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