UITableViewCell 多选和全选(checkBoxCell)

#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"];
    }
  

#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;
}