RootTableViewController *rootVC = [[RootTableViewController alloc] initWithStyle:UITableViewStyleGrouped];    UINavigationController *ngVc = [[UINavigationController alloc] initWithRootViewController:rootVC];    self.window.rootViewController = ngVc;    [ngVc release];    [rootVC release];

//.h中代码#import <UIKit/UIKit.h>@interface RootTableViewController : UITableViewController{    NSMutableArray *_studentsArray;}@end//.m中代码#import "RootTableViewController.h"#import "StudentCell.h"#import "Student.h"#import "SecondCell.h"@interface RootTableViewController ()@end@implementation RootTableViewController- (id)initWithStyle:(UITableViewStyle)style{    self = [super initWithStyle:style];    if (self) {        self.navigationItem.title =@"通讯录";        // Custom initialization    }    return self;}- (void)viewDidLoad{    [super viewDidLoad];        //这是一个单例,用来取文件路径    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"Students" ofType:@"plist"];      NSArray *students = [[NSArray alloc] initWithContentsOfFile:filePath];    _studentsArray = [[NSMutableArray alloc] initWithCapacity:[students count]];    for (int i = 0; i<[students count]; i++) {        NSDictionary *dic = [students objectAtIndex:i];        Student *stu = [[Student alloc] init];        //使用kvc        [stu setValuesForKeysWithDictionary:dic];        [_studentsArray addObject:stu];        [stu release];    }    [students release];    NSLog(@"%@",_studentsArray);    // Uncomment the following line to preserve selection between presentations.    // self.clearsSelectionOnViewWillAppear = NO;        // Uncomment the following line to display an Edit button in the navigation bar for this view controller.    // self.navigationItem.rightBarButtonItem = self.editButtonItem;}- (void)didReceiveMemoryWarning{    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}#pragma mark - Table view data source- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{#warning Potentially incomplete method implementation.    // Return the number of sections.    return 1;}- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{#warning Incomplete method implementation.    // Return the number of rows in the section.    return [_studentsArray count];}/////********************一种方法************************//- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath//{//    static NSString *identifier = @"cell";//    //    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];//    if (cell == nil) {//        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier] autorelease];//    }//    //创建一个label//    [[cell.contentView viewWithTag:1000] removeFromSuperview];//    UILabel *sexlabel = [[UILabel alloc] initWithFrame:CGRectMake(100, 0, 100, 40)];//    sexlabel.tag = 1000;//    [cell.contentView addSubview:sexlabel];//    [sexlabel release];//    //    //    NSDictionary *student = [_studentsArray objectAtIndex:indexPath.row];//    //    cell.textLabel.text = [student objectForKey:@"name"];//    sexlabel.text = [student objectForKey:@"sex"];//    //    // Configure the cell...//    //    return cell;//}//////********************方法二*********************//- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath//{//    static NSString *identifier = @"cell";//    //    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];//    if (cell == nil) {//        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier] autorelease];//        //创建一个cell创建一个label,第一种方法的优化,第一种方法一直开辟空间释放空间,占用系统资源//    [[cell.contentView viewWithTag:1000] removeFromSuperview];//    UILabel *sexlabel = [[UILabel alloc] initWithFrame:CGRectMake(100, 0, 100, 40)];//    sexlabel.tag = 1000;//    [cell.contentView addSubview:sexlabel];//    [sexlabel release];//    }//    //if中的sexlabel是一个局部变量,需要在外面重写一个label接受tag=1000的label//    UILabel *sexlabel = (UILabel *)[cell.contentView viewWithTag:1000];//    //    NSDictionary *student = [_studentsArray objectAtIndex:indexPath.row];//    //    cell.textLabel.text = [student objectForKey:@"name"];//    sexlabel.text = [student objectForKey:@"sex"];//    //    //    // Configure the cell...//    //    return cell;//}/////***************第三种建一个UITableViewCell子类*******************- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    Student *stu = [_studentsArray objectAtIndex:indexPath.row];    if ([stu.sex isEqualToString:@"男"]) {        static NSString *identifier = @"cell1";        StudentCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];        if (cell == nil) {            cell = [[[StudentCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier] autorelease];        }        cell.stu = _studentsArray[indexPath.row];        return cell;    }else{        static NSString *identifier = @"cell";                SecondCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];        if (cell == nil) {            cell = [[[SecondCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier] autorelease];                    }        cell.stu = _studentsArray[indexPath.row];                // Configure the cell...                return cell;    }    //    static NSString *identifier = @"cell";//    //    SecondCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];//    if (cell == nil) {//        cell = [[[SecondCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier] autorelease];////    }////////    Student *student = [_studentsArray objectAtIndex:indexPath.row];////    [cell setStu:student];//    cell.stu = _studentsArray[indexPath.row];////    cell.nameLabel.text = student.name;////    cell.sexLabel.text = student.sex;////    cell.phoneLabel.text = student.phone;////    cell.photoImageView.image = [UIImage imageNamed:student.photo];//    ////    //    //    // Configure the cell...//    //    return cell;}- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{//    CGFloat height = Studentcell;    Student *stu = [_studentsArray objectAtIndex:indexPath.row];    CGRect rect = [stu.hobby boundingRectWithSize:CGSizeMake(250, 10000) options:NSStringDrawingUsesLineFragmentOrigin attributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIFont systemFontOfSize:18],NSFontAttributeName, nil] context:nil];    if ([stu.sex isEqualToString:@"男"]) {                        return 92+rect.size.height+5;    }else{             return 92+rect.size.height+5;    }   }/*// Override to support conditional editing of the table view.- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath{    // Return NO if you do not want the specified item to be editable.    return YES;}*//*// Override to support editing the table view.- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{    if (editingStyle == UITableViewCellEditingStyleDelete) {        // Delete the row from the data source        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];    } else if (editingStyle == UITableViewCellEditingStyleInsert) {        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view    }   }*//*// Override to support rearranging the table view.- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath{}*//*// Override to support conditional rearranging of the table view.- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath{    // Return NO if you do not want the item to be re-orderable.    return YES;}*//*#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{    // Get the new view controller using [segue destinationViewController].    // Pass the selected object to the new view controller.}*/@end

//.h中代码#import <UIKit/UIKit.h>#import "Student.h"@interface StudentCell : UITableViewCell@property (nonatomic,retain) UILabel *nameLabel;@property (nonatomic,retain) UILabel *sexLabel;@property (nonatomic,retain) UILabel *phoneLabel;@property (nonatomic,retain) UIImageView *photoImageView;@property (nonatomic,retain) UILabel *hobbyLabel;//对cell中需要显示的数据进行封装,创建一个Student  Model类@property (nonatomic,retain) Student *stu;@end//.m中代码#import "StudentCell.h"@implementation StudentCell-(void)dealloc{    [_photoImageView release];    [_nameLabel release];    [_sexLabel release];    [_phoneLabel release];    [super dealloc];}- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];    if (self) {        //自定义cell        self.photoImageView = [[[UIImageView alloc] initWithFrame:CGRectMake(5, 2, 50, 50)] autorelease];        self.nameLabel = [[[UILabel alloc] initWithFrame:CGRectMake(70, 2, 100, 20)] autorelease];        self.sexLabel = [[[UILabel alloc] initWithFrame:CGRectMake(70, 32, 100, 20)] autorelease];        self.phoneLabel = [[[UILabel alloc] initWithFrame:CGRectMake(70, 62, 100, 20)] autorelease];        self.hobbyLabel = [[[UILabel alloc] initWithFrame:CGRectMake(70, 92, 250, 20)] autorelease];        //给hobbylabel设定一个字号,在表视图控制器里面直接可以使用        self.hobbyLabel.font = [UIFont systemFontOfSize:18];        //让它自适应高度,把行数设为0            self.hobbyLabel.numberOfLines = 0;                        [self.contentView addSubview:_photoImageView];        [self.contentView addSubview:_nameLabel];        [self.contentView addSubview:_sexLabel];        [self.contentView addSubview:_phoneLabel];        [self.contentView addSubview:_hobbyLabel];                // Initialization code    }    return self;}- (void)awakeFromNib{    // Initialization code}- (void)setSelected:(BOOL)selected