Ios 访问CellForRowatineXpath之外的自定义单元格属性

我想要一些像下图这样的东西。用户可以单击+或-按钮，增加或减少的计数显示在UILabel中，即下图中的1。

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我知道如何实现自定义表视图单元格。我也知道如何实现选择器。但是我需要根据点击的按钮设置标签文本，这才是问题所在。 如何更新单击的按钮和设置自定义单元格的UILabel文本，从cellForRowAtIndexPathwith添加-减去功能外部

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    //self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;

     static NSString *simpleTableIdentifier = @"ProductListVIICell";

     ProductListVIICell *cell = (ProductListVIICell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    if (cell == nil)
    {
         NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"ProductListVIICell" owner:self options:nil];
         cell = [nib objectAtIndex:0];
     } ....................................
        cell.btnMinus.tag = indexPath.row;
        cell.btnPlus.tag = indexPath.row;

        [cell.btnPlus addTarget:self action:@selector(addItem:) forControlEvents:UIControlEventTouchUpInside];
        [cell.btnMinus addTarget:self action:@selector(deleteItem:) forControlEvents:UIControlEventTouchUpInside];

        cell.lblCount.tag = [[NSString stringWithFormat:@"%d%d",addBtnClickCount,addBtnClickCount] integerValue];


        return cell;
    }

我需要在这里做事，但没有得到我想要的<代码>单元格.lbltite.text不工作

  #pragma mark - UIButton selector

-(void)addItem:(UIButton*)button {
    itemCount++;
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:button.tag inSection:1];
    ProductListVIICell *cell = (ProductListVIICell *)[self.tableView cellForRowAtIndexPath:indexPath];
      cell.lblCount.textColor = [UIColor redColor];
     cell.lblTitle.text = [NSString stringWithFormat:@"%d",itemCount];

    NSIndexPath* rowToReload = [NSIndexPath indexPathForRow:[button tag] inSection:0];
    NSArray* rowsToReload = [NSArray arrayWithObjects:rowToReload, nil];
    [self.tableView reloadRowsAtIndexPaths:rowsToReload withRowAnimation:UITableViewRowAnimationNone];
     NSLog(@"%d",itemCount);
    [self.tableView reloadData];


}

-(void)deleteItem:(UIButton*)button {
    itemCount--;
     NSIndexPath *indexPath = [NSIndexPath indexPathForRow:button.tag inSection:1];
    ProductListVIICell *cell = (ProductListVIICell *)[self.tableView cellForRowAtIndexPath:indexPath];

    cell.lblCount.textColor = [UIColor redColor];
    cell.lblTitle.text = [NSString stringWithFormat:@"%d",itemCount];

    NSIndexPath* rowToReload = [NSIndexPath indexPathForRow:[button tag] inSection:0];
    NSArray* rowsToReload = [NSArray arrayWithObjects:rowToReload, nil];
    [self.tableView reloadRowsAtIndexPaths:rowsToReload withRowAnimation:UITableViewRowAnimationNone];
     NSLog(@"%d",itemCount);
    [self.tableView reloadData];

}

这些链接也很有用

但它仅适用于UITableViewCell，而不是自定义单元格

我能够使用以下方法解决我的问题

@interface ProductListVC ()
{
    int count;
    bool addBtnClicked;
    bool minusBtnClicked;


}

@property (strong,nonatomic) NSMutableArray* quantityArray; //stores label
@property (strong,nonatomic) NSMutableArray* quantityLabelArray; //stores label

- (void)viewDidLoad {

    [super viewDidLoad];

    _quantityLabelArray = [[NSMutableArray alloc] init];
     _quantityArray = [[NSMutableArray alloc] init];

//determine num of row prevent index 2 beyond bounds for empty array error i.e insert straight to let's say index 3
    for (int i=0; i <=[_productArray count]; i++) {
            [_quantityArray addObject:@"0"];

        }
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
................

if (!_quantityArray || !_quantityArray.count){
        cell.lblCount.text = [NSString stringWithFormat:@"%d", 0];

