UITableViewCell 多选和全选(checkBoxCell)
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(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 ()<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(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; }
将来的自己,会感谢现在不放弃的自己!