ios UITableView表视图(2)

tableView编辑

1、让tableView处于编辑状态

<span style="font-size:18px;color:#330033;">#import "RootViewController.h"
#import "RootView.h"
@interface RootViewController ()<UITableViewDataSource,UITableViewDelegate>
{
    UITableViewCellEditingStyle _style;
}
@property(nonatomic,strong)RootView *myview;
@property(nonatomic,strong)NSMutableArray *groupArray;
@end

@implementation RootViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self)
    {
        self.myview = [[RootView alloc] initWithFrame:[UIScreen mainScreen].bounds];
    }
    return self;
}
-(void)loadView
{
    self.view = self.myview;
}
- (void)viewDidLoad
{
    [super viewDidLoad];
    self.groupArray = [NSMutableArray array];
    //设置代理
    self.myview.TableView.dataSource = self;
    //设置代理
    self.myview.TableView.delegate = self;
    [self addAction];
    
}
-(void)addAction
{   //创建一个barbutton按钮,(删除按钮)
    UIBarButtonItem *deleteButton = [[UIBarButtonItem alloc] initWithTitle:@"删除" style:(UIBarButtonItemStyleDone) target:self action:@selector(daleteButton:)];
    self.navigationItem.leftBarButtonItem = deleteButton;
    UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithTitle:@"添加" style:(UIBarButtonItemStyleDone) target:self action:@selector(addButton:)];
    self.navigationItem.rightBarButtonItem = addButton;

    //创建一个假数据
    for(int i = 0;i < 3;i++)
    {
        NSMutableArray *tempArray = [NSMutableArray array];
        for(int j = 0;j < 5;j++)
        {
            [tempArray addObject:[NSString stringWithFormat:@"第%d组,第%d个人",i,j]];
        }
        [self.groupArray addObject:tempArray];
    }
//    NSLog(@"%@",self.groupArray[0]);
    
    
}

//编辑状态
//删除按钮
-(void)daleteButton:(UIBarButtonItem *)sender
{
    //当点击"删除"按钮的时候,触发事件,给他一个编辑状态(删除状态)
    _style = UITableViewCellEditingStyleDelete;
    //一个BOOL 接收此时的编辑状态
    BOOL flag = self.myview.TableView.editing;
    //设置编辑状态
    [self.myview.TableView setEditing:!flag animated:YES];
    
}
//添加按钮
-(void)addButton:(UIBarButtonItem *)sender
{
    _style = UITableViewCellEditingStyleInsert;
    BOOL flag = self.myview.TableView.editing;
    [self.myview.TableView setEditing:!flag animated:YES];
    
}
/*-----------------------UITableViewDataSource-----------------------------*/

//下面的方法都是遵循UITableViewDataSource协议的,所以先在viewDidLoad先去设置代理
//设置几个分区
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return self.groupArray.count;
}
//设置一个分区里面有几行
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.groupArray[section] count];
}


//设置cell
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    //标识
    static NSString *cell_id = @"cell_id";
    //创建cell
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cell_id];
    //判断在重用池中有没有cell,如果没有就创建
    if (nil == cell)
    {
        cell = [[UITableViewCell alloc] initWithStyle:(UITableViewCellStyleValue1) reuseIdentifier:cell_id];
    }
    //给cell设置标题
    cell.textLabel.text = self.groupArray[indexPath.section][indexPath.row];
   
    //给cell设置副标题
    cell.detailTextLabel.text = @"我中奖了";
    
    return cell;
}
//指定哪些行可以被编辑
-(BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
    //例如让单行处于被编辑状态
    if(indexPath.row % 2)
    {
        return NO;
    }
    return YES;
}
//编辑样式(添加,删除)
-(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return _style;
}

//编辑完成
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    //当编辑状态为添加状态的时候
    if(editingStyle == UITableViewCellEditingStyleDelete)
    {
    //删除(确定哪个分区的哪一行)
    [self.groupArray[indexPath.section]removeObjectAtIndex:indexPath.row];
    //刷新数据
    [tableView reloadData];
    //刷新数据动画
//    [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:(UITableViewRowAnimationFade)];
    }
    else if (editingStyle == UITableViewCellEditingStyleInsert)
    {
        NSString *string = @"测试数据";
        //修改数据源(实现添加)
        [self.groupArray[indexPath.section]insertObject:string atIndex:indexPath.row+1];
        
        //修改UI
        //        [tableView reloadData];
        //        [tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:(UITableViewRowAnimationTop)];
        //添加数据到显示到添加行下面
        NSIndexPath *indes = [NSIndexPath indexPathForRow:indexPath.row+1 inSection:indexPath.section];
        //刷新数据带动画效果
        [tableView insertRowsAtIndexPaths:@[indes] withRowAnimation:(UITableViewRowAnimationTop)];
        
    }
    

}
/*-------------------------------tableView移动----------------------------------------*/
//指定哪些被移动
-(BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
    
    return YES;
}
//移动完成
-(void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath
{
    
    //记录
    id obj = self.groupArray[sourceIndexPath.section][sourceIndexPath.row];
    
    //移除
    [self.groupArray[sourceIndexPath.section]removeObjectAtIndex:sourceIndexPath.row];
    //添加
    [self.groupArray[destinationIndexPath.section]insertObject:obj atIndex:destinationIndexPath.row];
    //更新数据源
    [tableView reloadData];
    
    
}
//限制移动区域
-(NSIndexPath*)tableView:(UITableView *)tableView targetIndexPathForMoveFromRowAtIndexPath:(NSIndexPath *)sourceIndexPath toProposedIndexPath:(NSIndexPath *)proposedDestinationIndexPath
{    //先判断源和目的的分组是否相同,
    if (sourceIndexPath.section != proposedDestinationIndexPath.section)
    {
        //如果不同,返回源的起始位置
        return sourceIndexPath;
    }
    else
    {
        //如果相同,返回目的的位置
        return proposedDestinationIndexPath;
    }
}
</span>