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indexPath
GMeSaleAreaViewModel *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 ()<UITableViewDelegate,UITableViewDataSource>{ 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(, ,self.view.bounds.size.width,self.view.bounds.size.height - ) style:UITableViewStylePlain];
_tableView.delegate = self;
_tableView.dataSource = self;
[self.view addSubview:_tableView]; UIButton *customBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[customBtn setFrame:CGRectMake(, , , )];
[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 = ; i< ; 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(, ,, )];
}
- (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 ()<UITableViewDelegate,UITableViewDataSource>{ 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(,, 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(, , , )];
[btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[self.view addSubview:btn];
}
- (void)loadData{ _chectArray = [NSMutableArray array];
for (NSInteger i = ; 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 = ; 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:@"",@"",@"",@"",@"", nil];
}
return _array;
}