UITbableView作為列表展示信息,除了展示的功能,有時還會用到刪除,比如購物車、收藏列表等。
單行刪除功能可以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后,點擊左側的紅色按鈕,右側出現刪除按鈕,刪除,如下圖所示。單行自帶刪除已經在前面文章中進行過講解,需要的可以去查閱。
多選刪除是點擊編輯按鈕,讓表格進入編輯狀態后,每行的左側出現一個小圓圈,當點擊行的時候,可以選中該行或者取消選中該行,當點擊按鈕確定刪除的時候才會把選中的行全部刪除掉,如圖所示。
使用系統多選刪除功能的步驟:
1、讓tableView進入編輯狀態,也就是設置它的editing為YES
2、返回編輯模式,也就是實現UITableViewDelegate中的tableview:editingStyleForRowAtIndexPath:方法,在里面返回UITableViewCellEditingStyleDelete | UITableViewCellEditingStyleInsert。如果不實現,默認返回的就是刪除模式
3、實現UITableViewDelegate中的tableView: didSelectRowAtIndexPath: 和tableView: didDeselectRowAtIndexPath:方法。在里面對選中的商品集合中的數據進行修改
4、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,并刷新界面。
代碼:
// 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,然后把對象存到數組中 _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) { //刪除的操作 //得到刪除的商品索引 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,默認為刪除模式-(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{ return UITableViewCellEditingStyleDelete | UITableViewCellEditingStyleInsert;}@end
新聞熱點
疑難解答