Question

I am trying to pass a NSString to another view.

In my first view (is a map view) my code is:

FirstView.m file:

import “FlipsideViewController.h”

-(IBAction) displayDetails:(id) sender{

MyLocation *ann = [_mapView.selectedAnnotations objectAtIndex:([_mapView.selectedAnnotations count]-1)];

FlipsideViewController *flipsideViewController;
flipsideViewController=  [[FlipsideViewController alloc]init];
flipsideViewController.details =ann.name;
NSLog(@"ann.name:%@", ann.name);
NSLog(@"details:%@", flipsideViewController.details);

FlipsideViewController *controller = [[FlipsideViewController alloc] initWithNibName:@"details" bundle:nil];
    controller.delegate = self;     
  controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
    [self presentModalViewController:controller animated:YES];
    [controller release]; 

}

and the NSlog print the correct string. But when I try to pass that string to my SecondViewController string called details:

In my FlipsideViewController.h is defined:

NSString *details;

@property (nonatomic, strong) NSString *details;

While in the FlipsideViewController.m

@synthesize details; //and whenever I put the log, it prints the null value

value: NSLog(@”**************detalli %@”,detalli);

Where is my fault?

Answer 1

in the secondViewController add a property, a retained property of type NSString
For adding properties please read the following

http://cocoacast.com/?q=node/103

Please edit this section

FlipsideViewController *flipsideViewController;
flipsideViewController=  [[FlipsideViewController alloc]init];
flipsideViewController.details =ann.name;
NSLog(@"ann.name:%@", ann.name);
NSLog(@"details:%@", flipsideViewController.details);

FlipsideViewController *controller = [[FlipsideViewController alloc] initWithNibName:@"details" bundle:nil];
    controller.delegate = self;     
  controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
    [self presentModalViewController:controller animated:YES];
    [controller release]; 

to

FlipsideViewController *flipsideViewController;
flipsideViewController=  [[FlipsideViewController alloc]init];
flipsideViewController.details =ann.name;
NSLog(@"ann.name:%@", ann.name);
NSLog(@"details:%@", flipsideViewController.details);

flipsideViewController.delegate = self;     
flipsideViewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:flipsideViewController animated:YES];
[flipsideViewController release];