我有一个tableview来复制表单页面。它有两个部分，第0部分有8个单元，其他部分有4个单元
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [tableViewSectionData count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
switch (section)
{
case 0:
return 8;
break;
case 1:
return 4;
break;
default:
return 0;
break;
}
}
一些单元格用于显示选择器，我通过在单元格内的文本字段上添加一个按钮来完成，然后在必要时启用它。
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.section == 0)
{
TextFieldCell *cellInSection0 = [tableView dequeueReusableCellWithIdentifier:@"TextFieldCellInSection0" forIndexPath:indexPath];
if (!cellInSection0)
{
cellInSection0 = [[TextFieldCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"TextFieldCellInSection0"];
}
cellInSection0.bottomButton.hidden = YES;
cellInSection0.textFieldBottomLabel.alpha = 0.5;
cellInSection0.textFieldImageView.alpha = 0.5;
cellInSection0.textfield.delegate = self;
cellInSection0.textfield.tag = indexPath.row;
cellInSection0.pickerViewButton.hidden = YES;
NSString *placeholderString;
NSString *imageName;
switch (indexPath.row)
{
case 0:
{
if (fname)
{
cellInSection0.textfield.text = fname;
cellInSection0.textFieldBottomLabel.alpha = 1.0;
cellInSection0.textFieldImageView.alpha = 1.0;
}
else
{
placeholderString = @"FIRST NAME";
}
imageName = @"user";
}
break;
case 1:
{
if (lname)
{
cellInSection0.textfield.text = lname;
cellInSection0.textFieldBottomLabel.alpha = 1.0;
cellInSection0.textFieldImageView.alpha = 1.0;
}
else
{
placeholderString = @"LAST NAME";
}
imageName = @"user";
}
break;
case 2:
{
if (address)
{
cellInSection0.textfield.text = address;
cellInSection0.textFieldBottomLabel.alpha = 1.0;
cellInSection0.textFieldImageView.alpha = 1.0;
}
else
{
placeholderString = @"ADDRESS";
}
imageName = @"address";
}
break;
case 3:
{
cellInSection0.textfield.returnKeyType = UIReturnKeyDone;
if (floor_unit)
{
cellInSection0.textfield.text = floor_unit;
cellInSection0.textFieldBottomLabel.alpha = 1.0;
cellInSection0.textFieldImageView.alpha = 1.0;
}
else
{
placeholderString = @"FLOOR/UNIT";
}
imageName = @"address";
}
break;
case 4:
{
cellInSection0.pickerViewButton.hidden = NO;
cellInSection0.textfield.enabled = NO;
cellInSection0.pickerViewButton.tag = indexPath.row;
[cellInSection0.pickerViewButton addTarget:self action:@selector(showCountryPicker:) forControlEvents:UIControlEventTouchUpInside];
if (countryName)
{
cellInSection0.textfield.text = countryName;
cellInSection0.textFieldBottomLabel.alpha = 1.0;
cellInSection0.textFieldImageView.alpha = 1.0;
cellInSection0.textfield.alpha = 1.0;
}
else
{
cellInSection0.textfield.text = @"COUNTRY";
cellInSection0.textfield.alpha = 0.5;
}
imageName = @"mapicon";
}
break;
case 5:
{
cellInSection0.pickerViewButton.hidden = NO;
cellInSection0.textfield.enabled = NO;
cellInSection0.pickerViewButton.tag = indexPath.row;
[cellInSection0.pickerViewButton addTarget:self action:@selector(showStatePicker:) forControlEvents:UIControlEventTouchUpInside];
if (stateName)
{
cellInSection0.textfield.text = stateName;
cellInSection0.textFieldBottomLabel.alpha = 1.0;
cellInSection0.textFieldImageView.alpha = 1.0;
cellInSection0.textfield.alpha = 1.0;
}
else
{
cellInSection0.textfield.text = @"STATE";
cellInSection0.textfield.alpha = 0.5;
}
imageName = @"mapicon";
}
break;
case 6:
{
cellInSection0.pickerViewButton.hidden = NO;
cellInSection0.textfield.enabled = NO;
cellInSection0.pickerViewButton.tag = indexPath.row;
[cellInSection0.pickerViewButton addTarget:self action:@selector(showCityPicker:) forControlEvents:UIControlEventTouchUpInside];
if (cityName)
{
cellInSection0.textfield.text = cityName;
cellInSection0.textFieldBottomLabel.alpha = 1.0;
cellInSection0.textFieldImageView.alpha = 1.0;
