UITableView多选删除

设置一个在编辑状态下点击可改变图片的cell

FileItemTableCell.h

#import <UIKit/UIKit.h>

@interface FileItemTableCell : UITableViewCell
{
@private
    UIImageView*    m_checkImageView;
    BOOL            m_checked;
}

- (void) setChecked:(BOOL)checked;

@end

FileItemTableCell.m

#import "FileItemTableCell.h"

@implementation FileItemTableCell

- (void) setCheckImageViewCenter:(CGPoint)pt alpha:(CGFloat)alpha animated:(BOOL)animated
{
    if (animated)
    {
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationBeginsFromCurrentState:YES];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
        [UIView setAnimationDuration:0.3];

        m_checkImageView.center = pt;
        m_checkImageView.alpha = alpha;

        [UIView commitAnimations];
    }
    else
    {
        m_checkImageView.center = pt;
        m_checkImageView.alpha = alpha;
    }
}

- (void) setEditing:(BOOL)editting animated:(BOOL)animated
{
    if (self.editing == editting)
    {
        return;
    }

    [super setEditing:editting animated:animated];

    if (editting)
    {
        self.selectionStyle = UITableViewCellSelectionStyleNone;

//        self.backgroundView = [[UIView alloc] init];
//        self.backgroundView.backgroundColor = [UIColor whiteColor];
//        self.textLabel.backgroundColor = [UIColor clearColor];
//        self.detailTextLabel.backgroundColor = [UIColor clearColor];

        if (m_checkImageView == nil)
        {
            m_checkImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Unselected.png"]];
            [self addSubview:m_checkImageView];
        }

        [self setChecked:m_checked];
        m_checkImageView.center = CGPointMake(-CGRectGetWidth(m_checkImageView.frame) * 0.5,
                                              CGRectGetHeight(self.bounds) * 0.5);
        m_checkImageView.alpha = 0.0;
        [self setCheckImageViewCenter:CGPointMake(20.5, CGRectGetHeight(self.bounds) * 0.5)
                                alpha:1.0 animated:animated];
    }
    else
    {
        m_checked = NO;
//        self.selectionStyle = UITableViewCellSelectionStyleBlue;
        self.backgroundView = nil;

        if (m_checkImageView)
        {
            [self setCheckImageViewCenter:CGPointMake(-CGRectGetWidth(m_checkImageView.frame) * 0.5,
                                                      CGRectGetHeight(self.bounds) * 0.5)
                                    alpha:0.0
                                 animated:animated];
        }
    }
}

- (void)dealloc
{
    m_checkImageView = nil;
}

- (void) setChecked:(BOOL)checked
{
    if (checked)
    {
        m_checkImageView.image = [UIImage imageNamed:@"Selected.png"];
        self.backgroundView.backgroundColor = [UIColor colorWithRed:223.0/255.0 green:230.0/255.0 blue:250.0/255.0 alpha:1.0];
    }
    else
    {
        m_checkImageView.image = [UIImage imageNamed:@"Unselected.png"];
        self.backgroundView.backgroundColor = [UIColor whiteColor];
    }
    m_checked = checked;
}

ViewController.m

#import "ViewController.h"
#import "FileItemTableCell.h"

@interface Item : NSObject

@property (retain, nonatomic) NSString *title;

@property (assign, nonatomic) BOOL isChecked;

@end

@implementation Item

@end
@interface ViewController ()<UITableViewDataSource,UITableViewDelegate>

@property (nonatomic,strong)UITableView *tableView;
@property (retain, nonatomic) NSMutableArray *items;
@end

@implementation ViewController

- (instancetype)init
{
    self = [super init];
    if (self) {
        UIBarButtonItem *right = [[UIBarButtonItem alloc]initWithTitle:@"Edit" style:UIBarButtonItemStylePlain target:self  action:@selector(setEditing:animated:)];
        self.navigationItem.rightBarButtonItem = right;

        UIBarButtonItem *left = [[UIBarButtonItem alloc]initWithTitle:@"删除" style:UIBarButtonItemStylePlain target:self action:@selector(leftBarButtonPressed)];
        self.navigationItem.leftBarButtonItem = left;
    }
    return self;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.tableView = [[UITableView alloc]initWithFrame:self.view.bounds];
    self.tableView.rowHeight = 50;
    self.tableView.allowsSelectionDuringEditing = YES;
    self.tableView.dataSource =self;
    self.tableView.delegate = self;
    [self.view addSubview:self.tableView];
    self.items = [NSMutableArray arrayWithCapacity:0];
    for (int i=0; i<50; i++) {
        Item *item = [[Item alloc] init];
        item.title = [NSString stringWithFormat:@"%d",i];
        item.isChecked = NO;
        [_items addObject:item];
    }
}

- (void)leftBarButtonPressed {
    NSLog(@"删除");
    NSMutableArray *array = [[NSMutableArray alloc]initWithArray:_items];
    for (int i = 0; i < array.count; i ++) {
        Item* item = [array objectAtIndex:i];
        if (item.isChecked) {
            [_items removeObject:item];
        }
    }
      [_tableView reloadData];
    NSLog(@"%ld",_items.count);
}

- (void) setEditing:(BOOL)editting animated:(BOOL)animated
{
    self.navigationItem.rightBarButtonItem.title = _tableView.editing ? @"Edit" : @"Done";
    [_tableView setEditing:!_tableView.editing animated:YES];
    [self.tableView performSelector:@selector(reloadData) withObject:nil afterDelay:0.3];
}

#pragma mark -
#pragma mark Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [_items count];
}

- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return UITableViewCellEditingStyleNone;
}

// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *CellIdentifier = @"Cell";

    FileItemTableCell *cell = (FileItemTableCell*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[FileItemTableCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier];
        cell.textLabel.font = [cell.textLabel.font fontWithSize:17];
    }

    cell.accessoryType = UITableViewCellAccessoryNone;
    cell.textLabel.textColor = [UIColor blackColor];

    Item* item = [_items objectAtIndex:indexPath.row];
    cell.textLabel.text = item.title;
    [cell setChecked:item.isChecked];
    return cell;;

}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    Item* item = [_items objectAtIndex:indexPath.row];

    if (self.tableView.editing)
    {
        FileItemTableCell *cell = (FileItemTableCell*)[tableView cellForRowAtIndexPath:indexPath];
        item.isChecked = !item.isChecked;
        [cell setChecked:item.isChecked];
    }
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
}

@end

使用对象感觉较之前的字典好理解些，也简单些

效果图：