思路1

 一、单选

1、创建一个currentIndexPath为了记录当前选择的indexPath。2、 如果是记录上一次选中的内容，可以通过模型中的是否选中来初始化indexPathForRow。3、首先判断创建的indexPath是否等于当前点击的indexPath。4、如果不等于数组中的模型全部置为NO。5、再将当前点击的indexPath传给创建的currentIndexPath,并刷新当前表格（传创建的currentIndexPath)。6、通过点击的indexPath取出当前模型并取反，再通过点击的indexPath刷新表格代码如下：1、_indexPath = [NSIndexPath indexPathForRow:[group.brand indexOfObject:viewModel] inSection:[_dataArray indexOfObject:group]];//取出选中的行及列，viewModel表示是选中的模型，如果进入页面不需要设置上一次选中的内容可以不写这一步。2、NSIndexPath *selectIndexPath = _indexPath;   if (selectIndexPath && selectIndexPath != indexPath) {//判断创建的indexPath是否不等于点击的indexPath       for (GMeSaleAreaGroupViewModel *GviewModel in _dataArray) {//如果不等于置为NO          for (GMeSaleAreaViewModel*viewModel  in GviewModel.brand) {                 viewModel.isSelect = NO;             }         }//刷新没有选中的表格    [tableView reloadRowsAtIndexPaths:@[_indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];  }_indexPath = indexPath; //点击的indexPath传给上一个点击的indexPathGMeSaleAreaViewModel *viewModel = [GroupViewModel.brand objectAtIndex:indexPath.row]; //取出当前点击的indexPath  viewModel.isSelect = !viewModel.isSelect;//取反 [tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];//刷新当前点击的表格

　　

二、全选

　　1.创建可变数组,存储所有未选中状态(NO)的布尔值按钮,点击时改变其状态，并传入按钮的状态。

 三、多选

　　1.创建Cell时，从数组中取出相应的值，传给cell,如果为YES，否则为NO.

　　2.点击cell时，从数组中取出相应的值，取反，然后刷新该行。

四、代码先行

#import "ViewController.h"#import "CheckBoxCell.h"@interface ViewController ()
     
      {        UITableView *_tableView;}@property (nonatomic, strong)NSMutableArray      *dataArray;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.    [self loadUI];    [self loadDataWithSelected:NO];}- (void)loadUI{        _tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 50,self.view.bounds.size.width,self.view.bounds.size.height - 50) style:UITableViewStylePlain];    _tableView.delegate = self;    _tableView.dataSource = self;    [self.view addSubview:_tableView];        UIButton *customBtn = [UIButton buttonWithType:UIButtonTypeCustom];    [customBtn setFrame:CGRectMake(50,0 , 200, 50)];    [customBtn setBackgroundColor:[UIColor lightGrayColor]];    [customBtn setTitle:@"多选" forState:UIControlStateNormal];    [customBtn setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];    [customBtn setTitle:@"全选" forState:UIControlStateSelected];    [customBtn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:customBtn];}- (void)loadDataWithSelected:(BOOL)isSelected{        NSMutableArray *arr = [NSMutableArray array];    for (NSInteger i = 0; i< 20; i++) {        [arr addObject:@(isSelected)];    }    self.dataArray = arr;    [_tableView reloadData];}- (void)btnClick:(UIButton *)sender{        [self loadDataWithSelected:sender.selected];    sender.selected = !sender.selected;}#pragma mark --- tableview- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{    return self.dataArray.count;}- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{        static NSString *ID = @"checkBoxCell";    CheckBoxCell *cell  = [tableView dequeueReusableCellWithIdentifier:ID];    if (cell == nil) {        cell  = [[CheckBoxCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:ID];    }    if (self.dataArray.count > indexPath.row) {        NSNumber *selected = [self.dataArray objectAtIndex:indexPath.row];        [cell setChecked:selected.boolValue];    }    return cell;}- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{        [tableView deselectRowAtIndexPath:indexPath animated:YES];        if (self.dataArray.count > indexPath.row) {        NSNumber *selected = self.dataArray [indexPath.row];        self.dataArray[indexPath.row] = @(!selected.boolValue);        [tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];    }   }
     

cell代码同下;

思路2

原文地址： http://www.cnblogs.com/hxwj/p/4532172.html

思路分析

前期准备：1.创建两个数组：一个数据数组array,一个状态数组checkArray，(初始化时每一个值为NO).

　　　　　2.多选，初始化时存入所有NO值给checkArray,点击cell时取出每一值取反,全选则是根据按钮状态，如果是选中全部为YES,否则全部为NO。

一.全选

　　1.点击时反选按钮状态，取出所有indexPath未选中状态给新的数组，然后遍历取出相应的indexpath,cell和row;

      2.取出每一个值，如果是选中，设置为YES,否则设置为NO.

