本次实现的是表视图的分区和索引,代码和前面都差不多,主要还是代理方法的设计实现;
1.新建工程名为Partitation , File->New->Project ->single View Application -> next
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2.添加协议和声明变量
#import <UIKit/UIKit.h> @interface PartitionViewController : UIViewController <UITableViewDelegate,UITableViewDataSource> @property (strong,nonatomic) UITableView *partitationTableView; @property (strong,nonatomic) UITableViewCell *partitionTableViewCell; @property (strong,nonatomic) NSDictionary *dicData; @property (strong,nonatomic) NSArray *arrayData; @end
3.添加plist文件,再到ViewDidLoad中初始化视图
plist文件的添加
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![](http://dl.iteye.com/upload/attachment/0079/5237/11a28ba8-7f2b-321b-8a72-88a9ad478dcf.png)
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- (void)viewDidLoad { [super viewDidLoad]; UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)]; [self.view addSubview:navBar]; // Do any additional setup after loading the view, typically from a nib. self.partitationTableView = [[UITableView alloc] initWithFrame:self.view.frame style:UITableViewStyleGrouped]; self.partitationTableView.delegate=self; self.partitationTableView.dataSource = self; [self.view addSubview:self.partitationTableView]; [self.view addSubview:self.partitationTableView]; // 读取plist文件 NSBundle *bundle = [NSBundle mainBundle]; NSURL *plistURL = [bundle URLForResource:@"partitionInfo" withExtension:@"plist"]; NSDictionary *dictionary = [NSDictionary dictionaryWithContentsOfURL:plistURL]; self.dicData = dictionary; // 读取字典中的key储存数组中 NSArray *array = [self.dicData allKeys]; self.arrayData = array; }
4.实现委托方法
前面我们做的都是return 1,表示返回的是一个分区,现在是从数组中读取字典中的plist文件有几个分区
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return [self.arrayData count]; }
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { // 从数组中读取分区的对应的key NSString *stringDataKey = [self.arrayData objectAtIndex:section]; // 根据读取的key从该分区字典中读取数据元素 NSArray *arraySection = [self.dicData objectForKey:stringDataKey]; // 返回的是特定分区的行数 return [arraySection count]; }
根据索引路径获取分区行,需要使用哪个值在从字典中取出来
-(UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { NSInteger section = [indexPath section]; NSInteger row = [indexPath row]; NSString *key = [self.arrayData objectAtIndex:section]; NSArray *arraySection = [self.dicData objectForKey:key]; static NSString *partitation = @"partitation"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:partitation]; if (cell==nil) { cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:partitation]; } cell.textLabel.text = [arraySection objectAtIndex:row]; return cell; }
给每个分区指定可选标题值
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { NSString *key = [self.arrayData objectAtIndex:section]; return key; }
运行下效果
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![](http://dl.iteye.com/upload/attachment/0079/5239/6754dad2-e028-3124-8d65-0c9071c25967.png)
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5.添加索引,当我们查询的东西有几万条向下拖动表视图很显然比较麻烦,添加索引之后可以直接跳到所选的分区
-(NSArray*)sectionIndexTitlesForTableView:(UITableView *)tableView { return self.arrayData; }
运行效果
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![](http://dl.iteye.com/upload/attachment/0079/5241/114bad4e-8e47-3e4e-87fd-08e468c27bcb.png)
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