    }else{
        cell.lblCount.text = [_quantityArray objectAtIndex:indexPath.row];
     }
     [_quantityLabelArray addObject:cell.lblCount];


    if (addBtnClicked || minusBtnClicked) {
        //If add or minu button is reloading the cell

        cell.lblCount.text = [_quantityArray objectAtIndex:indexPath.row];
        //NSLog(@"%@",cell.lblCount.text);
        [_quantityLabelArray replaceObjectAtIndex:indexPath.row withObject:cell.lblCount];
        addBtnClicked = NO;
        minusBtnClicked = NO;

    }
    else
    {

    }

    cell.btnMinus.tag = indexPath.row;
    cell.btnPlus.tag = indexPath.row;
    cell.lblCount.tag = indexPath.row;

    [cell.btnPlus addTarget:self action:@selector(addItem:) forControlEvents:UIControlEventTouchUpInside];
    [cell.btnMinus addTarget:self action:@selector(deleteItem:) forControlEvents:UIControlEventTouchUpInside];

    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    return cell;
}



#pragma mark - UIButton selector

-(void)addItem:(UIButton*)button

{

     NSLog(@"btn tag %ld",(long)[button tag]);
     NSLog(@"quantitylblarry %@",_quantityLabelArray);

        UILabel* lblShowCount = [_quantityLabelArray objectAtIndex:[button tag]];
        if ([lblShowCount.text integerValue]< 10) {
            count = count+1;
            lblShowCount.text = [NSString stringWithFormat:@"%ld", [lblShowCount.text integerValue]+1];
        }

     NSLog(@"quantity array count %lu",(unsigned long)_quantityArray.count);

        if (_quantityArray.count > [button tag] ) {

            [_quantityArray removeObjectAtIndex:[button tag]];
            [_quantityArray insertObject:lblShowCount.text atIndex:[button tag]];
        }

        else{

            [_quantityArray insertObject:lblShowCount.text atIndex:[button tag]];
        }
        addBtnClicked = YES;

        NSLog(@"quantity array %@",_quantityArray);
        NSIndexPath* rowToReload = [NSIndexPath indexPathForRow:[button tag] inSection:0];
        NSArray* rowsToReload = [NSArray arrayWithObjects:rowToReload, nil];
        [self.tableView reloadRowsAtIndexPaths:rowsToReload withRowAnimation:UITableViewRowAnimationNone];

    }





-(void)deleteItem:(UIButton*)button{

     NSLog(@"%ld",(long)[button tag]);
    UILabel* lblShowCount = [_quantityLabelArray objectAtIndex:[button tag]];


        if ([lblShowCount.text integerValue]>=1) {
            count = count-1;
            lblShowCount.text = [NSString stringWithFormat:@"%ld", [lblShowCount.text integerValue]-1];

        }

        NSLog(@"%lu",(unsigned long)_quantityArray.count);

        if (_quantityArray.count > [button tag] ) {
            [_quantityArray removeObjectAtIndex:[button tag]];
            [_quantityArray insertObject:lblShowCount.text atIndex:[button tag]];
        }
        else{
            [_quantityArray insertObject:lblShowCount.text atIndex:[button tag]];

        }
        NSLog(@"%@",_quantityArray);
        minusBtnClicked =YES;

        NSLog(@"quantity array %@",_quantityArray);
        NSIndexPath* rowToReload = [NSIndexPath indexPathForRow:[button tag] inSection:0];
        NSArray* rowsToReload = [NSArray arrayWithObjects:rowToReload, nil];
        [self.tableView reloadRowsAtIndexPaths:rowsToReload withRowAnimation:UITableViewRowAnimationNone];

