[10]UITableView表示图2 自适应高度

//设置一个字符串读取文件路径
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"Students" ofType:@"plist"];
//通过文件路径存入到数组
NSArray *array = [[NSArray alloc] initWithContentsOfFile:filePath];

//.h文件
@interface Person : NSObject

@property (nonatomic,retain) NSString *icon;
@property (nonatomic,retain) NSString *name;
@property (nonatomic,retain) NSString *phoneNumber;
@property (nonatomic,retain) NSString *sex;
@property (nonatomic,retain) NSString *introduce;
@end
//.m文件
@implementation Person

-(void)dealloc
{
[_icon release];
[_name release];
[_phoneNumber release];
[_introduce release];
[_sex release];
[super dealloc];

}

-(void)setValue:(id)value forUndefinedKey:(NSString *)key
{

}
//上下俩个 是取值 和 过来没有key的值值
- (id)valueForUndefinedKey:(NSString *)key
{
return nil;
}
@end

#import <UIKit/UIKit.h>
@class Person;

@interface PersonCell1 : UITableViewCell

@property (nonatomic,readonly,retain) UIImageView *headImageView;
@property (nonatomic,retain,readonly) UILabel *nameLabel;
@property (nonatomic,retain,readonly) UILabel *phoneLabel;
@property (nonatomic,retain,readonly) UILabel *introduceLabel;

@property (nonatomic,retain) Person *person;

//实现自适应高度,我们自己添加一个求cell的高度的方法
+ (CGFloat)cellHieghtForPerson:(Person *)p;

@end

//.m文件中的
#import "PersonCell1.h"
#import "Person.h"
//由于这个方法我们只写在了本类中,我们定义为+方法,切写延展中,主要是外面也用不到
@interface PersonCell1 ()
//创建一个方法用来获得文本框的高度用的
+ (CGFloat )heightForString:(NSString *)str;

@end

@implementation PersonCell1

-(void)dealloc
{
[_nameLabel release];
[_introduceLabel release];
[_person release];
[_phoneLabel release];
[_headImageView release];
[super dealloc];
}
//重写UITableViewCell的初始化方法,并在里面给我们的空间定好位置布局
- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
_headImageView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 10, 80, 120)];
[self.contentView addSubview:_headImageView];

_nameLabel = [[UILabel alloc] initWithFrame:CGRectMake(100, 10, 210, 20)];
[self.contentView addSubview:_nameLabel];

_phoneLabel = [[UILabel alloc] initWithFrame:CGRectMake(100, 35, 210, 20)];
[self.contentView addSubview:_phoneLabel];

_introduceLabel = [[UILabel alloc] initWithFrame:CGRectMake(100, 60, 210, 70)];
_introduceLabel.font = [UIFont systemFontOfSize:18];
_introduceLabel.numberOfLines = 0;
[self.contentView addSubview:_introduceLabel];

}

return  self;
}
//重写person属性的set方法,懒加载的方式再里面进行数据的匹配,让我们控件要显示的文本和Person类的属性一一对应起来
-(void)setPerson:(Person *)person
{
if (_person != person) {
[_person release];

_person = [person retain];
_headImageView.image = [UIImage imageNamed:person.icon];
_nameLabel.text = person.name;
_phoneLabel.text = person.phoneNumber;
_introduceLabel.text = person.introduce;
_introduceLabel.frame = CGRectMake(100, 60, 210, [PersonCell1 heightForString:person.introduce]);

}

}

//计算文本框的高度
+ (CGFloat )heightForString:(NSString *)str
{

NSDictionary *dic = [[NSDictionary alloc] initWithObjectsAndKeys:[UIFont systemFontOfSize:18],NSFontAttributeName, nil];

CGRect rect = [str boundingRectWithSize:CGSizeMake(210, 1000) options:NSStringDrawingUsesLineFragmentOrigin attributes:dic context:nil];

return rect.size.height;
}
//计算cell的高度
+ (CGFloat)cellHieghtForPerson:(Person *)p
{
//自我介绍label的y值加上自我介绍label的height 加上 最下面那块空白区域
CGFloat height = 60 + [PersonCell1 heightForString:p.introduce]+10;
return height > 140 ? height:140;
}
//以下为cell自带的方法
- (void)awakeFromNib {
// Initialization code
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
[super setSelected:selected animated:animated];

// Configure the view for the selected state
}

@end

#import <UIKit/UIKit.h>
//接受这俩个协议,只要是使用UITabelView基本上都会使用这俩
@interface RootViewController : UIViewController<UITableViewDataSource,UITableViewDelegate>
//可变数组存放我们plist文件中的数据 只不过是用来先把原数据转换后存入的
@property (nonatomic,retain) NSMutableArray *persons;
//tableView表示图 设置为属性,方便使用
@property (nonatomic,retain) UITableView *tableView;

@end

//.m文件中

#import "RootViewController.h"
#import "Person.h"
#import "PersonCell1.h"
#import "PersonCell2.h"

@interface RootViewController ()

@end

@implementation RootViewController
-(void)dealloc
{
[_persons release];
[_tableView release];
[super dealloc];
}

-(void)loadView
{
//初始化
_tableView = [[UITableView alloc] initWithFrame:[UIScreen mainScreen].bounds style:UITableViewStylePlain];
//设置显示条的颜色
_tableView.separatorColor = [UIColor redColor];
//接收俩个代理
_tableView.delegate = self;
_tableView.dataSource = self;
self.view = _tableView;
}

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

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"Students" ofType:@"plist"];

NSArray *array = [[NSArray alloc] initWithContentsOfFile:filePath];
//persons可变数组初始化开辟空间,这部不可省略!!!
_persons = [[NSMutableArray alloc] initWithCapacity:[array count]];
//通过forin快速遍历,把plist的文件转化成我们想要的person类型
for (NSDictionary *dic in array) {
Person *person = [[Person alloc] init];
//kvc的一种模式 直接把字典转换,但是 person的属性设置 和 key一定要匹配 如果我们写的key值没有全部引用我们要在后面加方法
[person setValuesForKeysWithDictionary:dic];

[_persons addObject:person];
[person release];
}
[array release];
}
//控制器中原有的警告方法
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

//返回行高的方法 也就是代理中的方法
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
Person * p = _persons[indexPath.row];
if ([p.sex isEqualToString:@"女"] ) {
return [PersonCell2 cellHieghtForPerson:_persons[indexPath.row]];
}
else
{
return  [PersonCell1 cellHieghtForPerson:_persons[indexPath.row]];
}
}
//处理数据的代理中必须执行的方法之一,返回多少行
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [_persons count];
}
//处理数据的代理中必须要执行的方法之一,给我们的cell设值的方法
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
Person *p = _persons[indexPath.row];
if ([p.sex isEqual:@"女"]) {

static NSString *resueIdentifier = @"person2";
PersonCell2 *cell2 = [tableView dequeueReusableHeaderFooterViewWithIdentifier:resueIdentifier];

if (cell2 == nil) {
cell2 = [[[PersonCell2 alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:resueIdentifier] autorelease];
}
cell2.person = _persons[indexPath.row];
return cell2;
}
else
{
static NSString *resueIdentifier = @"person1";
PersonCell1 *cell1 = [tableView dequeueReusableHeaderFooterViewWithIdentifier:resueIdentifier];

if (cell1 == nil) {
cell1 = [[[PersonCell1 alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:resueIdentifier] autorelease];
}
cell1.person = _persons[indexPath.row];
return cell1;
}
}

@end