将NSString的值发送到ViewController PopOver

Question

我希望从PopOver View Controller中的父ViewController访问NSString的值。下面是我从tableView中选择行时生成弹出窗口的代码。我需要能够访问editPersonViewController中的varToPass值。

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

    UIView *anchorr = tableView;
    UIViewController *viewControllerForPopover =
    [self.storyboard instantiateViewControllerWithIdentifier:@"editPersonViewController"];

    popover = [[UIPopoverController alloc]
               initWithContentViewController:viewControllerForPopover];
    [popover presentPopoverFromRect:anchorr.frame
                             inView:anchorr.superview
           permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];


    Person *person = [arrayOfPersons objectAtIndex:indexPath.row];


    // I Need to Send/Access This Value In editPersonViewController
    NSString *varToPass = person.personID;


}

Answer 1

在editPersonViewController.h文件中添加一个名为personID的公共属性，如此

@property (nonatomic, strong) NSString *personID;

然后，只需将editViewController的实例化重新排序为：

UIView *anchorr = tableView;
Person *person = [arrayOfPersons objectAtIndex:indexPath.row];
EditPersonViewController *viewControllerForPopover =
(EditPersonViewController *)[self.storyboard instantiateViewControllerWithIdentifier:@"editPersonViewController"];

viewControllerForPopover.personID= person.personID;

popover = [[UIPopoverController alloc]
           initWithContentViewController:viewControllerForPopover];
[popover presentPopoverFromRect:anchorr.frame
                         inView:anchorr.superview
       permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];