 }

@interface ProductListVC（）
{
整数计数；
bool addbtcled；
bool minusbtcled；
}
@属性（强，非原子）NSMutableArray*quantityArray//商店标签
@属性（强，非原子）NSMutableArray*quantityLabelArray//商店标签
-（无效）viewDidLoad{
[超级视图下载]；
_quantityLabelArray=[[NSMutableArray alloc]init]；
_quantityArray=[[NSMutableArray alloc]init]；
//确定行数防止索引2超出空数组错误的界限，即直接插入到索引3
对于（int i=0；i[按钮标记]）{
[\u quantityArray removeObjectAtIndex:[按钮标记]]；
[\u quantityArray insertObject:lblShowCount.text atIndex:[按钮标记]]；
}
否则{
[\u quantityArray insertObject:lblShowCount.text atIndex:[按钮标记]]；
}
addBtnClicked=是；
NSLog（@“数量数组%@”，_quantityArray）；
nsindepath*rowToReload=[nsindepath indexPathForRow:[button tag]instation:0]；
NSArray*rowsToReload=[NSArray数组及其对象：rowsToReload，nil]；
[self.tableView重新加载rowsatindexpaths:rowstorealoadwithrownanimation:uitableviewrownanimationnone]；
}
-（无效）删除项：（UIButton*）按钮{
NSLog（@“%ld”（长）[按钮标记]）；
UILabel*lblShowCount=[\u quantityLabelArray对象索引：[按钮标记]]；
如果（[lblShowCount.text integerValue]>=1）{
计数=计数-1；
lblShowCount.text=[NSString stringWithFormat:@“%ld”，[lblShowCount.text integerValue]-1]；
}
NSLog（@“%lu”，（无符号长）\u quantityArray.count）；
如果（_quantityArray.count>[按钮标记]）{
[\u quantityArray removeObjectAtIndex:[按钮标记]]；
[\u quantityArray insertObject:lblShowCount.text atIndex:[按钮标记]]；
}
否则{
[\u quantityArray insertObject:lblShowCount.text atIndex:[按钮标记]]；
}
NSLog（@“%@”，_quantityArray）；
minusBtnClicked=是；
NSLog（@“数量数组%@”，_quantityArray）；
nsindepath*rowToReload=[nsindepath indexPathForRow:[button tag]instation:0]；
NSArray*rowsToReload=[NSArray数组及其对象：rowsToReload，nil]；
[self.tableView重新加载rowsatindexpaths:rowstorealoadwithrownanimation:uitableviewrownanimationnone]；
}

最好使用自定义单元格。选中此项或此项，则需要将委托添加到此单元格，以便可以与ViewController同步数量

i、 e

更新

---

如果您有一个自定义单元格，您可以添加一个

UILabel

出口，并通过

+/-

按钮修改其文本，所有这些代码都将位于

CustomTableViewCell.m

-(void)addItem:(UIButton*)button {    
    self.itemQuantity++; 
    [self updateQuantity];
}

-(void)deleteItem:(UIButton*)button {
    self.itemQuantity--;
    [self updateQuantity];
}
- (void)updateQuantity{
    self.lblCount.text = [NSStirng stringWithFormat:@"%d", self.itemQuantity];
    [self.delegate updateItemAtIndex:self.itemIndex withQuantity:self.itemQuantity];
}

更新：完整解决方案

1。型号

@interface Item : NSObject
@property (nonatomic, strong) NSString *title;
@property (nonatomic) NSInteger quantity;
@end

@implementation Item

@end

@interface CustomItemTableViewCell : UITableViewCell

@property (nonatomic, weak) IBOutlet UILabel *lblTitle;
@property (nonatomic, weak) IBOutlet UILabel *lblCount;
@property (nonatomic, assign) Item *item;
@end

@implementation CustomItemTableViewCell

- (void)updateCellWithItem:(Item *)item {
    self.item = item;
    [self updateCellView];
}
- (void)updateCellView {
    self.lblTitle.text = self.item.title;
    self.lblTitle.text = [NSString stringWithFormat:@"%ld", self.item.quantity];
}
- (IBAction)addItem:(UIButton*)button {
    self.item.quantity++;
    [self updateCellView];
}

- (IBAction)deleteItem:(UIButton*)button {
    self.item.quantity--;
    [self updateCellView];
}

@end

2。自定义单元格

@interface Item : NSObject
@property (nonatomic, strong) NSString *title;
@property (nonatomic) NSInteger quantity;
@end

