前言

在平時的開發tableview可以說是用到的最多的控件了，而且tableview的單選和多選也并不少見，今天就來討論下tableview的單選和多選。

單選

單選的邏輯其實就是記錄選中的indexpath，然后當用戶選擇cell的時候把上次選中的cell取消，選中本次選擇的cell

#import "SingleSelectViewController.h"

@interface SingleSelectViewController ()<UITableViewDelegate,UITableViewDataSource>

@property (nonatomic, strong) UITableView     *tableView;
@property (nonatomic, strong) NSMutableArray  *dataArray;
@property (nonatomic, strong) NSIndexPath     *selectedIndexPath;

@end

@implementation SingleSelectViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    self.view.backgroundColor = [UIColor whiteColor];
    self.title = @"single select";
    
    [self setupViews];
}

- (void)setupViews{
    
    for (NSInteger i = 0; i < 10; i ++) {
        NSString *str = [NSString stringWithFormat:@">>>>>%lu",i];
        [self.dataArray addObject:str];
    }
    
    
    self.tableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];
    self.tableView.dataSource = self;
    self.tableView.delegate   = self;
    self.tableView.tableFooterView = [UIView new];
    self.tableView.cellLayoutMarginsFollowReadableWidth = NO;
    [self.view addSubview:self.tableView];
    
}

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath{
    return YES;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return self.dataArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *identifier = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
    }
    
    if (self.selectedIndexPath && self.selectedIndexPath == indexPath) {
        cell.textLabel.textColor = [UIColor blueColor];
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
    }else{
        cell.textLabel.textColor = [UIColor blackColor];
        cell.accessoryType = UITableViewCellAccessoryNone;
    }
    
    cell.textLabel.text = self.dataArray[indexPath.row];
    
    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    
    UITableViewCell *cell;
    
    /*NSIndexPath *indexPath = [NSIndexPath indexPathForRow:sender.tag inSection:0];*/ /*如果是點擊cell上子控件可用此方法找到對應path*/
    
    if (self.selectedIndexPath) {
        cell = [self.tableView cellForRowAtIndexPath:self.selectedIndexPath];
        cell.textLabel.textColor = [UIColor blackColor];
        cell.accessoryType = UITableViewCellAccessoryNone;
    }
    
    cell = [self.tableView cellForRowAtIndexPath:indexPath];
    cell.textLabel.textColor = [UIColor blueColor];
    cell.accessoryType = UITableViewCellAccessoryCheckmark;
    
    self.selectedIndexPath = indexPath;
    [self.tableView reloadData];
}

- (NSMutableArray *)dataArray{
    if (!_dataArray) {
        _dataArray = [NSMutableArray array];
    }
    return _dataArray;
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end

多選

多選的邏輯也不復雜，主要是再編輯狀態下記錄用戶選擇了哪些cell，在editingStyleForRowAtIndexPath里返回UITableViewCellEditingStyleDelete | UITableViewCellEditingStyleInsert就可以設置多選，多選的時候只要操作相應的數據就可以了

#import "MoreSelectViewController.h"

@interface MoreSelectViewController ()<UITableViewDelegate,UITableViewDataSource>

@property (nonatomic, strong) UITableView    *tableView;
@property (nonatomic, strong) NSMutableArray *dataArray;
@property (nonatomic, strong) NSMutableArray *selectArray;

@end

@implementation MoreSelectViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor = [UIColor whiteColor];
    
    self.title = @"more select";
    
    [self setupViews];
    
}

- (void)setupViews{
    
    for (NSInteger i = 0; i < 10; i ++) {
        NSString *str = [NSString stringWithFormat:@">>>>>%lu",i];
        [self.dataArray addObject:str];
    }
    
    UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithTitle:@"編輯" style:UIBarButtonItemStyleDone target:self action:@selector(editAction:)];
    self.navigationItem.rightBarButtonItem = item;
    
    
    self.tableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];
    self.tableView.dataSource = self;
    self.tableView.delegate   = self;
    self.tableView.tableFooterView = [UIView new];
    self.tableView.cellLayoutMarginsFollowReadableWidth = NO;
    [self.view addSubview:self.tableView];
    
}

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath{
    return YES;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return self.dataArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *identifier = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
    }
    
    cell.textLabel.text = self.dataArray[indexPath.row];
    
    return cell;
}

- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{
    return UITableViewCellEditingStyleDelete | UITableViewCellEditingStyleInsert;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    
    NSString *str = self.dataArray[indexPath.row];
    [self.selectArray addObject:str];
}
- (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath{
    NSString *str = self.dataArray[indexPath.row];
    [self.selectArray removeObject:str];
}

- (void)editAction:(UIBarButtonItem *)item{
    if ([item.title isEqualToString:@"編輯"]) {
        if (self.dataArray.count == 0) {
            return;
        }
        item.title = @"取消";
        [self.tableView setEditing:YES animated:YES];
    }else{
        item.title = @"編輯";
        [self.tableView setEditing:NO animated:YES];
        
    }
    NSLog(@">>>>>>>>>>selectArrayCount : %lu",self.selectArray.count);
}

- (NSMutableArray *)dataArray{
    if (!_dataArray) {
        _dataArray = [NSMutableArray array];
    }
    return _dataArray;
}

- (NSMutableArray *)selectArray{
    if (!_selectArray) {
        _selectArray = [NSMutableArray array];
    }
    return _selectArray;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end

Demo在這里下載

總結

以上就是對TableView單選和多選的一些總結，如果有寫的不好的地方，請多多指正。