我创建了一个带有textField的自定义单元格，但无法检索其值
在我的tableView中，有3个这样的自定义单元格，以及其他默认单元格
当我尝试这个：
NSString *string = customCell.textField.text;
我总是得到一个空值
这是我的代码：
TextFieldCell.m
#import "TextFieldCell.h"
@implementation TextFieldCell
@synthesize label;
@synthesize textField;
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self)
{
label = [[UILabel alloc] initWithFrame:CGRectZero];
label.backgroundColor = [UIColor clearColor];
label.textAlignment = UITextAlignmentRight;
label.textColor = [UIColor blackColor];
label.font = [UIFont boldSystemFontOfSize:16.0];
label.adjustsFontSizeToFitWidth = YES;
label.baselineAdjustment = UIBaselineAdjustmentNone;
label.numberOfLines = 20;
[self.contentView addSubview:label];
textField = [[UITextField alloc] initWithFrame:CGRectZero];
textField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
textField.backgroundColor = [UIColor clearColor];
textField.font = [UIFont boldSystemFontOfSize:16.0];
textField.delegate = self;
textField.returnKeyType = UIReturnKeyDone;
[self.contentView addSubview:textField];
}
return self;
}
-(void)layoutSubviews
{
[super layoutSubviews];
CGRect r = CGRectInset(self.contentView.bounds, 8, 8);
CGRect r1 = CGRectInset(self.contentView.bounds, 8, 8);
if (label.text != nil)
{
r.size = CGSizeMake(12, 27);
label.frame = r;
r1.origin.x += self.label.frame.size.width + 6;
r1.size.width -= self.label.frame.size.width + 6;
textField.frame = r1;
}
else
{
textField.frame = r;
}
}
-(BOOL)textFieldShouldReturn:(UITextField *)aTextField
{
[textField resignFirstResponder];
return NO;
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
[super setSelected:selected animated:animated];
}
@end
表视图数据源
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.section == 0)
{
if (indexPath.row == 0)
{
return [self textFieldCellForTableView:tableView atIndexPath:indexPath];
}
else if (indexPath.row == 1)
{
return [self textFieldCellForTableView:tableView atIndexPath:indexPath];
}
else
{
return [self defaultCellForTableView:tableView atIndexPath:indexPath];
}
}
else if (indexPath.section == 1)
{
if (indexPath.row == 0)
{
return [self textFieldCellForTableView:tableView atIndexPath:indexPath];
}
else
{
return [self defaultCellForTableView:tableView atIndexPath:indexPath];
}
}
else if (indexPath.section == 2)
{
return [self defaultCellForTableView:tableView atIndexPath:indexPath];
}
else
{
return [self chooseFotoCellForTableView:tableView atIndexPath:indexPath];
}
}
-(TextFieldCell *)textFieldCellForTableView:(UITableView *)tableView atIndexPath:(NSIndexPath *)indexPath
{
static NSString *TextFieldCellIdentifier = @"TextFieldCellIdentifier";
TextFieldCell *cell = [tableView dequeueReusableCellWithIdentifier:TextFieldCellIdentifier];
if (cell == nil)
{
cell = [[[TextFieldCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:TextFieldCellIdentifier] autorelease];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
if (indexPath.section == 0)
{
if (indexPath.row == 0)
{
cell.label.text = nil;
cell.textField.placeholder = NSLocalizedString(@"Nome", @"");
}
else
{
cell.label.text = [[NSLocale currentLocale] objectForKey:NSLocaleCurrencySymbol];
cell.textField.placeholder = NSLocalizedString(@"Costo", @"");
}
}
else
{
cell.label.text = nil;
cell.textField.placeholder = NSLocalizedString(@"URL", @"");
}
return cell;
}
检索文本字段值的代码
TextFieldCell *nomeCell = (TextFieldCell *)[self tableView:self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]];
TextFieldCell *costoCell = (TextFieldCell *)[self tableView:self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:1 inSection:0]];
TextFieldCell *linkCell = (TextFieldCell *)[self tableView:self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:1]];
NSLog(@"nomeCell textField = %@", nomeCell.textField.text);
NSLog(@"costoCell textField = %@", costoCell.textField.text);
NSLog(@"linkCell textField = %@", linkCell.textField.text);
我尝试记录nomeCell、costoCell和linkCell，它们被正确分配和初始化，我在这里没有使用ARC
有人能帮我吗
非常感谢！
我假设在尝试检索值时，您实际上已经在文本字段中输入了一些文本，并且您正在检索值以更新数据模型，而不是依赖于表视图/单元格来存储数据？
不要通过调用表视图控制器的tableView:cellForRowAtIndexPath:来获取当前单元格。只有当表视图需要一个新单元格时，才应该调用它。
直接在表视图上调用cellForRowAtIndexPath:方法。取而代之的是：
TextFieldCell *nomeCell = (TextFieldCell *)[self tableView:self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]];
这样做：
TextFieldCell *nomeCell = (TextFieldCell *)[self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]];
您将文本分配给placeholder属性，并记录textField.text。
textField = [[UITextField alloc] initWithFrame:CGRectZero];
textField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
textField.backgroundColor = [UIColor clearColor];
textField.font = [UIFont boldSystemFontOfSize:16.0];
textField.delegate = self;
//added
textField.tag = 101;
textField.returnKeyType = UIReturnKeyDone;
[self.contentView addSubview:textField];
检索文本字段值的代码：
//fetch cell for which you want to get textfield then,
TextFieldCell *nomeCell = (TextFieldCell *)[cell.contentView viewWithTag:101];