手机通讯录的实现

<pre name="code" class="objc">首先重写UITableViewCell的初始化方法:

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        // Initialization code
        self.photoView = [[UIImageView alloc] initWithFrame:CGRectMake(20, 5, 80, 80)];
        _photoView.layer.cornerRadius = 40;
        _photoView.layer.masksToBounds = YES;
        [self.contentView addSubview:_photoView];
        [_photoView release];
        
        self.nameLabel = [[UILabel alloc] initWithFrame:CGRectMake(120, 5, 60, 35)];
        [self.contentView addSubview:_nameLabel];
        [_nameLabel release];
        
        self.ageLabel = [[UILabel alloc] initWithFrame:CGRectMake(200, 5, 40, 35)];
        [self.contentView addSubview:_ageLabel];
        [_ageLabel release];
        
        self.genderLabel = [[UILabel alloc] initWithFrame:CGRectMake(260, 5, 40, 35)];
        [self.contentView addSubview:_genderLabel];
        [_genderLabel release];
        
        self.phoneNumberLabel = [[UILabel alloc] initWithFrame:CGRectMake(120, 50, 200, 35)];
        [self.contentView addSubview:_phoneNumberLabel];
        [_phoneNumberLabel release];
    }
    return self;
}

@interface RootViewController ()<UITableViewDataSource,UITableViewDelegate>

@property (nonatomic, retain) NSDictionary *dic;
@property (nonatomic, retain) NSArray *titles;
@end

@implementation RootViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
        self.dic =  [self readDataFromPlist];
        self.titles = [[self.dic allKeys] sortedArrayUsingSelector:@selector(compare:)];
    }
    return self;
}

- (NSDictionary *)readDataFromPlist
{
    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"AddressBook-2" ofType:@"plist"];
    NSDictionary *dic = [NSDictionary dictionaryWithContentsOfFile:filePath];
    return dic;
}

- (void)loadView
{
    UITableView *tableView = [[UITableView alloc] initWithFrame:[UIScreen mainScreen].bounds style:UITableViewStylePlain];
    tableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine;
    tableView.separatorColor = [UIColor lightGrayColor];
    tableView.dataSource = self;
    tableView.delegate = self;
    tableView.rowHeight = 90;
    self.view = tableView;
    [tableView release];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.navigationItem.title = @"所有联系人";
}

#pragma mark - UITableViewDataSource
//设置行数
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.dic[self.titles[section]] count];
}

//创建cell
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *identifier = @"mark";
    StudentCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    if (!cell) {
        cell = [[[StudentCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier] autorelease];
    }
    NSDictionary *dic = self.dic[self.titles [indexPath.section]][indexPath.row];
    cell.photoView.image = [UIImage imageNamed:[dic objectForKey:@"imageName"]];
    cell.nameLabel.text = [self.dic[self.titles [indexPath.section]][indexPath.row] objectForKey:@"name"];
    cell.ageLabel.text = [self.dic[self.titles [indexPath.section]][indexPath.row] objectForKey:@"age"];
    cell.genderLabel.text = [self.dic[self.titles [indexPath.section]][indexPath.row] objectForKey:@"gender"];
    cell.phoneNumberLabel.text = [self.dic[self.titles [indexPath.section]][indexPath.row] objectForKey:@"phoneNumber"];
    return cell;
}

//设置分区
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return [self.titles count];
}

//页眉
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    return self.titles[section];
}

//索引值
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
    return self.titles;
}

#pragma mark - UITableViewDelegate
//当cell被选中时触发
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *str = [self.dic[self.titles [indexPath.section]][indexPath.row] objectForKey:@"phoneNumber"];
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:[NSString stringWithFormat:@"tel://%@",str]]];
    //2、用UIWebView来实现，打电话结束后会返回当前应用程序：
    UIWebView *callPhoneWebVw = [[UIWebView alloc] init];
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"tell://%@",str]]];
    [callPhoneWebVw loadRequest:request];
}