使用UITableViewCell和UITextField滚动问题

我的UITableViewCells有点问题。我有我的tableView中有不同数量的行的5个部分。我为每行添加了一个包含UITextfield的子视图。我遇到的问题是，当我滚动时，我的细胞子视图正在改变。我拍了一段视频，所以你可以看看我的意思。使用UITableViewCell和UITextField滚动问题

http://files.beger.org/Scolling_Issue18072012.swf

对不起，这是所有在德国:)

这里是代码：

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

static NSString *CellIdentifier = @"Cell"; 

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
if (cell == nil) { 
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier]; 

// Add a UITextFiel 
    if ([indexPath section] == 0) { 
     UITextField *textFieldName = [[UITextField alloc] initWithFrame:CGRectMake(120, 10, 185, 30)]; 
     textFieldName.adjustsFontSizeToFitWidth = YES; 
     textFieldName.textColor = [UIColor blackColor]; 
     if ([indexPath row] == 0) { 
      textFieldName.placeholder = @"Max"; 
      textFieldName.keyboardType = UIKeyboardTypeDefault; 
      textFieldName.returnKeyType = UIReturnKeyDone; 
     } 
     else { 
      textFieldName.placeholder = @"Mustermann"; 
      textFieldName.keyboardType = UIKeyboardTypeDefault; 
      textFieldName.returnKeyType = UIReturnKeyDone; 
     }  
     textFieldName.backgroundColor = [UIColor clearColor]; 
     textFieldName.autocorrectionType = UITextAutocorrectionTypeNo; // no auto correction support 
     textFieldName.autocapitalizationType = UITextAutocapitalizationTypeWords; // no auto capitalization support 
     textFieldName.textAlignment = UITextAlignmentLeft; 
     textFieldName.tag = 0; 
     //playerTextField.delegate = self; 

     textFieldName.clearButtonMode = UITextFieldViewModeNever; // no clear 'x' button to the right 
     [textFieldName setEnabled: YES]; 

     [cell addSubview:textFieldName]; 

     [textFieldName release]; 
    } 
    else if ([indexPath section] == 1) { 
     UITextField *textFieldContactData = [[UITextField alloc] initWithFrame:CGRectMake(120, 10, 185, 30)]; 
     textFieldContactData.adjustsFontSizeToFitWidth = YES; 
     textFieldContactData.textColor = [UIColor blackColor]; 
     if ([indexPath row] == 0) { 
      textFieldContactData.placeholder = @"04132 21123 321"; 
      textFieldContactData.keyboardType = UIKeyboardTypePhonePad; 
     } 
     else if ([indexPath row] == 1) { 
      textFieldContactData.placeholder = @"04132 21123 300"; 
      textFieldContactData.keyboardType = UIKeyboardTypePhonePad; 
     } 
     else if ([indexPath row] == 2) { 
      textFieldContactData.placeholder = @"0150 12543 101"; 
      textFieldContactData.keyboardType = UIKeyboardTypePhonePad; 
     } 
     else if ([indexPath row] == 3) { 
      textFieldContactData.placeholder = @"[email protected]"; 
      textFieldContactData.keyboardType = UIKeyboardTypeEmailAddress; 
      textFieldContactData.returnKeyType = UIReturnKeyDone; 
     } 
     else if ([indexPath row] == 4) { 
      textFieldContactData.placeholder = @"www.musterfirma.de"; 
      textFieldContactData.keyboardType = UIKeyboardTypeURL; 
      textFieldContactData.returnKeyType = UIReturnKeyDone; 
     } 
     else { 
      textFieldContactData.placeholder = @"Deutsch"; 
      textFieldContactData.keyboardType = UIKeyboardTypeDefault; 
      textFieldContactData.returnKeyType = UIReturnKeyDone; 
     } 
     textFieldContactData.backgroundColor = [UIColor clearColor]; 
     textFieldContactData.autocorrectionType = UITextAutocorrectionTypeNo; // no auto correction support 
     textFieldContactData.autocapitalizationType = UITextAutocapitalizationTypeNone; // no auto capitalization support 
     textFieldContactData.textAlignment = UITextAlignmentLeft; 
     textFieldContactData.tag = 0; 
     //playerTextField.delegate = self; 

     textFieldContactData.clearButtonMode = UITextFieldViewModeNever; // no clear 'x' button to the right 
     [textFieldContactData setEnabled: YES]; 