@implementation Item

@end

@interface CustomItemTableViewCell : UITableViewCell

@property (nonatomic, weak) IBOutlet UILabel *lblTitle;
@property (nonatomic, weak) IBOutlet UILabel *lblCount;
@property (nonatomic, assign) Item *item;
@end

@implementation CustomItemTableViewCell

- (void)updateCellWithItem:(Item *)item {
    self.item = item;
    [self updateCellView];
}
- (void)updateCellView {
    self.lblTitle.text = self.item.title;
    self.lblTitle.text = [NSString stringWithFormat:@"%ld", self.item.quantity];
}
- (IBAction)addItem:(UIButton*)button {
    self.item.quantity++;
    [self updateCellView];
}

- (IBAction)deleteItem:(UIButton*)button {
    self.item.quantity--;
    [self updateCellView];
}

@end

3。TableViewController

@interface ItemsTableViewController : UITableViewController
@property (nonatomic, strong) NSArray *items;
@end

@implementation ItemsTableViewController

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

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

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    CustomItemTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CustomItemCell" forIndexPath:indexPath];

    [cell updateCellWithItem:self.items[indexPath.row]];

    return cell;
}

---

要更改单元格标签文本，您需要在这些选择器中提取单元格对象，您只需使用sender参数（在您的示例中为按钮）即可。有关添加功能，请参见下面的代码

-(void)addItem:(UIButton*) button
{    
  NSLog(@"UIButton%ld",(long)button.tag);
  addBtnClickCount++;  //Increase the count by 1
  MyCustomCell *cell = button.superview.superview;
  //Now change the label text for cell
  cell.lblCount.text = [NSString stringWithFormat:@"%d",addBtnClickCount];
}

---

使用减法功能的方法相同。

在自定义tableview单元格中使用更陡的控件

-(void)addItem:(UIButton*) button
{    
  NSLog(@"UIButton%ld",(long)button.tag);
  addBtnClickCount++;  //Increase the count by 1
  MyCustomCell *cell = button.superview.superview;
  //Now change the label text for cell
  cell.lblCount.text = [NSString stringWithFormat:@"%d",addBtnClickCount];
}

customcell.h类

@property (weak, nonatomic) IBOutlet UIStepper *stepper;
@property (weak, nonatomic) IBOutlet UILabel *lbl_value;

****customcell.m****

- (IBAction)stepper:(UIStepper *)sender {
    NSUInteger value = sender.value;
    lbl_value.text = [NSString stringWithFormat:@"%03d",value];
    self.txt1.text= [NSString stringWithFormat:@"%03d",value];

}

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我知道如何实现自定义表视图单元格。你能再核对一下这个问题吗。我也知道如何实现选择器。但是我需要根据单击的按钮来增加和减少标签文本，这只是问题所在。如果您有一个自定义单元格，您将添加一个

UILabel

出口，并通过

+/-

按钮来修改其文本，所有这些代码都将在

CustomTableViewCell.m

中，所以您将代码移动到CustomCell类中了？你确定你添加了出口并在.h文件中定义了代理吗？目前我已经为你的努力向你投票，谢谢你，我仍然有gt的麻烦你能检查编辑的问题吗？你真的认为可以从CellForRowAtIndexPath外部执行cell.lblCount.text我自己还没有尝试过。但是应该是这样的，因为您只是在修改单元格对象。你可以检查一下我修改过的问题吗？你为什么要在

addItem:

方法中计算第1节的indexath。我在图像或

cellForRow…

的代码中没有看到任何部分。也许这就是原因。我现在已经测试了我的逻辑，它是有效的，所以可能还有其他原因。尝试使用调试器。打印表视图中的所有单元格对象，然后打印在

addItem:

方法中得到的单元格，看看它们是否是同一个对象；您应该看到这一点。我在swift中完成了，但在目标c中没有。我知道UITableViewCell中UIButton的操作，但问题是每次用户单击buttoncell.lblTitle.text=“value changed”按钮时都要设置UILabel；这行得通吗？你所做的一切似乎都是正确的不，它行不通