Iphone 从单元格返回空值';s文本字段
我创建了一个带有文本字段的自定义单元格,但无法检索其值。Iphone 从单元格返回空值';s文本字段,iphone,uitableview,uitextfield,custom-cell,Iphone,Uitableview,Uitextfield,Custom Cell,我创建了一个带有文本字段的自定义单元格,但无法检索其值。 在我的tableView中,有3个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 textFiel
在我的tableView中,有3个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;
}
用于检索TextField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,它们已正确分配和初始化,我这里不使用ARC…有人能帮我吗?
非常感谢你 您正在将文本分配给
占位符
属性,并且正在记录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];
我假设您在尝试检索值时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:cellforrowatinexpath:
来获取当前单元格。仅当表视图需要新单元格时,才应调用此函数
直接在表视图上调用cellforrowatinexpath:
方法。与此相反:
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]];