     [cell addSubview:textFieldContactData]; 

     [textFieldContactData release]; 
    } 
    // Adresse 
    else if ([indexPath section] == 2) { 
     UITextField *textFieldAddress = [[UITextField alloc] initWithFrame:CGRectMake(120, 10, 185, 30)]; 
     textFieldAddress.adjustsFontSizeToFitWidth = YES; 
     textFieldAddress.textColor = [UIColor blackColor]; 
     if ([indexPath row] == 0) { 
      textFieldAddress.placeholder = @"Musterstr. 10"; 
      textFieldAddress.keyboardType = UIKeyboardTypeDefault; 
      textFieldAddress.autocapitalizationType = UITextAutocapitalizationTypeWords; 
     } 
     else if ([indexPath row] == 1) { 
      textFieldAddress.placeholder = @"50000"; 
      textFieldAddress.keyboardType = UIKeyboardTypeDefault; 
     } 
     else if ([indexPath row] == 2) { 
      textFieldAddress.placeholder = @"Musterstadt"; 
      textFieldAddress.keyboardType = UIKeyboardTypeDefault; 
      textFieldAddress.autocapitalizationType = UITextAutocapitalizationTypeWords; 
     } 
     else { 
      textFieldAddress.placeholder = @"Deutschland"; 
      textFieldAddress.keyboardType = UIKeyboardTypeDefault; 
      textFieldAddress.autocapitalizationType = UITextAutocapitalizationTypeWords; 
     } 
     textFieldAddress.backgroundColor = [UIColor clearColor]; 
     textFieldAddress.autocorrectionType = UITextAutocorrectionTypeNo; // no auto correction support 
     textFieldAddress.autocapitalizationType = UITextAutocapitalizationTypeNone; // no auto capitalization support 
     textFieldAddress.textAlignment = UITextAlignmentLeft; 
     textFieldAddress.tag = 0; 
     //playerTextField.delegate = self; 

     textFieldAddress.clearButtonMode = UITextFieldViewModeNever; // no clear 'x' button to the right 
     [textFieldAddress setEnabled: YES]; 

     [cell addSubview:textFieldAddress]; 

     [textFieldAddress release]; 
    } 
    // Abteilung und Funktion 
    else if ([indexPath section] == 3) { 
     UITextField *textFieldFunction = [[UITextField alloc] initWithFrame:CGRectMake(120, 10, 185, 30)]; 
     textFieldFunction.adjustsFontSizeToFitWidth = YES; 
     textFieldFunction.textColor = [UIColor blackColor]; 
     if ([indexPath row] == 0) { 
      textFieldFunction.placeholder = @"Einkauf"; 
      textFieldFunction.keyboardType = UIKeyboardTypeDefault; 
      textFieldFunction.autocapitalizationType = UITextAutocapitalizationTypeWords; 
     } 
     else { 
      textFieldFunction.placeholder = @"Einkaufsleiter"; 
      textFieldFunction.keyboardType = UIKeyboardTypeDefault; 
      textFieldFunction.autocapitalizationType = UITextAutocapitalizationTypeWords; 
     } 
     textFieldFunction.backgroundColor = [UIColor clearColor]; 
     textFieldFunction.autocorrectionType = UITextAutocorrectionTypeNo; // no auto correction support 
     textFieldFunction.autocapitalizationType = UITextAutocapitalizationTypeNone; // no auto capitalization support 
     textFieldFunction.textAlignment = UITextAlignmentLeft; 
     textFieldFunction.tag = 0; 
     //playerTextField.delegate = self; 

     textFieldFunction.clearButtonMode = UITextFieldViewModeNever; // no clear 'x' button to the right 
     [textFieldFunction setEnabled: YES]; 

