从表格单元格中的文本从一个View控制器获取到另一个View控制器

Question

having trouble getting a cell that is tapped and has a checkmark to send the cell text to another View Controller

here is my code for didSelectRowAtIndexPath

UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

    if (cell.accessoryType == UITableViewCellAccessoryCheckmark) {
        cell.accessoryType = UITableViewCellAccessoryNone;

    }
    else {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
    }

}

I also have this inside a IBAction when the View Controller is dismissed:

[self dismissViewControllerAnimated:YES completion:nil];

((FSPhotoProcessViewController *)self.presentingViewController).categoryResult.text = cell.textLabel.text;

When i press the button the app crashes, but if i comment out the presentingViewController line out, then its fine.

[UITabBarController categoryResult]: unrecognized selector sent to instance 

wondering how to get the tapped cell text to another view

thanks.

Answer 1

Do you need to dismiss the view controller? You could just load the other one on top of it and then dismiss the new view controller to come back to where you are.

I had a similar problem and dismissing the main view controller was the issue.

Answer 2

You need to pass texts as NSStrings(create a property in your destination view controller) and then in the viewWillAppear part of destination view controller you need to set UI parts from that NSString property. This error occurs before you destination view controller's UI parts are not implemented until segue call. Therefore you want to pass NSString to UI objects text property but you UI object is not created in the memory.

Example:

((FSPhotoProcessViewController *)self.presentingViewController).myStringProperty = cell.textLabel.text;    

Note: You can also pass numbers,arrays, dictionaries and your custom objects(not UI related).