用plist显示城市

没有点击索引的时候的效果图：

点击索引后的效果图：

代码：

RootViewController.h

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController
<UITableViewDelegate,UITableViewDataSource>
{
    UITableView * city;
    NSDictionary * dic;
}
@property(nonatomic,strong) NSArray * keyArray;
@end

RootViewController.m

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    //初始化界面
    [self initBackgroundView];

}
#pragma -mark -functions
-(void)initBackgroundView
{
    city = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, 320, 460-44) style:UITableViewStylePlain];
    city.delegate = self;
    city.dataSource = self;
    [self.view addSubview:city];

    dic = [[NSDictionary alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"citydict" ofType:@"plist"]];
    self.keyArray = [dic.allKeys sortedArrayUsingDescriptors:[NSArray arrayWithObjects:[NSSortDescriptor sortDescriptorWithKey:nil ascending:YES], nil]];
}
#pragma -mark -UITableViewDelegate
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return dic.count;
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    NSArray * array = [dic objectForKey:[self.keyArray objectAtIndex:section]];
    return array.count;
}

-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    return [self.keyArray objectAtIndex:section];
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:@"ID"];
    if(cell == nil){
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:@"ID"];
    }
    cell.textLabel.text = [[dic objectForKey:[self.keyArray objectAtIndex:indexPath.section]] objectAtIndex:indexPath.row];
    return cell;
}

-(NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
    return self.keyArray;
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSLog(@"---didSelectRowAtIndexPath--");
}