Day.03.03 UITableView 表示图编辑模式

#import "ViewController.h"

#define kScreenW [UIScreen mainScreen].bounds.size.width
#define kScreenH [UIScreen mainScreen].bounds.size.height

@interface ViewController ()<UITableViewDelegate,UITableViewDataSource>

@property (nonatomic,strong)NSMutableArray *datalist;

@property (nonatomic,strong)UITableView *tableView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.view.backgroundColor = [UIColor greenColor];
    
    _datalist = [NSMutableArray arrayWithArray:[UIFont familyNames]];
    
    _tableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 64, kScreenW, kScreenH-64) style:UITableViewStylePlain];
    
    _tableView.dataSource = self;
    
    _tableView.delegate = self;
    
    [self.view addSubview:_tableView];
    
}

//进入编辑模式
- (IBAction)editor:(UIButton *)sender {
    
    sender.selected = !sender.selected;
    
    //表视图开启编辑模式
    [_tableView setEditing:sender.selected animated:YES];
    
}

//进入多选模式
- (IBAction)multipleSelect:(UIButton *)sender {
    
    
    if (sender.selected == YES) {
        
        
        //1.获取所有选中的单元格下标
        NSArray *indexPaths = [_tableView indexPathsForSelectedRows];
        
        //2.删除数据
        /**
         *  为了防止下标越界,所以采用倒序遍历并删除
         */
        
        for (NSInteger i = indexPaths.count-1; i>=0; i--) {
            
            NSIndexPath *indexP = indexPaths[i];
            
            [_datalist removeObjectAtIndex:indexP.row];
            
        }
        
        //3.删除单元格
        [_tableView deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];
    }
    
    
    sender.selected = !sender.selected;
    
    //在编辑期间允许单元格多选 --> 开启该选项 插入单元格和删除单个单元格 功能就不存在了
    _tableView.allowsMultipleSelectionDuringEditing = sender.selected;
    
    //表视图开启编辑模式
    [_tableView setEditing:sender.selected animated:YES];
    
    NSLog(@"%@",_datalist);
    
}

//
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{
    
    if (indexPath.row == 0) {
        
        return UITableViewCellEditingStyleInsert;
    }
    
    return UITableViewCellEditingStyleDelete;

    //奇数行 删除 ;偶数行 插入
//    return indexPath.row%2==0?UITableViewCellEditingStyleInsert:UITableViewCellEditingStyleDelete;
}



//是否开启单元格的移动权限
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath{

    if (indexPath.row == 0) {
        
        return NO;
    }
    
    return YES;
}

//是否开启单元格的编辑权限
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath{

    //如果是0的话,第一行的加号不会显示
    if (indexPath.row == 1) {
        
        return NO;
    }
    
    return YES;
}


//移动单元格调用
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath{

    NSLog(@"source:%ld destination:%ld",sourceIndexPath.row,destinationIndexPath.row);
    
    if (sourceIndexPath.row <= destinationIndexPath.row) {
        
        [_datalist insertObject:_datalist[sourceIndexPath.row] atIndex:destinationIndexPath.row+1];
        
        [_datalist removeObjectAtIndex:sourceIndexPath.row];
        
    }else{
    
        [_datalist insertObject:_datalist[sourceIndexPath.row] atIndex:destinationIndexPath.row];
        
        [_datalist removeObjectAtIndex:sourceIndexPath.row+1];
    }

}


//编辑模式 事件方法 插入和删除
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{

    /**
     *      UITableViewCellEditingStyleNone,
            UITableViewCellEditingStyleDelete,  删除
            UITableViewCellEditingStyleInsert   插入

     */
    
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        
        //删除单元格的代码
        
        //1.删除数据
        
        [_datalist removeObjectAtIndex:indexPath.row];
        
        //2.删除单元格
        
        /**
         *  UITableViewRowAnimationFade,
         UITableViewRowAnimationRight,
         UITableViewRowAnimationLeft,
         UITableViewRowAnimationTop,
         UITableViewRowAnimationBottom,
         UITableViewRowAnimationNone,
         UITableViewRowAnimationMiddle,
         UITableViewRowAnimationAutomatic = 100

         */
        
        [_tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
        
        
        
    }
    
    if (editingStyle == UITableViewCellEditingStyleInsert) {
        
//        [_datalist insertObject:@"1234567" atIndex:1];
//        
//        [tableView reloadData];
        
        
        //1.插入数据
        [_datalist insertObject:@"1234567" atIndex:1];
        
        //2.插入单元格
        
        NSIndexPath *ip = [NSIndexPath indexPathForRow:1 inSection:0];
        
        [tableView insertRowsAtIndexPaths:@[ip] withRowAnimation:UITableViewRowAnimationTop];
        
    }


}



#pragma mark --UITableViewDataSource

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    
    return _datalist.count;
    
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    
    static NSString *identy = @"cell";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identy];
    
    if (cell == nil) {
        
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identy];
    }
    
    cell.textLabel.text = [_datalist objectAtIndex:indexPath.row];
    
    return cell;
    
}

@end

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