ios - 自定义 UITableViewCell 中的 UITextField 委托(delegate)不会在第一次加载时被调用

Question

自定义 UITableViewCell 内的文本字段委托(delegate)不会被调用。此外，单元格末尾有一个按钮，可以动态添加或删除行。

@property (strong, nonatomic) IBOutlet UITextField *textField;
@property (strong, nonatomic) IBOutlet UIButton *plusButton;

- (IBAction)plusButtonPressed:(id)sender;

我将文本字段的所有值存储在 View Controller 内的数组中。问题是，它不会在第一次加载时更新，但如果我添加或删除行，它确实可以工作。

#pragma mark - TextFieldTableViewCellDelegate

- (void)addButtonPressed {
    [self.secondaryRecipients addObject:@""];
    [self calculateOtherRecipientsTableViewHeight];
}

- (void)deleteButtonPressedAt:(NSIndexPath *)indexPath {
    [self.secondaryRecipients removeObjectAtIndex:indexPath.row];
    [self calculateOtherRecipientsTableViewHeight];
}

- (void)textFieldDidEndEditing:(UITextField *)textField at:(NSIndexPath *)indexPath {
    [self.secondaryRecipients replaceObjectAtIndex:indexPath.row withObject:textField.text];
}

- (void)textFieldDidChangeCharacter:(NSString *)string at:(NSIndexPath *)indexPath {
    [self.secondaryRecipients replaceObjectAtIndex:indexPath.row withObject:string];
}

- (void)calculateOtherRecipientsTableViewHeight {
    self.otherRecipientsTableViewHeight.constant = TABLEVIEW_CELL_DEFAULT_HEIGHT * [self.secondaryRecipients count];
    [self.otherRecipientsTableView reloadData];
    [self recalculateViewSize];
}

下面是表格 View 单元格中的委托(delegate)方法:

#pragma mark UITextFieldDelegate

- (void)textFieldDidEndEditing:(UITextField *)textField {
    if (self.delegate && [self.delegate respondsToSelector:@selector(textFieldDidEndEditing:at:)]) {
        [self.delegate textFieldDidEndEditing:textField at:self.indexPath];
    }
}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
    NSString * text = textField.text != nil ? textField.text : @"";
    if (self.delegate && [self.delegate respondsToSelector:@selector(textFieldDidChangeCharacter:at:)]) {
        [self.delegate textFieldDidChangeCharacter:text at:self.indexPath];
    }
    return YES;
}

Answer 1

我认为 UITextField 的委托(delegate)是重点。

确保它在开始时设置正确。