1.显示所有的行

遵守UITableViewDataSource协议，必须实现的方法有两个：

// 每一节里面有多少行- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section// 每行的View，这里是UITableViewCell- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

2.修改每行高度选中行

遵守UITableViewDelegate协议

// 选中某行- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath// 设置每行高度- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

3.编辑模式

UITableView设置编辑模式可以（滑动）删除、添加和移动每一行。只需要修改其属性editing

@property(nonatomic,getter=isEditing) BOOL editing;

需要实现的方法

// 删除需要实现方法- (void) tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath// 移动需要实现的方法- (void) tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath

4.性能优化

首先根据Identifier从可重用的队列中拿，如果没有再重新分配Cell的内存。

static NSString *ID =@"tableview";UITableViewCell *cell = [tableViewdequeueReusableCellWithIdentifier:ID];if (cell == nil) {    cell= [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitlereuseIdentifier:ID];}

5.例子

模型类：

Shop.h

@interface Shop : NSObject@property (nonatomic, copy) NSString *icon;@property (nonatomic, copy) NSString *name;@property (nonatomic, copy) NSString *desc;@property (nonatomic) BOOL isChecked;+ (id)shopWithName:(NSString *)name icon:(NSString *)icon desc:(NSString *)desc;@end

Shop.m

#import "Shop.h"@implementation Shop+ (id)shopWithName:(NSString *)name icon:(NSString *)icon desc:(NSString *)desc{    Shop *shop = [[Shop alloc] init];    shop.icon = icon;    shop.name = name;    shop.desc = desc;    return shop;}@end

自定义UITableViewCell

QhMyTableViewCell.h

@class Shop;@interface QhMyTableViewCell : UITableViewCell+ (QhMyTableViewCell *) myTableViewCell;@property (weak, nonatomic) IBOutlet UIImageView *imageViews;@property (weak, nonatomic) IBOutlet UILabel *title;@property (weak, nonatomic) IBOutlet UILabel *desc;@property (nonatomic) Shop * shop;@end

QhMyTableViewCell.m

@implementation QhMyTableViewCell+ (QhMyTableViewCell *) myTableViewCell{    NSArray * views = [[NSBundle mainBundle] loadNibNamed:@"cell" owner:nil options:nil];    QhMyTableViewCell * view = views[0];    return view;}#pragma  mark -重写set方法，设置数据- (void)setShop:(Shop *)shop{    self.imageView.image = [UIImage imageNamed:[shop icon]];    self.title.text = [shop name];    self.desc.text = [shop desc];}@end

QhViewController.h

@interface QhViewController : UIViewController@property (weak, nonatomic) IBOutlet UITableView *tableView;@property (weak, nonatomic) IBOutlet UIBarButtonItem *name;@property (weak, nonatomic) IBOutlet UIBarButtonItem *deleteIcon;@property (weak, nonatomic) IBOutlet UIBarButtonItem *allPick;//删除／编辑／反选按按钮的动作- (IBAction)remove:(UIBarButtonItem *)sender;- (IBAction)edit:(UIBarButtonItem *)sender;- (IBAction)allPickAction:(id)sender;// 使用加载xib然后通过连线的方式找到子控件进行设置，file owner设置为该控制器类时的输出口@property (weak, nonatomic) IBOutlet UIImageView *imageView;@property (weak, nonatomic) IBOutlet UILabel *titles;@property (weak, nonatomic) IBOutlet UILabel *descs;@end

QhViewController.m

@interface QhViewController () 
    
