带文本字段的UiTableView - 键盘出现时滚动

Question

我正在tableview控制器中创建一个带有textfields的表单.在输入字段值后按下返回键时,我试图在这里实现两件事:

1)将光标移动到下一个字段2)向上滚动表格视图

我的代码正在将光标移动到下一个字段,但滚动部分不起作用.你能让我知道我在这里失踪了吗？我研究了堆栈溢出的类似问题,并且遵循他们的建议,但仍面临问题.感谢您的意见.

- (BOOL)textFieldShouldReturn:(UITextField *)textField{

    if ([textField isEqual:self.firstName]){
    //Move cursor to next field
    [self.lastName becomeFirstResponder];

    //scroll    
    id cellContainingFirstResponder = textField.superview.superview ;
    NSIndexPath *currentRowIndexPath = [self.signUpTable indexPathForCell:cellContainingFirstResponder];
    NSIndexPath *nextRowIndexPath = [NSIndexPath indexPathForRow:currentRowIndexPath.row+1 inSection:currentRowIndexPath.section];
    [self.signUpTable scrollToRowAtIndexPath:nextRowIndexPath atScrollPosition:UITableViewScrollPositionTop animated:YES];
}

if ([textField isEqual:self.lastName]){
    //Move cursor to next field
    [self.emailId becomeFirstResponder];

    //scroll
    id cellContainingFirstResponder = textField.superview.superview ;
    NSIndexPath *currentRowIndexPath = [self.signUpTable indexPathForCell:cellContainingFirstResponder];
    NSIndexPath *nextRowIndexPath = [NSIndexPath indexPathForRow:currentRowIndexPath.row+1 inSection:currentRowIndexPath.section];
    [self.signUpTable scrollToRowAtIndexPath:nextRowIndexPath atScrollPosition:UITableViewScrollPositionTop animated:YES];
}

if ([textField isEqual:self.emailId]){

    //Move cursor to next field
    [self.phoneNumber becomeFirstResponder];

    //scroll
    id cellContainingFirstResponder = textField.superview.superview ;
    NSIndexPath *currentRowIndexPath = [self.signUpTable indexPathForCell:cellContainingFirstResponder];
    NSIndexPath *nextRowIndexPath = [NSIndexPath indexPathForRow:currentRowIndexPath.row+1 inSection:currentRowIndexPath.section];
    [self.signUpTable scrollToRowAtIndexPath:nextRowIndexPath atScrollPosition:UITableViewScrollPositionTop animated:YES];
}

if ([textField isEqual:self.phoneNumber]){

    //Move cursor to next field
    [self.password becomeFirstResponder];

    //scroll
    id cellContainingFirstResponder = textField.superview.superview ;
    NSIndexPath *currentRowIndexPath = [self.signUpTable indexPathForCell:cellContainingFirstResponder];
    NSIndexPath *nextRowIndexPath = [NSIndexPath indexPathForRow:currentRowIndexPath.row+1 inSection:currentRowIndexPath.section];
    [self.signUpTable scrollToRowAtIndexPath:nextRowIndexPath atScrollPosition:UITableViewScrollPositionTop animated:YES];

}

// This is the last field hence dismiss keyboard -> This part is working
if ([textField isEqual:self.password]){
    [textField resignFirstResponder];

}

return YES ;

}

Answer 1

要根据textfield的焦点滚动tableview,请尝试以下操作:

- (void) textFieldDidBeginEditing:(UITextField *)textField {
    UITableViewCell *cell = (UITableViewCell*) [[textField superview] superview];
    [yourTableView scrollToRowAtIndexPath:[yourTableView indexPathForCell:cell] atScrollPosition:UITableViewScrollPositionMiddle animated:YES];   
}

您可以在此处使用滚动位置设置为顶部 UITableViewScrollPositionTop

您可能想知道为什么使用两个超级视图textfield.一个用于 UITableViewCellContentView,另一个用于,UITableViewCell以便您可以获取表的当前/聚焦单元格的实例.

它有效,我们在其中一个项目中使用过它