑 nsdictionary *dictionary = [[nsdictionary alloc]initwithcontentsoffile:wordspath]; self.allwords = dictionary; [self resetsearch]; //加載并填充words可變字典和keys數組 _search.autocapitalizationtype = uitextautocapitalizationtypenone;//不自動大寫 _search.autocorrectiontype = uitextautocorrectiontypeno;//不自動糾錯}//取消搜索或者改變搜索條件- (void)resetsearch{ self.words = [self.allwords mutabledeepcopy]; //得到所有字典的副本 得到一個字典 nslog(@"所有字典 = %@",self.words); nsmutablearray *keyarray = [[nsmutablearray alloc]init];//創建一個可變數組 [keyarray addobjectsfromarray:[[self.allwords allkeys]sortedarrayusingselector:@selector(compare:)]]; //用指定的selector對array的元素進行排序 self.keys = keyarray; //將所有key 存到一個數組里面 nslog(@"所有key = %@",self.keys);}//實現搜索方法- (void)handlesearchforterm:(nsstring *)searchterm{ nsmutablearray *sectionsremove = [[nsmutablearray alloc]init]; //創建一個數組存放我們所找到的空分區 [self resetsearch]; for(nsstring *key in self.keys)//遍歷所有的key { nsmutablearray *array = [_words valueforkey:key] ; //得到當前鍵key的名稱 數組 nsmutablearray *toremove = [[nsmutablearray alloc]init];//需要從words中刪除的值 數組 for(nsstring *word in array) //實現搜索 { if([word rangeofstring:searchterm options:nscaseinsensitivesearch].location == nsnotfound)//搜索時忽略大小寫 把沒有搜到的值 放到要刪除的對象數組中去 [toremove addobject:word]; //把沒有搜到的內容放到 toremove中去 } if([array count] == [toremove count])//校對要刪除的名稱數組長度和名稱數組長度是否相等 [sectionsremove addobject:key]; //相等 則整個分區組為空 [array removeobjectsinarray:toremove]; //否則 刪除數組中所有與數組toremove包含相同的元素 } [self.keys removeobjectsinarray:sectionsremove];// 刪除整個key 也就是刪除空分區，釋放用來存儲分區的數組，并重新加載table 這樣就實現了搜索 [_table reloaddata];}- (void)viewwillappear:(bool)animated //當使用push或者prenset方式調用{}//#pragma mark -- (nsinteger)numberofsectionsintableview:(uitableview *)tableview{ return ([_keys count] >0)?[_keys count]:1; //搜索時可能會刪除所有分區 則要保證要有一個分區}- (nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section{ if([_keys count] == 0) { return 0; } nsstring *key = [_keys objectatindex:section]; //得到第幾組的key nsarray *wordsection = [_words objectforkey:key]; //得到這個key里面所有的元素 return [wordsection count]; //返回元素的個數}- (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath{ nsuinteger section = [indexpath section]; //得到第幾組 nsuinteger row = [indexpath row]; //得到第幾行 nsstring *key = [_keys objectatindex:section]; //得到第幾組的key nsarray *wordsection = [_words objectforkey:key]; //得到這個key里面的所有元素 static nsstring *notesectionidentifier = @"notesectionidentifier"; uitableviewcell *cell =[tableview dequeuereusablecellwithidentifier:notesectionidentifier]; if(cell == nil) { cell = [[uitableviewcell alloc]initwithstyle:uitableviewcellstyledefault reuseidentifier:notesectionidentifier]; } cell.textlabel.text = [wordsection objectatindex:row]; return cell;}//為每個分區指定一個標題- (nsstring *)tableview:(uitableview *)tableview titleforheaderinsection:(nsinteger)section{ if([_keys count] == 0) return @" "; nsstring *key = [_keys objectatindex:section]; return key;}//創建一個索引表- (nsarray *)sectionindextitlesfortableview:(uitableview *)tableview{ return _keys;}#pragma mark - - (nsindexpath *)tableview:(uitableview *)tableview willselectrowatindexpath:(nsindexpath *)indexpath{ [_search resignfirstresponder]; //點擊任意 cell都會取消鍵盤 return indexpath;}#pragma mark-- (void)searchbarsearchbuttonclicked:(uisearchbar *)searchbar //搜索button點擊事件{ nsstring *searchterm = [searchbar text]; [self handlesearchforterm:searchterm]; //搜索內容 刪除words里面的空分區和不匹配內容}- (void)searchbar:(uisearchbar *)searchbar textdidchange:(nsstring *)searchtext{ //搜索內容隨著輸入及時地顯示出來 if([searchtext length] == 0) { [self resetsearch]; [_table reloaddata]; return; } else [self handlesearchforterm:searchtext];}- (void)searchbarcancelbuttonclicked:(uisearchbar *)searchbar //點擊取消按鈕{ _search.text = @""; //標題 為空 [self resetsearch]; //重新 加載分類數據 [_table reloaddata]; [searchbar resignfirstresponder]; //退出鍵盤}@end |
運行結果
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：http://blog.csdn.net/itpeng523/article/details/23035679
