UI3_UITableViewDelete(多选)

//  AppDelegate.m
//  UI3_UITableViewDelete(多选)
//
//  Created by zhangxueming on 15/7/14.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import "AppDelegate.h"
#import "ViewController.h"


@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    ViewController *root = [[ViewController alloc] init];
    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:root];
    self.window.rootViewController = nav;
    [self.window makeKeyAndVisible];
    
    return YES;
}

//
//  ViewController.h
//  UI3_UITableViewDelete(多选)
//
//  Created by zhangxueming on 15/7/14.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UITableViewDataSource, UITableViewDelegate>


@end


//
//  ViewController.m
//  UI3_UITableViewDelete(多选)
//
//  Created by zhangxueming on 15/7/14.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
{
    UITableView *_tableView;
    //数据源
    NSMutableArray *_dataList;
    //要删除的数据
    NSMutableArray *_removeList;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    [self creatDataSource];
    [self creatUI];
}

//创建数据源
- (void)creatDataSource
{
    _dataList = [NSMutableArray array];
    _removeList = [NSMutableArray array];
    NSMutableArray *boys = [NSMutableArray array];
    for (int i=0; i<20; i++) {
        NSString *name = [NSString stringWithFormat:@"boy:%d", i+1];
        [boys addObject:name];
    }
    [_dataList addObject:boys];
    
    NSMutableArray *grils = [NSMutableArray array];
    for (int i= 0; i<10; i++) {
        NSString *name = [NSString stringWithFormat:@"gril:%d", i+1];
        [grils addObject:name];
    }
    [_dataList addObject:grils];
}

//创建UI

- (void)creatUI
{
    _tableView = [[UITableView alloc] initWithFrame:self.view.frame style:UITableViewStylePlain];
    
    //设置代理
    _tableView.delegate = self;
    _tableView.dataSource = self;
    
    //设置尾视图
    UIView *footerView = [[UIView alloc] initWithFrame:CGRectMake(0,0, self.view.frame.size.width, 44)];
    footerView.backgroundColor = [UIColor cyanColor];
    _tableView.tableFooterView = footerView;
    NSLog(@"view = %@", _tableView.tableFooterView);
    //设置头视图
    UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.height, 44)];
    headerView.backgroundColor = [UIColor yellowColor];
    _tableView.tableHeaderView = headerView;
    
    //添加Btn
    
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
    btn.frame =CGRectMake(50, 0, footerView.frame.size.width-100,44);
    [btn setTitle:@"remove" forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(removeData) forControlEvents:UIControlEventTouchUpInside];
    [footerView addSubview:btn];
    
    //设置编辑按钮
    self.navigationItem.leftBarButtonItem = self.editButtonItem;
    
    
    [self.view addSubview:_tableView];

}

//进入编辑状态

- (void)setEditing:(BOOL)editing animated:(BOOL)animated
{
    [super setEditing:editing animated:YES];
    [_tableView setEditing:editing animated:YES];
}

//Editing

- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
    //同时设置insert 及 delete 自动进入多选状态
    return  UITableViewCellEditingStyleDelete|UITableViewCellEditingStyleInsert;
}

//删除数据
- (void)removeData
{
    for (int i=0; i<2; i++) {
        NSArray *array = [[_dataList objectAtIndex:i] copy];
        NSInteger rows  = array.count;
        for (int j=0; j<rows; j++) {
            NSString *obj = [array objectAtIndex:j];
            if ([_removeList containsObject:obj]) {
                [[_dataList objectAtIndex:i] removeObject:obj];
            }
        }
    }
    [_tableView reloadData];
}


#pragma mark   ---UITableView---

//返回分区个数
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return _dataList.count;
}

//返回每个分区有多少行

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

//返回UITableViewCell

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellID = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellID];
    if (!cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellID];
    }
    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    cell.textLabel.text = [[_dataList objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
    return cell;
}

//选中状态
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    
    if (tableView.editing) {
        NSString *obj = [[_dataList objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
        if (![_removeList containsObject: obj])
        {
            [_removeList addObject:obj];
        }
    }
}

//结束选中状态
- (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (tableView.editing) {
        NSString *obj = [[_dataList objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
        if ([_removeList containsObject:obj]) {
            [_removeList removeObject:obj];
        }
    }
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end