     {    NSMutableArray * _shops;    BOOL _flag;}@end@implementation QhViewController- (void)viewDidLoad{    [super viewDidLoad];    _shops = [NSMutableArray array];    Shop *shop1 = [Shop shopWithName:@"111" icon:@"001.png" desc:@"111，111，111"];    Shop *shop2 = [Shop shopWithName:@"222" icon:@"002.png" desc:@"222，222，222"];    Shop *shop3 = [Shop shopWithName:@"333" icon:@"003.png" desc:@"333，333，333"];    Shop *shop4 = [Shop shopWithName:@"444" icon:@"004.png" desc:@"444，444，444"];    Shop *shop5 = [Shop shopWithName:@"555" icon:@"005.png" desc:@"555，555，555"];    Shop *shop6 = [Shop shopWithName:@"666" icon:@"006.png" desc:@"666，666，666"];    Shop *shop7 = [Shop shopWithName:@"777" icon:@"007.png" desc:@"777，777，777"];    Shop *shop8 = [Shop shopWithName:@"888" icon:@"008.png" desc:@"888，888，888"];    Shop *shop9 = [Shop shopWithName:@"666" icon:@"006.png" desc:@"666，666，666"];    Shop *shop10 = [Shop shopWithName:@"777" icon:@"007.png" desc:@"777，777，777"];    Shop *shop11 = [Shop shopWithName:@"888" icon:@"008.png" desc:@"888，888，888"];    Shop *shop12 = [Shop shopWithName:@"666" icon:@"006.png" desc:@"666，666，666"];    Shop *shop13 = [Shop shopWithName:@"777" icon:@"007.png" desc:@"777，777，777"];    Shop *shop14 = [Shop shopWithName:@"888" icon:@"008.png" desc:@"888，888，888"];    [_shops addObjectsFromArray:@[shop1, shop2, shop3,shop4,shop5,shop6,shop7,shop8,shop9,shop10,shop11,shop12,shop13,shop14]];}//- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView//{//    return  1;//}#pragma mark 每一节里面有多少行- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{    // 刷新数据时更改反选按钮的状态，没有数据时为不可选种状态    if (_shops.count > 0) {        [_allPick setEnabled:YES];    }    else        [_allPick setEnabled:NO];    // 记录选中的行数    NSInteger i = 0;    for (Shop * shop in _shops) {        if (shop.isChecked) {            i++;        }    }    NSString * nameString;    if (i>0) {       nameString = [NSString stringWithFormat:@"已勾选(%d)",i];    }else    nameString = @"已勾选";    self.name.title = nameString;    // 只要有一行为选中状态就让删除按钮为可选状态    _flag = NO;    for (Shop * shop in _shops) {        if (shop.isChecked) {            _flag = YES;        }    }    if (_flag) {        [_deleteIcon setEnabled:YES];    }else        [_deleteIcon setEnabled:NO];    return _shops.count;    }#pragma mark－ 每行显示的cell#pragma mark 1表示使用系统自带的cell作为每一行的布局。#pragma mark 2表示加载自定义的xib文件，然后通过顺序或者tag找到每个子控件赋值。#pragma mark 3表示加载xib然后通过连线的方式找到子控件进行设置，file owner设置为控制器类。#pragma mark  最终采用的方式是自定义UITableViewCell，将xib对应的类修改为自己的类，连线。fileowner设置为nil。- (UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    static NSString *ID = @"tableview";//1    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];     QhMyTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];    if (cell == nil) {//1        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:ID];//2        NSArray * views = [[NSBundle mainBundle] loadNibNamed:@"cell" owner:nil options:nil];//2        cell = views[0];        //3        NSArray * views = [[NSBundle mainBundle] loadNibNamed:@"cell" owner:self options:nil];//3        cell = views[0];        cell = [QhMyTableViewCell myTableViewCell];    }    NSLog(@"----->%p", cell);//2    UIImageView * imageView = cell.contentView.subviews[0];//2    UILabel * title = cell.contentView.subviews[1];//2    UILabel * desc = cell.contentView.subviews[2];//3    不需要，因为已经通过连线定义了输出口        Shop * shop =  _shops[indexPath.row];//1    cell.imageView.image = [UIImage imageNamed:shop.icon];//1    cell.textLabel.text = [shop name];//1    cell.detailTextLabel.text = [shop desc];    //2    imageView.image = [UIImage imageNamed:shop.icon];//2    title.text = [shop name];//2    desc.text = [shop desc];    //3    _imageView.image = [UIImage imageNamed:shop.icon];//3    _titles.text = [shop name];//3    _descs.text = [shop desc];        [cell setShop:shop];    if (shop.isChecked) {        cell.accessoryType = UITableViewCellAccessoryCheckmark;    }else         cell.accessoryType = UITableViewCellAccessoryNone;   return cell;}- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{    return 80;}- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{    NSInteger clickIndex = indexPath.row;    Shop * shop = _shops[clickIndex];    BOOL b = shop.isChecked;    shop.isChecked = !b;    [_tableView reloadData];}#pragma mark 删除按钮的动作- (IBAction)remove:(UIBarButtonItem *)sender{    int i = 0;    for (;i < _shops.count;) {        Shop * shop = _shops[i];        if (shop.isChecked) {            [_shops removeObjectAtIndex:i];            i = 0;        }else i ++;    }    [_tableView reloadData];}#pragma mark 反选按钮的动作- (IBAction)allPickAction:(id)sender {    for (Shop * shop in _shops) {        BOOL b = shop.isChecked;        shop.isChecked = !b;    }    [_tableView reloadData];}#pragma mark 编辑按钮的动作- (IBAction)edit:(UIBarButtonItem *)sender {    //_tableView.editing = !self.tableView.editing;    [_tableView setEditing:!self.tableView.editing animated:YES];}#pragma mark 删除对应的行  滑动删除的方法- (void) tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{    // 从数据源删除    [_shops removeObjectAtIndex:indexPath.row];        // 刷新数据    [_tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationTop];}#pragma mark 编辑模式下移动行要实现的方法- (void) tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath{    Shop * s = _shops[sourceIndexPath.row];    // 先删除源    [_shops removeObjectAtIndex:sourceIndexPath.row];    // 再插入到目的    [_shops insertObject:s atIndex:destinationIndexPath.row];    // 刷新数据}@end

在- (NSInteger)tableView:(UITableView *)tableViewnumberOfRowsInSection:(NSInteger)section方法中的数字表示使用了四种方式达到相同的目的。方式2和Android里面的思路一致。最终采用的方式可以实现松耦合有利于代码以后的重新利用。

1表示使用系统自带的cell作为每一行的布局。

2表示加载自定义的xib文件，然后通过顺序或者tag找到每个子控件赋值。

3表示加载xib然后通过连线的方式找到子控件进行设置，file owner设置为控制器类。

最终采用的方式是自定义UITableViewCell，将xib对应的类修改为自己的类，连线。fileowner设置为nil。

转载于:https://www.cnblogs.com/qhyuan1992/p/5385304.html

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