iOS tableview（ios listview）

本文实例为大家分享了tableview实现搜索功能的具体代码，供大家参考，具体内容如下

一、先用xcode创建好工程

通过xib文件来初始化视图控制器

iOS tableview（ios listview）

二、编写代码

1、先为nsdictionary创建一个分类实现字典的深拷贝

.h文件

1 2 3 4 5 6 #import <foundation/foundation.h> @interface nsdictionary (mutabledeepcopy) - (nsmutabledictionary *)mutabledeepcopy; @end

.m文件

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 #import "nsdictionary+mutabledeepcopy.h" @implementation nsdictionary (mutabledeepcopy) - (nsmutabledictionary *)mutabledeepcopy { nsmutabledictionary *mutabledictionary = [nsmutabledictionary dictionarywithcapacity:[self count]]; //这里的容量也只是个参考值,表示对大小的限制大小是调用该方法的count nsarray *keys = [self allkeys]; //self就是个可变的字典 for(id key in keys) { id dicvalue = [self valueforkey:key]; //从 nsdictionary 取值的时候有两个方法objectforkey valueforkey id diccopy = nil; if([dicvalue respondstoselector:@selector(mutabledeepcopy)]) //如果对象没有响应mutabledeepcopy 就创建一个可变副本 dicvalue 有没有实现这个方法 { 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、编写主代码

.h文件
notescanviewcontroller.h

1 2 3 4 5 6 7 8 9 10 11 12 13 14 #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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 #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 //只在第一次加载视图调用 { [super viewdidload]; /*加载plist文件*/ nsstring *wordspath = [[nsbundle mainbundle]pathforresource:@"notesection" oftype:@"plist"];//得到属性列表的路径 nsdictionary *dictionary = [[nsdictionary alloc]initwithcontentsoffile:wordspath]; self.allwords = dictionary; [self resetsearch]; //加载并填充words可变字典和keys数组 _search.autocapitalizationtype = uitextautocapitalizationtypenone;//不自动大写 _search.autocorrectiontype = uitextautocorrectiontypeno;//不自动纠错 } //取消搜索或者改变搜索条件 - (void)resetsearch { self.words = [self.allwords mutabledeepcopy]; //得到所有字典的副本得到一个字典 nslog(@"所有字典 = %@",self.words); nsmutablearray *keyarray = [[nsmutablearray alloc]init];//创建一个可变数组 [keyarray addobjectsfromarray:[[self.allwords allkeys]sortedarrayusingselector:@selector(compare:)]]; //用指定的selector对array的元素进行排序 self.keys = keyarray; //将所有key 存到一个数组里面 nslog(@"所有key = %@",self.keys); } //实现搜索方法 - (void)handlesearchforterm:(nsstring *)searchterm { nsmutablearray *sectionsremove = [[nsmutablearray alloc]init]; //创建一个数组存放我们所找到的空分区 [self resetsearch]; for(nsstring *key in self.keys)//遍历所有的key { nsmutablearray *array = [_words valueforkey:key] ; //得到当前键key的名称数组 nsmutablearray *toremove = [[nsmutablearray alloc]init];//需要从words中删除的值数组 for(nsstring *word in array) //实现搜索 { if([word rangeofstring:searchterm options:nscaseinsensitivesearch].location == nsnotfound)//搜索时忽略大小写把没有搜到的值放到要删除的对象数组中去 [toremove addobject:word]; //把没有搜到的内容放到 toremove中去 } if([array count] == [toremove count])//校对要删除的名称数组长度和名称数组长度是否相等 [sectionsremove addobject:key]; //相等则整个分区组为空 [array removeobjectsinarray:toremove]; //否则删除数组中所有与数组toremove包含相同的元素 } [self.keys removeobjectsinarray:sectionsremove];// 删除整个key 也就是删除空分区，释放用来存储分区的数组，并重新加载table 这样就实现了搜索 [_table reloaddata]; } - (void)viewwillappear:(bool)animated //当使用push或者prenset方式调用 { } //#pragma mark - - (nsinteger)numberofsectionsintableview:(uitableview *)tableview { return ([_keys count] >0)?[_keys count]:1; //搜索时可能会删除所有分区则要保证要有一个分区 } - (nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section { if([_keys count] == 0) { return 0; } nsstring *key = [_keys objectatindex:section]; //得到第几组的key nsarray *wordsection = [_words objectforkey:key]; //得到这个key里面所有的元素 return [wordsection count]; //返回元素的个数 } - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath { nsuinteger section = [indexpath section]; //得到第几组 nsuinteger row = [indexpath row]; //得到第几行 nsstring *key = [_keys objectatindex:section]; //得到第几组的key nsarray *wordsection = [_words objectforkey:key]; //得到这个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; } //为每个分区指定一个标题 - (nsstring *)tableview:(uitableview *)tableview titleforheaderinsection:(nsinteger)section { if([_keys count] == 0) return @" "; nsstring *key = [_keys objectatindex:section]; return key; } //创建一个索引表 - (nsarray *)sectionindextitlesfortableview:(uitableview *)tableview { return _keys; } #pragma mark - - (nsindexpath *)tableview:(uitableview *)tableview willselectrowatindexpath:(nsindexpath *)indexpath { [_search resignfirstresponder]; //点击任意 cell都会取消键盘 return indexpath; } #pragma mark- - (void)searchbarsearchbuttonclicked:(uisearchbar *)searchbar //搜索button点击事件 { nsstring *searchterm = [searchbar text]; [self handlesearchforterm:searchterm]; //搜索内容删除words里面的空分区和不匹配内容 } - (void)searchbar:(uisearchbar *)searchbar textdidchange:(nsstring *)searchtext { //搜索内容随着输入及时地显示出来 if([searchtext length] == 0) { [self resetsearch]; [_table reloaddata]; return; } else [self handlesearchforterm:searchtext]; } - (void)searchbarcancelbuttonclicked:(uisearchbar *)searchbar //点击取消按钮 { _search.text = @""; //标题为空 [self resetsearch]; //重新加载分类数据 [_table reloaddata]; [searchbar resignfirstresponder]; //退出键盘 } @end