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