使用prepareForSegue显示从MasterViewController到DetailViewController的字符串

Question

I have declared a string as a property in MasterViewController.h

    @property (nonatomic , readwrite) NSString *theString;

Here is my prepareForSegue method

     - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
      if ([[segue identifier] isEqualToString:@"showDetail"]) {

    NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
    NSString *string = [feeds[indexPath.row] objectForKey: @"link"];
   [[segue destinationViewController] setTheString:string];

  //UITextField *dest = [segue destinationViewController];
  //dest.theString = string;
}

}

DetailViewController.hi have created an outlet for the textView

    @interface APPDetailViewController : UIViewController
    @property (weak, nonatomic) IBOutlet UITextView *textView;

Now, What to code in implementation so i can display "theString" in MasterViewController to the textField in DetailViewController ?

Answer 1

DetailViewController.h

@property (nonatomic , strong) NSString *myString; //Do this

MasterViewController.m

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([[segue identifier] isEqualToString:@"showDetail"]) {

        NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
        NSString *string = [feeds[indexPath.row] objectForKey: @"link"];

        //Do this
        APPDetailViewController *myController = (APPDetailViewController*)segue.destinationViewController;
        myController.myString = string;
    }
}

Try this way.

Answer 2

1 - there should be theString property inside DetailViewController . (Optional, see step 3 below)

2 - For the above code to compile and run, you must also cast destinationViewController to DetailViewController .

Like this:

DetailViewController * destVC = (DetailViewController *) [segue destinationViewController];

3 -

destVC.theString = string;

Optionally, without theString inside DetailViewController , you could do it like:

destVC.textView.text = string;