IOS Segue- detecting table cell and opening a viewController - ios

Question

i am new to ios programming. i have a static tableViewController in which i have 3 cells. i have another view controller where there is a label and description. what i am trying to do is detect the cell which user clicks and then change the label which is in my second view controller according to that but the problem is whenever i click the cell the program crashes and added the breakpoint
here is my code
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
NSString *name;
NSString *description;
if([[segue identifier] isEqualToString:#"PushAppDetailsFromCell1"] )
{
name = #"Label 1 ";
description = #"Long description of Label 1...";
}
else if([[segue identifier] isEqualToString:#"PushAppDetailsFromCell2"] )
{
name = #"Label 2";
description = #"Long description of Label 2...";
}
else if([[segue identifier] isEqualToString:#"PushAppDetailsFromCell3"] )
{
name = #"Label 3";
description = #"Long description of Label 3...";
}
else {
return;
}
AppDetailsViewController *apDetailsViewController =
segue.destinationViewController; //here i am getting the breakpoint
apDetailsViewController.appDetails =
[[AppDetails alloc] initWithName:name description:description];
}
AppDetails.m
-(id)initWithName:(NSString *)name description:(NSString *)descr{
self = [super init];
if(self){
self.name = name;
self.description = descr;
}
return self;
}
AppDetailsViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
self.nameLabel.text = self.appDetails.name;
self.descriptionLabel.text = self.appDetails.description;
}

Answer 1

Steps to figure out the problem
1) Put a break point in prepareForSegue
2) Try to see it displays correct segue id as it should be(there might be making spelling mistake).
3) see where it's crashing in
- In prepareForSegue?
- Is this calling initname()?
- has it started it viewDidLoad().
If you do this mostly you will figure out what the problem is. If you can not then let me know.

Answer 2

Bind segue from UIViewController to UIViewController rather then cell to UIViewController. Implement following code for navigation.
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
NSLog(#"%ld",aIntSelected);
NSLog(#"%#",segue.destinationViewController);
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
aIntSelected=indexPath.row;
NSLog(#"didSelectRowAtIndexPath called");
[self performSegueWithIdentifier:#"pushSecond" sender:self];
}

Answer 3

NSArray *names = #[#"Label 1", #"Label2", #"Label 3"];
NSArray *descs = #[#"Description 1", #"Description", #"Description 3"];
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"PushAppDetailsSegue"]) {
NSIndexPath *indexPath = [self.yourTableView indexPathForSelectedRow];
AppDetailsViewController *controller = segue.destinationViewController;
controller.appDetails = [[AppDetails alloc] initWithName:names[indexPath.row] description:descs[indexPath.row]];
}
}
Drag a segue from your ViewController to SecondViewController and name it "PushAppDetailsSegue".