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
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
plist文件的添加
- - (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];
- }
- -(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;
- }
- -(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
- {
- NSString *key = [self.arrayData objectAtIndex:section];
- return key;
- }
运行下效果
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;
- }
附上源代码:http://download.youkuaiyun.com/detail/duxinfeng2010/4419302