Question

这是我的代码，可以正确处理UITableview Cell的多个选择。

现在，我的问题是在这里我创建了两个数组，其中一个存储数组数据，另一个存储选定的数据。但是，我想只使用一个数组。有人给了我解决方案，可以通过提供密钥使用KVC（valueForKeyPath）来完成。但我不知道该怎么做。

如果有人知道请帮助我。

#import "NewTableViewController.h"

@implementation NewTableViewController

@synthesize attTableData ;
@synthesize arrSelectionData ;

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.attTableData=[NSArray arrayWithObjects:@"Dhosa",@"Kahman",@"Dhokla",@"Handvo",@"chodafadi",@"Muthiya",@"Medu Vada",@"Patra",@"Thepla",@"Fafda",@"Gota",@"gathiya",@"Idali",@"Dalvada",@"Samosa",nil];

    self.arrSelectionData=[NSMutableArray array];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.attTableData count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] ;
    }
    if([self.arrSelectionData containsObject:indexPath])
    {
        [cell setAccessoryType:UITableViewCellAccessoryCheckmark];
    }
    else
    {
        [cell setAccessoryType:UITableViewCellAccessoryNone];
    }
    cell.textLabel.text=[self.attTableData objectAtIndex:indexPath.row];
    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];

    if([self.arrSelectionData containsObject:indexPath])
    {
        [self.arrSelectionData removeObject:indexPath];
    }
    else
    {
        [self.arrSelectionData addObject:indexPath];
    }

    [self.tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationNone];
    //[tableView reloadData];
}
@end

解决方案::

“配方列表”文件中的数据

[0]{
    Item = Thepla;
    selected = 0;
},
[1]
{
    Item = Gota;
    selected = 0;
},
[2]
{
    Item = Handvo;
    selected = 0;
},
[3]
{
    Item = Idali;
    selected = 0;
},
[4]
{
    Item = Dalvada;
    selected = 0;
},

现在我的TableViewController

#import "NewTableViewController.h"
#import "TableViewCell.h"

@implementation NewTableViewController
@synthesize attTableData ;


- (void)viewDidLoad
{
    [super viewDidLoad];

    NSString *path = [[NSBundle mainBundle] pathForResource:@"Recipe List" ofType:@"plist"];
    attTableData = [[NSMutableArray alloc]initWithContentsOfFile:path];

    attTableData = (NSMutableArray *)CFBridgingRelease(CFPropertyListCreateDeepCopy(kCFAllocatorDefault, (CFArrayRef)attTableData, kCFPropertyListMutableContainers));
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.attTableData count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"UserCell";
    TableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (!cell)
    {
        cell = [[TableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] ;
    }
    NSDictionary * dicTemp = [attTableData objectAtIndex:indexPath.row];

    //  NSNumber* attendingObject = [dicTemp objectForKey:@"selected"];
    if([dicTemp objectForKey:@"selected"] == [NSNumber numberWithBool:NO])
    {
        [cell setAccessoryType:UITableViewCellAccessoryNone];
    }
    else
    {
         [cell setAccessoryType:UITableViewCellAccessoryCheckmark];
    }

    cell.lbl.text=[[self.attTableData objectAtIndex:indexPath.row]objectForKey:@"Item"];
    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    NSMutableDictionary * dic = [attTableData objectAtIndex:indexPath.row];
    //NSNumber* attendingObject = [dic objectForKey:@"selected"];

    if ([dic objectForKey:@"selected"] == [NSNumber numberWithBool:NO])
    {
        [dic setValue:[NSNumber numberWithBool:YES] forKey:@"selected"];
    }
    else
    {
        [dic setValue:[NSNumber numberWithBool:NO] forKey:@"selected"];
    }
    [attTableData replaceObjectAtIndex:indexPath.row withObject:dic];
    [self.tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationNone];
}
@end

Answer 1

如果你想使用单个数组，而不是像这样做

self.attTableData=[NSArray arrayWithObjects:@"Dhosa",@"Kahman",@"Dhokla",@"Handvo",@"chodafadi",@"Muthiya",@"Medu Vada",@"Patra",@"Thepla",@"Fafda",@"Gota",@"gathiya",@"Idali",@"Dalvada",@"Samosa",nil];

为您的商品创建模型类

//pseudo code
class Item{
  name = "Dhosa"
  selected = false
}

所以attTableData将是

 self.attTableData=[Item1, Item2];

现在，当您进行选择时，您可以设置项目的selected属性。在cellForRow中，选中此属性并设置setAccessoryType。

如何使用单个NSArray管理UITableView的多个单元格选择？

1 个答案: