ios - 自定义 UITableViewCell 中的 UITextFields 文本在滚动时出现在其他单元格中

Question

我是 iOS 开发新手。我在 Xcode 6( Storyboard)中创建我的应用程序。

我的问题是文本输入文本字段，滚动 TableView 随机将文本字段文本随机播放到其他文本字段。我在这样的堆栈溢出中看到了两个问题。但那个答案并不能解决问题。

1. MoneyEntry.xib 是一个带有一个标签和一个文本框的 uitableviewcell。并向其添加类文件并连接 IBOutlet 并将标识符作为“MoneyEntryIdentifier”添加到 uitableviewcell。

   //MoneyEntryTableViewCell.h
   
   @interface MoneyEntryTableViewCell : UITableViewCell
   
   //Money Entry Cell
   @property (strong, nonatomic) IBOutlet UILabel *lblMemName;
   @property (strong, nonatomic) IBOutlet UITextField *textAmount;
   
   @end
   
   
   //MoneyEntryTableViewCell.m
   #import "MoneyEntryTableViewCell.h"
   
   @implementation MoneyEntryTableViewCell
   
   @synthesize lblMemName,textAmount;
   - (void)awakeFromNib {
   }
   
   - (void)setSelected:(BOOL)selected animated:(BOOL)animated {
   [super setSelected:selected animated:animated];
   }
   @end
   

2. 在 Main.storyboard 中添加 UITableView 并连接 IBOutlet 并添加数据源和委托(delegate)。

   //MoneyDetailViewController.h
   
   #import <UIKit/UIKit.h>
   @interface MoneyDetailViewController : UIViewController
   @property (strong, nonatomic) IBOutlet UITableView *tblVwMoneyEntry;
   @end
   
   
   //MoneyDetailViewController.m
    @interface MoneyDetailViewController ()
    {
      NSArray *tabledata;
    }
    @end
   
    @implementation MoneyDetailViewController
   
    - (void)viewDidLoad {
     [super viewDidLoad];
     tabledata = [NSArray arrayWithObjects:@"Egg Benedict", @"Mushroom Risotto",@"Full Breakfast", @"Hamburger", @"Ham and Egg Sandwich", @"Creme Brelee",@"White Chocolate Donut", @"Starbucks Coffee", @"Vegetable Curry", nil];
   }
   
   - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [tabledata count];
   }
   
   - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"MoneyEntryIdentifier";
    static NSString *CellNib = @"MoneyEntry";
    MoneyEntryTableViewCell *cell = (MoneyEntryTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
    {
     NSArray *nib = [[NSBundle mainBundle] loadNibNamed:CellNib owner:self options:nil];
     cell = (MoneyEntryTableViewCell *)[nib objectAtIndex:0];
    }
   
    UILabel     *lblname  = (UILabel *)    [cell lblMemName];
    UITextField *txtfield = (UITextField *)[cell textAmount];
    txtfield.tag = indexPath.row;
    lblname.text = [tabledata objectAtIndex:indexPath.row];
    txtfield.placeholder =@"0.00";
    cell.selectionStyle =UITableViewCellSelectionStyleNone;
    return cell;
    }
   
   @end
   

请详细解释一下。提前致谢

Answer 1

我找到了答案......只需通过标签文本将文本字段文本放入字典 setObject 中，然后再次通过标签文本检查将文本分配给相应的文本字段......这是我的代码......

//In Interface
NSMutableDictionary *amounts;
amounts =[[NSMutableDictionary alloc]init];

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

static NSString *CellIdentifier = @"MoneyEntryIdentifier";
static NSString *CellNib = @"MoneyEntry";
MoneyEntryTableViewCell *cell = (MoneyEntryTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];

if (!cell)
{
    NSArray *nib = [[NSBundle mainBundle] loadNibNamed:CellNib owner:self options:nil];
    cell = (MoneyEntryTableViewCell *)[nib objectAtIndex:0];
}

UILabel     *lblname  = (UILabel *)    [cell lblMemName];
lblname.tag =100;
UITextField *txtfield = (UITextField *)[cell textAmount];
txtfield.tag =indexPath.row;

[txtfield addTarget:self  action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
lblname.text = tabledata[indexPath.row];
txtfield.placeholder = [NSString stringWithFormat:@"%ld",(long)indexPath.row];


if ([amounts valueForKey:lblname.text] != nil) {
    txtfield.text = [amounts valueForKey:lblname.text];
} else {
    txtfield.text = @"";
}

cell.selectionStyle =UITableViewCellSelectionStyleNone;
return cell;
}

 -(void)textFieldDidChange:(UITextField *)txtField
{
UILabel *label = (UILabel *)[txtField.superview viewWithTag:100];
NSString *labelString = label.text;
NSString *textFieldString = txtField.text;
[amounts setObject:textFieldString forKey:labelString];
}

滚动表格 View 时没有错误...