I have just jumped into Objective-C and I got stuck pretty early on. I will post code with my question but to keep it readable i'll get rid of some of the crap, let me know if you want more code posted!
I have created a new object called 'Phrase' (subclassed from NSObject), and am reading items from JSON into these 'Phrase' objects and adding them to an array. Here's the first lot of code:
Example JSON:
{
"phrases": [
{
"title": "Title of my Phrase",
"definition" : "A way to look at some words",
"location" : "Irish Proverb"
}
]
}
Script I'm reading it in with:
- (void)viewDidLoad {
[super viewDidLoad];
self.phraseDictionary = [[NSMutableArray alloc] initWithObjects:nil];
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"phrase" ofType:@"json"];
NSString *myRawJSON = [[NSString alloc] initWithContentsOfFile:filePath];
NSData *jsonData = [myRawJSON dataUsingEncoding:NSUTF32BigEndianStringEncoding];
NSDictionary *entries = [[CJSONDeserializer deserializer] deserializeAsDictionary:jsonData error:nil];
for (id key in entries) {
NSObject *phrases = [entries objectForKey:key];
for (id phrase in phrases) {
Phrase *pushArrayToPhrase = [[Phrase alloc] initWithText:[phrase objectForKey:@"title"] definition:[phrase objectForKey:@"definition"] location:[phrase objectForKey:@"location"]];
[self.phraseDictionary addObject:pushArrayToPhrase];
}
}
}
Phrase m file:
#import "Phrase.h"
@implementation Phrase
@synthesize title;
@synthesize definition;
@synthesize location;
- (id)init {
self = [super init];
if (self != nil) {
title = @"";
definition = @"";
location = @"";
}
return self;
}
- (id)initWithTitle:(NSString *)tit definition:(NSString *)def location:(NSString *)loc {
self = [super init];
if (self != nil) {
title = tit;
definition = def;
location = loc;
}
return self;
}
@end
From here I loop through the objects and add them to a list in my splitview:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"CellIdentifier";
// Dequeue or create a cell of the appropriate type.
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
cell.accessoryType = UITableViewCellAccessoryNone;
}
Phrase *cellPhrase = [self.phraseDictionary objectAtIndex:indexPath.row];
cell.textLabel.text = cellPhrase.title;
return cell;
}
But when I click an item, and ask for a phrase based on the indexPath.row of the one clicked, I can only ever access the property used in the cell.textLabel.text. Any other attempt from here on in to access a property from the Phrase object exits the simulator.
- (void)tableView:(UITableView *)aTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
Phrase *cellPhrase = [self.phraseDictionary objectAtIndex:indexPath.row];
detailViewController.detailItem = cellPhrase;
//If i attempt 'cellPhrase.definition' here, the app will close without an error
}
Hope that's easy to follow, let me know if it's not and i'll try again!