iPhone app crashes when comparing cell.textlabel.text to a string

Question

This is a little side project I'm working on for fun.

I begin by initializing with

- (void)viewDidLoad {

[super viewDidLoad];

rootArray = [[NSMutableArray alloc] initWithObjects:@"Earth",@"Mars",@"Pluto",nil];
moonArray = [[NSMutableArray alloc] initWithObjects:@"Clavius",@"Galileo",@"Ptolamy",nil];
marsArray = [[NSMutableArray alloc] initWithObjects:@"Phobos",@"Delmos",nil];
plutoArray = [[NSMutableArray alloc] initWithObjects:@"Charon",@"Nix",@"Hydra",nil];

self.planetList = rootArray

I just make 5 arrays, initializing planetList with rootArray. From there, I wish to use these next arrays to create table views. planetList will be the main list when the app starts, and the other 3 will be the arrays called on for the next views. So, I then have this bit of code to handle this event:

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


MoonViewController *myMoonViews = [[MoonViewController alloc] initWithNibName:@"MoonViewController" bundle:nil];

UITableViewCell *targetCell = [tableView cellForRowAtIndexPath:indexPath];

if([targetCell.textLabel.text isEqualToString:@"Earth"])
{
    myMoonViews.planetList = moonArray;
    myMoonViews.title = @"First Title";
}

else if([targetCell.textLabel.text isEqualToString:@"Mars"])
{
    myMoonViews.planetList = marsArray;
    myMoonViews.title = @"Second Title";
}

else if([targetCell.textLabel.text isEqualToString:@"Pluto"])
{
    myMoonViews.planetList = plutoArray;
    myMoonViews.title = @"Third Title";
}

 // ...
 // Pass the selected object to the new view controller.
[self.navigationController pushViewController:myMoonViews animated:YES];
[myMoonViews release];
}

I have another file the next view, MoonViewController, that uses the same code from my original ViewController (which works just fine). However I don't know where I am going wrong.

Side Notes:

• planetList is a NSMutableArray
• I am not sure what to put in the viewDidLoad of my MoonViewController.m (If this is a giant issue I was not told that when I was taught this.)
• If there is more code needed to be seen I will supply.

Thank you very much for any help!

EDIT1: Sorry I definitely should have thought to put this. The error is one this line of the second code block:

if([targetCell.textLabel.text isEqualToString:@"Earth"])

EDIT2: The MoonViewController.m functions:

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return planetList.count;
}


// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}

// Configure the cell.
cell.textLabel.text = [planetList objectAtIndex: indexPath.row];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;

}

Answer 1

There is nothing obscenely wrong with the code you've posted. Therefore, your problem may be somewhere in MoonViewController. Can you post the tableView methods?

• (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
• (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

Answer 2

This won't solve your problem, but count is not a property. It works, but you should actually use [planetList count] instead.

Also, I don't think you need to actually look at the value of textLabel.text. You can simply check your array:

if([[moonArray objectAtIndex: indexPath.row] isEqualToString:@"Earth"])