二.多选(点击cell时，取出相应的row和cell,根据row从checkArray取出一项，并设置cell状态)

　　1.当cell点击时，根据点击cell的row从checkArray取出相应的项,改变其值，如果是YES,设置为YES,否则设置为NO。

三.代码先行

cell

#import "CheckBoxCell.h"@interface CheckBoxCell(){        BOOL        _isSelect;    UIImageView *_chectImageView;    }@end@implementation CheckBoxCell- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{    if (self == [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {                _chectImageView = [[UIImageView alloc] init];        _chectImageView.image = [UIImage imageNamed:@"normal"];        [self.contentView addSubview:_chectImageView];    }    return self;}- (void)layoutSubviews{        [super layoutSubviews];    [_chectImageView setFrame:CGRectMake(10, 10,30, 30)];}- (void)setchecked:(BOOL)checked{        _isSelect = checked;    if(_isSelect){                _chectImageView.image = [UIImage imageNamed:@"select"];    }else{        _chectImageView.image = [UIImage imageNamed:@"normal"];    }

VIewControll

#import "ChectBoxViewController.h"#import "CheckBoxCell.h"@interface ChectBoxViewController ()
     
      {            UITableView   *_tableView;}@property (nonatomic, strong)NSArray *array;@property (nonatomic, strong)NSMutableArray *chectArray;@end@implementation ChectBoxViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view.    [self loadUI];    [self loadData];}#pragma mark --- viewDidLoad- (void)loadUI{        _tableView = [[UITableView alloc] initWithFrame:CGRectMake(0,50, self.view.bounds.size.width, self.view.bounds.size.height) style:UITableViewStylePlain];    _tableView.delegate = self;    _tableView.dataSource = self;    [_tableView setBackgroundColor:[UIColor lightGrayColor]];    [self.view addSubview:_tableView];            UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];    [btn setTitle:@"多选" forState:UIControlStateNormal];    [btn setTitle:@"全选" forState:UIControlStateSelected];    [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];    [btn setFrame:CGRectMake(10, 10, 100, 50)];    [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];    [self.view addSubview:btn];}- (void)loadData{        _chectArray = [NSMutableArray array];    for (NSInteger i = 0; i < self.array.count; i++) {        NSMutableDictionary *dic = [NSMutableDictionary dictionary];        [dic setValue:@"NO" forKey:@"checked"];        [_chectArray addObject:dic];    }}#pragma mark --- tableView- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{    return self.array.count;}- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{        static NSString *ID = @"checkboxCell";    CheckBoxCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];    if (cell == nil) {        cell = [[CheckBoxCell  alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:ID];    }    return  cell;}- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{        [tableView deselectRowAtIndexPath:indexPath animated:YES];         CheckBoxCell*cell = (CheckBoxCell *)[tableView cellForRowAtIndexPath:indexPath];    NSInteger row = indexPath.row;    [self cellChecked:cell row:row isSelected:YES];}#pragma mark --- response methods/** *  点击，和加载cell的时候进行判断，从而改变cell的选中状态 * *  @param cell     自定义cell *  @param row      tableView的下标 *  @param selected 是否是点击 */- (void)cellChecked:(CheckBoxCell *)cell row:(NSInteger)row isSelected:(BOOL)selected{            NSMutableDictionary *dic = [_chectArray objectAtIndex:row];    if ([[dic objectForKey:@"checked"] isEqualToString:@"NO"]) {        if (selected) {            [dic setObject:@"YES" forKey:@"checked"];            [cell setchecked:YES];        }    }else{                if (selected) {            [dic setObject:@"NO" forKey:@"checked"];            [cell setchecked:NO];        }    }}- (void)btnClick:(UIButton *)sender{
   //全选        sender.selected = !sender.selected;        NSArray *arrayOfIndexPath = [NSArray arrayWithArray:[_tableView indexPathsForVisibleRows]];    for (NSInteger i = 0; i < arrayOfIndexPath.count; i++) {        NSIndexPath *indexPath = [arrayOfIndexPath objectAtIndex: i];        CheckBoxCell *cell = (CheckBoxCell *)[_tableView cellForRowAtIndexPath:indexPath];        NSUInteger row = [indexPath row];        NSMutableDictionary *dic = [_chectArray objectAtIndex:row];            if (sender.selected) {                [dic setObject:@"YES" forKey:@"checked"];                [cell setchecked:YES];            }else{                [dic setObject:@"NO" forKey:@"checked"];                [cell setchecked:NO];            }        }}- (NSArray *)array{    if (_array == nil) {        _array = [[NSMutableArray alloc] initWithObjects:@"1",@"2",@"3",@"4",@"5", nil];    }    return _array;}