     [cell addSubview:textFieldFunction]; 

     [textFieldFunction release]; 
    } 
    // Kundenbeziehung 
    else if ([indexPath section] == 4) { 
     UITextField *textFieldCustomer= [[UITextField alloc] initWithFrame:CGRectMake(120, 10, 185, 30)]; 
     textFieldCustomer.adjustsFontSizeToFitWidth = YES; 
     textFieldCustomer.textColor = [UIColor blackColor]; 
     textFieldCustomer.placeholder = @"Musterfirma AG"; 
     textFieldCustomer.keyboardType = UIKeyboardTypeDefault; 
     textFieldCustomer.backgroundColor = [UIColor clearColor]; 
     textFieldCustomer.autocorrectionType = UITextAutocorrectionTypeNo; // no auto correction support 
     textFieldCustomer.autocapitalizationType = UITextAutocapitalizationTypeNone; // no auto capitalization support 
     textFieldCustomer.textAlignment = UITextAlignmentLeft; 
     textFieldCustomer.tag = 0; 

     textFieldCustomer.clearButtonMode = UITextFieldViewModeNever; // no clear 'x' button to the right 
     [textFieldCustomer setEnabled: YES]; 

     [cell addSubview:textFieldCustomer]; 

     [textFieldCustomer release]; 
    } 
    // Lieferantenbeziehung 
    else { 
     UITextField *textFieldSupplier= [[UITextField alloc] initWithFrame:CGRectMake(120, 10, 185, 30)]; 
     textFieldSupplier.adjustsFontSizeToFitWidth = YES; 
     textFieldSupplier.textColor = [UIColor blackColor]; 
     textFieldSupplier.placeholder = @"Lieferanten AG"; 
     textFieldSupplier.keyboardType = UIKeyboardTypeDefault; 
     textFieldSupplier.backgroundColor = [UIColor clearColor]; 
     textFieldSupplier.autocorrectionType = UITextAutocorrectionTypeNo; // no auto correction support 
     textFieldSupplier.autocapitalizationType = UITextAutocapitalizationTypeNone; // no auto capitalization support 
     textFieldSupplier.textAlignment = UITextAlignmentLeft; 
     textFieldSupplier.tag = 0; 

     textFieldSupplier.clearButtonMode = UITextFieldViewModeNever; // no clear 'x' button to the right 
     [textFieldSupplier setEnabled: YES]; 

     [cell addSubview:textFieldSupplier]; 

     [textFieldSupplier release]; 
    } 
} 
if ([indexPath section] == 0) { 
    if ([indexPath row] == 0) { 
     // Vorname 
     cell.textLabel.text = @"Vorname"; 
    } 
    else { 
     // Nachname 
     cell.textLabel.text = @"Nachname"; 
    } 
} 
// Kontaktdaten 
else if ([indexPath section] == 1) { 
    if ([indexPath row] == 0) { 
     cell.textLabel.text = @"Telefon"; 
    } 
    else if ([indexPath row] == 1) { 
     cell.textLabel.text = @"Fax"; 
    } 
    else if ([indexPath row] == 2) { 
     cell.textLabel.text = @"Mobil"; 
    } 
    else if ([indexPath row] == 3) { 
     cell.textLabel.text = @"E-Mail"; 
    } 
    else if ([indexPath row] == 4) { 
     cell.textLabel.text = @"WWW"; 
    } 
    else { 
     cell.textLabel.text = @"Sprache"; 
    } 
} 
// Adresse 
else if ([indexPath section] == 2) { 
    if ([indexPath row] == 0) { 
     cell.textLabel.text = @"Straße"; 
    } 
    else if ([indexPath row] == 1) { 
     cell.textLabel.text = @"PLZ"; 
    } 
    else if ([indexPath row] == 2) { 
     cell.textLabel.text = @"Ort"; 
    } 
    else { 
     cell.textLabel.text = @"Land"; 
    } 
} 
// Section Abteilung und Funktion 
else if ([indexPath section] == 3) { 
    if ([indexPath row] == 0) { 
     cell.textLabel.text = @"Abteilung"; 
    } 
    else { 
     cell.textLabel.text = @"Funktion"; 
    } 
} 
// Section Kundenbeziehung 
else if ([indexPath section] == 4) { 
     cell.textLabel.text = @"Kunde"; 
} 
// Section Lieferantenbeziehung 
else { 
    cell.textLabel.text = @"Lieferant"; 
} 
return cell;

