UITbableView做爲列表展現信息,除了展現的功能,有時還會用到刪除,好比購物車、收藏列表等。web
單行刪除功能能夠直接使用系統自帶的刪除功能,當橫向輕掃cell時,右側出現紅色的刪除按鈕,點擊刪除當前cell。或者讓表格進入編輯狀態後,點擊左側的紅色按鈕,右側出現刪除按鈕,刪除,以下圖所示。單行自帶刪除已經在前面文章中進行過講解,須要的能夠去查閱。數組
多選刪除是點擊編輯按鈕,讓表格進入編輯狀態後,每行的左側出現一個小圓圈,當點擊行的時候,能夠選中該行或者取消選中該行,當點擊按鈕肯定刪除的時候纔會把選中的行所有刪除掉,如圖所示。ide
使用系統多選刪除功能的步驟:atom
一、讓tableView進入編輯狀態,也就是設置它的editing爲YESspa
二、返回編輯模式,也就是實現UITableViewDelegate中的tableview:editingStyleForRowAtIndexPath:方法,在裏面返回UITableViewCellEditingStyleDelete | UITableViewCellEditingStyleInsert。若是不實現,默認返回的就是刪除模式3d
三、實現UITableViewDelegate中的tableView: didSelectRowAtIndexPath: 和tableView: didDeselectRowAtIndexPath:方法。在裏面對選中的商品集合中的數據進行修改code
四、點擊刪除時,將選中商品數據從列表對應總商品集合中刪除掉,並刷新界面。orm
代碼:對象
// Goods.h // 購物車表格刪除 // // Created by jerei on 15-1-7. // Copyright (c) 2015年 jerei. All rights reserved. // #import <Foundation/Foundation.h> @interface Goods : NSObject @property (nonatomic, copy) NSString *icon; @property (nonatomic, copy) NSString *name; @property (nonatomic, copy) NSString *details; -(id)initWithDic:(NSDictionary*)dic; +(id)goodsWithDic:(NSDictionary*)dic; @end // // Goods.m // 購物車表格刪除 // // Created by jerei on 15-1-7. // Copyright (c) 2015年 jerei. All rights reserved. // #import "Goods.h" @implementation Goods -(id)initWithDic:(NSDictionary *)dic { if (self = [super init]) { self.icon = [dic objectForKey:@"icon"]; self.name = [dic objectForKey:@"name"]; self.details = [dic objectForKey:@"details"]; } return self; } +(id)goodsWithDic:(NSDictionary *)dic { Goods *good = [[Goods alloc] initWithDic:dic]; return good; } @end // // ViewController.m // JRTableView多選刪除 // // Created by jerehedu on 15/6/11. // Copyright (c) 2015年 jerehedu. All rights reserved. // #import "ViewController.h" #import "Goods.h" @interface ViewController ()<UITableViewDataSource, UITableViewDelegate> { UITableView *_tableView; //列表 NSMutableArray *_goodsAry; //商品數組 NSMutableArray *_selectArray; //選中的數組 UIButton *_editBtn; //編輯按鈕 } @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; //初始化選中數組 _selectArray = [NSMutableArray array]; //設置界面 [self setTheInterface]; //取數據 [self getGoodsInfoFromFile]; } #pragma mark - 取數據 -(void)getGoodsInfoFromFile{ NSArray *ary = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"ShoppingGoodsList" ofType:@"plist"]]; //把數據存到模型對象中,而後把對象存到數組中 _goodsAry = [NSMutableArray array]; for (int i=0; i<ary.count; i++) { Goods *good = [Goods goodsWithDic:ary[i]]; [_goodsAry addObject:good]; } } #pragma mark - 初始化界面 -(void)setTheInterface{ //bg UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)]; imgView.image = [UIImage imageNamed:@"redup.png"]; [self.view addSubview:imgView]; //添加標題 UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 20, self.view.frame.size.width, 44)]; titleLabel.text = @"購物車"; titleLabel.textAlignment = NSTextAlignmentCenter; titleLabel.textColor = [UIColor whiteColor]; [self.view addSubview:titleLabel]; //添加編輯按鈕 _editBtn = [UIButton buttonWithType:UIButtonTypeCustom]; _editBtn.frame = CGRectMake(self.view.frame.size.width-60, 25, 50, 34); [_editBtn setTitle:@"編輯" forState:UIControlStateNormal]; [_editBtn setTitle:@"刪除" forState:UIControlStateSelected]; _editBtn.titleLabel.font = [UIFont systemFontOfSize:15]; _editBtn.backgroundColor = [UIColor colorWithRed:0.8 green:0.8 blue:0.8 alpha:0.5]; [self.view addSubview:_editBtn]; [_editBtn addTarget:self action:@selector(clickEditBtn:) forControlEvents:UIControlEventTouchUpInside]; //添加tableview _tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 64, self.view.frame.size.width, self.view.frame.size.height-64)]; _tableView.dataSource = self; _tableView.delegate = self; [self.view addSubview:_tableView]; _tableView.rowHeight = 110; } #pragma mark 數據源 返回有幾行 -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return _goodsAry.count; } #pragma mark 每行顯示內容 -(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *idGood = @"goods"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:idGood]; if (cell==nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:idGood]; cell.detailTextLabel.numberOfLines = 6; cell.detailTextLabel.textColor = [UIColor brownColor]; } Goods *good = _goodsAry[indexPath.row]; cell.imageView.image = [UIImage imageNamed:good.icon]; cell.textLabel.text = good.name; cell.detailTextLabel.text = good.details; return cell; } #pragma mark 選中行 -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { if (!_tableView.editing) return; Goods *good = [_goodsAry objectAtIndex:indexPath.row]; if (![_selectArray containsObject:good]) { [_selectArray addObject:good]; } } #pragma mark 取消選中行 -(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath { if (!_tableView.editing) return; Goods *good = [_goodsAry objectAtIndex:indexPath.row]; if ([_selectArray containsObject:good]) { [_selectArray removeObject:good]; } } #pragma mark 點擊編輯按鈕 - (IBAction)clickEditBtn:(UIButton *)sender { BOOL flag = _tableView.editing; if (flag) { //刪除的操做 //獲得刪除的商品索引 NSMutableArray *indexArray = [NSMutableArray array]; for (Goods *good in _selectArray) { NSInteger num = [_goodsAry indexOfObject:good]; NSIndexPath *path = [NSIndexPath indexPathForRow:num inSection:0]; [indexArray addObject:path]; } //修改數據模型 [_goodsAry removeObjectsInArray:_selectArray]; [_selectArray removeAllObjects]; //刷新 [_tableView deleteRowsAtIndexPaths:indexArray withRowAnimation:UITableViewRowAnimationFade]; _tableView.editing = NO; _editBtn.selected = NO; }else { //開始選擇行 [_selectArray removeAllObjects]; _tableView.editing = YES; _editBtn.selected = YES; } } #pragma mark 返回編輯模式,默認爲刪除模式 -(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath { return UITableViewCellEditingStyleDelete | UITableViewCellEditingStyleInsert; } @end