IOS 课程 UITable 学习（二）

按照UITable学习一中，继续往下开发。使用的资料在UITable学习一中。

具体代码如下：

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UITableViewDataSource,UITableViewDelegate>
@property(retain) NSDictionary * names;
@property (retain) NSArray * keys;
@end

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
    //文件路径
    NSString *path = [[NSBundle mainBundle]pathForResource:@"sortednames" ofType:@"plist"];
    
    NSDictionary *dict = [[NSDictionary alloc]initWithContentsOfFile:path];
    self.names = dict;
    [dict release];
    
    //获得字典关键字数组，然后排序，其中compare方法是字典中的key的compare方法
    NSArray *array  = [[self.names  allKeys]sortedArrayUsingSelector:@selector(compare:)];
    self.keys = array;    
    
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
//-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{
//    return TRUE;
//}
//设置多少个分区
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    //按照关键字分区，关键字个数也是分区个数
    return [self.keys count];
}

//每种分区有多少数据
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    //根据分区序号，找到关键字
    NSString *key = [self.keys objectAtIndex:section];
    //在字典中找到所有的关键字为key的名字,放到一个数组中
    NSArray *nameSection = [self.names objectForKey:key];
    //数组中元素的个数
    return [nameSection count];

}
//设置每行的数据
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *idt = @"sectionTableIndentifier";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:idt];
    if(cell == nil){
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:idt];
    }
    
    NSUInteger section = [indexPath section];
    NSUInteger row = [indexPath row];
    NSString *key = [self.keys objectAtIndex:section];
    NSArray *nameSection = [self.names objectForKey:key];
    
    cell.textLabel.text = [nameSection objectAtIndex:row];
    return cell;

}
//返回每个分区的标题
-(NSString*)tableView:(UITableView*) tableView titleForHeaderInSection:(NSInteger)section{
    NSString *key = [self.keys objectAtIndex:section];
    return key;
}
//添加索引
-(NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView{
    return self.keys;
}
@end