cellInSection0.textfield.alpha = 1.0;
}
else
{
cellInSection0.textfield.text = @"CITY";
cellInSection0.textfield.alpha = 0.5;
}
imageName = @"mapicon";
}
break;
case 7:
{
placeholderString = @"ZIP";
imageName = @"mapicon";
}
break;
default:
break;
}
if (placeholderString)
{
NSAttributedString *placeHolder = [[NSAttributedString alloc] initWithString:placeholderString attributes:@{NSForegroundColorAttributeName: [UIColor lightGrayColor]}];
cellInSection0.textfield.attributedPlaceholder = placeHolder;
}
cellInSection0.textFieldImageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%@.png", imageName]];
return cellInSection0;
}
else
{
TextFieldCell *cellInSection1 = [tableView dequeueReusableCellWithIdentifier:@"TextFieldCellInSection1" forIndexPath:indexPath];
if (!cellInSection1)
{
cellInSection1 = [[TextFieldCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"TextFieldCellInSection1"];
}
cellInSection1.bottomButton.hidden = YES;
cellInSection1.textFieldBottomLabel.alpha = 0.5;
cellInSection1.textFieldImageView.alpha = 0.5;
cellInSection1.textfield.delegate = self;
cellInSection1.textfield.tag = indexPath.row;
NSString *placeholderString;
NSString *imageName;
switch (indexPath.row)
{
case 0:
{
if (cardNumber)
{
cellInSection1.textfield.text = cardNumber;
}
else
{
placeholderString = @"CARD NO.";
}
imageName = @"yearofincorporationicon";
}
break;
case 1:
{
if (month)
{
cellInSection1.textfield.text = month;
}
else
{
placeholderString = @"MONTH";
}
imageName = @"calender";
}
break;
case 2:
{
if (year)
{
cellInSection1.textfield.text = year;
}
else
{
placeholderString = @"YEAR";
}
imageName = @"calender";
}
break;
case 3:
{
if (cvv)
{
cellInSection1.textfield.text = cvv;
}
else
{
placeholderString = @"CVV";
}
imageName = @"yearofincorporationicon";
}
break;
default:
break;
}
if (placeholderString)
{
NSAttributedString *placeHolder = [[NSAttributedString alloc] initWithString:placeholderString attributes:@{NSForegroundColorAttributeName: [UIColor lightGrayColor]}];
cellInSection1.textfield.attributedPlaceholder = placeHolder;
}
cellInSection1.textFieldImageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%@.png", imageName]];
return cellInSection1;
}
}
乍一看这很好用。但是当我在文本字段中输入一些文本时（比如第0部分中的文本字段），第1部分的文本字段也显示相同的文本。这发生在每个文本字段中。有时占位符字符串也不匹配。它发生得如此随机，我无法解决问题所在。
任何帮助都很棒。 感谢
答案 0 :(得分：0)
您需要创建跟踪文本字段值的单独值。并且viewDidLoad中的初始值更改
var arrInitialValues: [Any] = ["", "", ""] // this array count should be same as datasource array count
在cellForRowAtIndexPath
中func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
cell.txtfield.text = arrInitialValues[indexPath.row] as! String
}
在委托方法中替换该值。
func textFieldDidEndEditing(_ textField: UITextField) {
let buttonPosition = textField.convertPoint(CGPoint.zero, to: tblView)
let indexPath: IndexPath? = tblView.indexPathForRow(at: buttonPosition)
arrInitialValues[indexPath?.row] = textField.text // or if you use model property then you can change that property here
}
请注意，这是您可以根据需要修改的示例代码
答案 1 :(得分：0)
这是因为细胞被重复使用。如果您没有正确设置if-else条件中的属性值，这是一个常见问题。
例如，在您的第一个switch案例if条件中，您正在更改textField属性，但不会更改其他条件。
让我们说满足第一个小区if条件。现在让我们说当重复使用该单元时，它将进入其他条件。但是由于该单元被重用，它将反映在if条件下对第一个单元所做的更改。由于else条件未更改textField属性，因此您将获得旧值。
我正在更改case 0 if-else条件。
if (fname)
{
cellInSection0.textfield.text = fname;
cellInSection0.textFieldBottomLabel.alpha = 1.0;
cellInSection0.textFieldImageView.alpha = 1.0;
placeholderString = @"ifPartPlaceHolderName";
}
else
{
cellInSection0.textfield.text = @"Else part name";
cellInSection0.textFieldBottomLabel.alpha = elsePartAlphaValue;
cellInSection0.textFieldImageView.alpha = elsePartAlphaValue;
placeholderString = @"FIRST NAME";
}
您还需要更改剩余的案例。请记住，无论您在if条件下更改了哪个单元格属性，都必须在else部分中提供替代方案。