iOS cell排序

来源:互联网 发布:holy cross学院知乎 编辑:程序博客网 时间:2024/06/16 18:55
1、让tableView进入编辑状态,也就是设置它的editing为YES
2、返回编辑模式,也就是实现UITableViewDelegate中的tableview:editingStyleForRowAtIndexPath:方法,在里面返回UITableViewCellEditingStyleNone模式。如果不实现,默认返回的就是删除模式
3、实现tableView:moveRowAtIndexPath:toIndexPath方法,只要实现该方法,就能实现单元格的拖动排序,但只是实现了表面的排序,并没有修改真实地数据

4、在方法中完成数据模型的更新

#import "ViewController.h"#import "Goods.h"@interface ViewController ()<UITableViewDataSource, UITableViewDelegate>{    UITableView *_tableView; //列表        NSMutableArray *_goodsAry; //商品数组        UIButton *_editBtn; //编辑按钮}@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];        //添加标题    UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 20, self.view.frame.size.width, 44)];    titleLabel.text = @"购物车";    titleLabel.textAlignment = NSTextAlignmentCenter;    titleLabel.backgroundColor = [UIColor redColor];    titleLabel.textColor = [UIColor whiteColor];    [self.view addSubview:titleLabel];        //添加编辑按钮    _editBtn = [UIButton buttonWithType:UIButtonTypeCustom];    _editBtn.frame = CGRectMake(self.view.frame.size.width-60, 25, 50, 34);    [_editBtn setTitle:@"编辑" forState:UIControlStateNormal];    [_editBtn setTitle:@"完成" 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];        //取数据    NSArray *ary = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"ShoppingGoodsList" ofType:@"plist"]];        //把数据存到模型对象中,然后把对象存到数组中    _goodsAry = [NSMutableArray array];    for (int i=0; i<ary.count; i++) {        Goods *good = [Goods goodsWithDic:ary[i]];        [_goodsAry addObject:good];    }}#pragma mark 数据源  返回有几行-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{    return _goodsAry.count;}#pragma mark 每行显示内容-(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];    }        Goods *good = _goodsAry[indexPath.row];        cell.imageView.image = [UIImage imageNamed:good.icon];    cell.textLabel.text = good.name;    cell.detailTextLabel.text = good.details;    cell.detailTextLabel.numberOfLines = 6;    cell.detailTextLabel.textColor = [UIColor brownColor];        return cell;}#pragma mark 选中行-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{    // 取消选中状态    [tableView deselectRowAtIndexPath:indexPath animated:YES];}#pragma mark 设置行高-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{    return 110;}#pragma mark 点击编辑按钮- (IBAction)clickEditBtn:(UIButton *)sender {        //设置tableview编辑状态    BOOL flag = !_tableView.editing;    [_tableView setEditing:flag animated:YES];    _editBtn.selected = flag;}#pragma mark 选择编辑模式,添加模式很少用,默认是删除-(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{    return UITableViewCellEditingStyleNone;}#pragma mark 排序 当移动了某一行时候会调用//编辑状态下,只要实现这个方法,就能实现拖动排序-(void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath{    // 取出要拖动的模型数据    Goods *goods = _goodsAry[sourceIndexPath.row];    //删除之前行的数据    [_goodsAry removeObject:goods];    // 插入数据到新的位置    [_goodsAry insertObject:goods atIndex:destinationIndexPath.row];}@end


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