animated:(BOOL)animated{    [super setSelected:selected animated:animated];    // Configure the view for the selected state}//重写setter方法- (void)setStu:(Student *)stu{    self.nameLabel.text = stu.name;    self.sexLabel.text = stu.sex;    self.phoneLabel.text = stu.phone;        self.photoImageView.image = [UIImage imageNamed:stu.photo];    //设置爱好自定义高度    CGRect rect = [stu.hobby boundingRectWithSize:CGSizeMake(250, 10000) options:NSStringDrawingUsesLineFragmentOrigin attributes:[NSDictionary dictionaryWithObjectsAndKeys:self.hobbyLabel.font,NSFontAttributeName, nil] context:nil];    self.hobbyLabel.frame = CGRectMake(70, 92, 250, rect.size.height);    self.hobbyLabel.text = stu.hobby;    }@end

//.h中代码#import <UIKit/UIKit.h>#import "Student.h"@interface SecondCell : UITableViewCell@property (nonatomic,retain) UILabel *nameLabel;@property (nonatomic,retain) UILabel *sexLabel;@property (nonatomic,retain) UILabel *phoneLabel;@property (nonatomic,retain) UIImageView *photoImageView;@property (nonatomic,retain) UILabel *hobbyLabel;@property (nonatomic,retain) Student *stu;@end//.m中代码#import "SecondCell.h"@implementation SecondCell-(void)dealloc{    [_photoImageView release];    [_nameLabel release];    [_sexLabel release];    [_phoneLabel release];    [_hobbyLabel release];    [super dealloc];}- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];    if (self) {        //自定义cell        self.photoImageView = [[[UIImageView alloc] initWithFrame:CGRectMake(260, 2, 50, 50)] autorelease];        self.nameLabel = [[[UILabel alloc] initWithFrame:CGRectMake(150, 2, 100, 20)] autorelease];        self.sexLabel = [[[UILabel alloc] initWithFrame:CGRectMake(150, 32, 100, 20)] autorelease];        self.phoneLabel = [[[UILabel alloc] initWithFrame:CGRectMake(150, 62, 100, 20)] autorelease];        self.hobbyLabel = [[[UILabel alloc] initWithFrame:CGRectMake(10, 92, 250, 20)] autorelease];        self.hobbyLabel.font = [UIFont systemFontOfSize:18];                        [self.contentView addSubview:_photoImageView];        [self.contentView addSubview:_nameLabel];        [self.contentView addSubview:_sexLabel];        [self.contentView addSubview:_phoneLabel];        [self.contentView addSubview:_hobbyLabel];        // Initialization code    }    return self;}- (void)awakeFromNib{    // Initialization code}- (void)setSelected:(BOOL)selected animated:(BOOL)animated{    [super setSelected:selected animated:animated];        // Configure the view for the selected state}//重写setter方法- (void)setStu:(Student *)stu{    self.nameLabel.text = stu.name;    self.sexLabel.text = stu.sex;    self.phoneLabel.text = stu.phone;    self.photoImageView.image = [UIImage imageNamed:stu.photo];    CGRect rect = [stu.hobby boundingRectWithSize:CGSizeMake(250, 10000) options:NSStringDrawingUsesLineFragmentOrigin attributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIFont systemFontOfSize:18],NSFontAttributeName, nil] context:nil];    self.hobbyLabel.frame = CGRectMake(10, 92, 250, rect.size.height);    self.hobbyLabel.text = stu.hobby;    }@end

//.h中代码#import <Foundation/Foundation.h>@interface Student : NSObject@property (nonatomic,retain) NSString *name;@property (nonatomic,retain) NSString *sex;@property (nonatomic,retain) NSString *phone;@property (nonatomic,retain) NSString *photo;@property (nonatomic,retain) NSString *hobby;//- (instancetype)initWithName:(NSString *)name sex:(NSString *)sex phone:(NSString *)phone photo:(NSString *)photo hobby:(NSString *)hobby;////- (instancetype)initWithDictionary:(NSDictionary *)stuInfoDic;@end//.m中代码#import "Student.h"@implementation Student-(void)dealloc{    [_name release];    [_sex release];    [_phone release];    [_photo release];    [_hobby release];    [super dealloc];}//用KVC取值,不用初始化方法//- (instancetype)initWithName:(NSString *)name sex:(NSString *)sex phone:(NSString *)phone photo:(NSString *)photo hobby:(NSString *)hobby//{//    self = [super init];//    if (self) {//        self.name = name;//        self.sex = sex;//        self.phone = phone;//        self.photo = photo;//        self.hobby = hobby;//    }//    return self;//}////- (instancetype)initWithDictionary:(NSDictionary *)stuInfoDic//{//    self = [super init];//    if (self) {//        self.name = [stuInfoDic objectForKey:@"name"];//        self.sex = [stuInfoDic objectForKey:@"sex"];//        self.phone = [stuInfoDic objectForKey:@"phone"];//        self.photo = [stuInfoDic objectForKey:@"photo"];//        self.hobby = [stuInfoDic objectForKey:@"hobby"];        //    }//    return self;//}-(void)setValue:(id)value forUndefinedKey:(NSString *)key{}@end