}

我认为细胞不能储存我的数据/子视图当我重用他们。有什么办法可以解决这个问题吗？

谢谢！ Christoph

来源

2012-07-18 Christoph Beger

你能发表一些代码吗？特别是cellForRowAtIndexPath方法 – 2012-07-18 08:15:50

是肯定的！我不知道为什么我没有这样做:) – 2012-07-18 09:01:33

dequeueReusableCellWithIdentifier返回可重用的单元格，如果有的话。这意味着如果某个单元格不可见，则iOS不会再创建一个UITableViewCell。它会直接返回使用过的单元格。它使性能更好，内存利用率更低。

因此，当您确定单元格为零时，您应该创建一个单元格和文本字段。将textfiled添加为单元格的子视图。

单元之外是零，你应该提供textfiled的其他属性。你为cell.textLable.text做了同样的事情。您还需要为textfiled进行相同的练习。要获取textField，请在添加时进行标记。使用该标签，您可以返回textField。

static NSString *CellIdentifier = @"Cell"; 

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
if (cell == nil) { 
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier]; 

// Add a UITextFiel 
    if ([indexPath section] == 0) { 
     UITextField *textFieldName = [[UITextField alloc] initWithFrame:CGRectMake(120, 10, 185, 30)]; 
     textFieldName.adjustsFontSizeToFitWidth = YES; 
     textFieldName.textColor = [UIColor blackColor]; 
     textFieldName.tag = 25; 
     if ([indexPath row] == 0) { 
      textFieldName.placeholder = @"Max"; 
      textFieldName.keyboardType = UIKeyboardTypeDefault; 
      textFieldName.returnKeyType = UIReturnKeyDone; 
textFieldName.backgroundColor = [UIColor clearColor]; 
     textFieldName.autocorrectionType = UITextAutocorrectionTypeNo; // no auto correction support 
     textFieldName.autocapitalizationType = UITextAutocapitalizationTypeWords; // no auto capitalization support 
     textFieldName.textAlignment = UITextAlignmentLeft; 
[cell addSubview:textFieldName]; 

     [textFieldName release]; 
     } 
    } 
} 

//Here fetch the textFiled.. 
UITextFiled *tField = [cell viewWithTag:25]; 
//Identify row, section and do other operations like setting text, place holder etc...

来源

2012-07-18 09:22:59 Apurv

谢谢你的答案！我会马上试试这个！有道理:) – 2012-07-18 09:40:00

这工作得很好！非常感谢你！ – 2012-07-18 10:29:24

很高兴工作。请享用：） – Apurv 2012-07-18 10:33:05

如果单元格是新创建的单元格，则只添加一个UITextView，因此如果单元格被重新使用，那么UITextview也会被重新使用。为了解决这个问题，你既可以：

把你所有的UITextView的创建代码出如果（细胞==零）语句

或

当您设置cell.textlabel.text找到一种方法访问已添加到单元格中的文本视图（使用标签属性或循环浏览子视图）并对其进行更改。

希望这会有所帮助。

来源

2012-07-18 09:19:23 JDx

使用UITableViewCell和UITextField滚动问题

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