Still a bit new and I am having some issues I was hoping someone could help with. I am trying to load a JSON string coming from my server into a collectionview in iOS6 I can pull in the data using a fetchedData method called from the viewDidLoad method and that part works fine. In the fetchedData method, I break out the JSON data and place it in NSDictionaries and NSArrays and can dump the correct data to the log to see it.
The problem is when I try and use any of the information elsewhere in my code such as get the amount of elements in any of hte arrays to use as a counter to fill the collectionview.
It may be that I am tired but I can't seem to get my head around this part. The declaration of many of the main variables was in the fetchedData method and I thought since the were declared there it could be the reason I could not see them elsewhere so I moved the declaration of the variables to the interface section and was hoping this would make the variables GLOBAL and the fetchedData method continues to work just fine, but nowhere else.
When I put in breaks in the cell definition area I can see in the debugger window the variables come up as empty.
I am not sure what sections of the code you may want to see so let me know and I can post them but maybe someone could give an example of how arrays and dictionary items can be accessed in multiple methods.
To avoid confusion and to expose my hodgepodge of code at this point anyway here is the .m file or at least most of it Please don't rip to hard on the coding style I have been trying anything I could think of and tore it up pretty hard myself and it was late.
#import "ICBCollectionViewController.h"
#import "ICBCollectionViewCell.h"
#import "ICBDetailViewController.h"
@interface ICBCollectionViewController () {
NSDictionary* json;
NSDictionary* title;
NSDictionary* shortDescrip;
NSDictionary* longDescrip;
NSDictionary* price;
NSDictionary* path;
NSDictionary* sKU;
NSDictionary* audiotrack;
NSDictionary* audiotracksize;
NSArray* titles;
NSArray* shortDescription;
NSArray* longDescription;
NSArray* prices;
// NSArray* paths;
NSArray* SKUs;
NSArray* audiotracks;
NSArray* audiotracksizes;
}
@end
/*
@interface NSDictionary(JSONCategories)
+(NSDictionary*)dictionaryWithContentsOfJSONURLString:(NSString*)urlAddress;
-(NSData*)toJSON;
@end
@implementation NSDictionary(JSONCategories)
+(NSDictionary*)dictionaryWithContentsOfJSONURLString:(NSString*)urlAddress
{
NSData* data = [NSData dataWithContentsOfURL: [NSURL URLWithString: urlAddress] ];
__autoreleasing NSError* error = nil;
id result = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
if (error != nil) return nil;
return result;
}
-(NSData*)toJSON
{
NSError* error = nil;
id result = [NSJSONSerialization dataWithJSONObject:self options:kNilOptions error:&error];
if (error != nil) return nil;
return result;
}
@end
*/
@implementation ICBCollectionViewController
@synthesize paths;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
dispatch_async(kBgQueue, ^{
NSData* data = [NSData dataWithContentsOfURL: imobURL];
[self performSelectorOnMainThread:@selector(fetchedData:) withObject:data waitUntilDone:YES];
});
// Do any additional setup after loading the view.
}
- (void)fetchedData:(NSData *)responseData {
NSError* error;
//parse out the json data
json = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];
titles = [json objectForKey:@"title"]; //2
shortDescription = [json objectForKey:@"shortD"];
longDescription = [json objectForKey:@"longD"];
prices = [json objectForKey:@"price"];
self.paths = [json objectForKey:@"path"];
SKUs = [json objectForKey:@"SKU"];
audiotracks = [json objectForKey:@"audiotrack"];
audiotracksizes = [json objectForKey:@"audiotracksize"];
NSLog(@"paths: %@", paths); //3
// NSLog(@"shortDescrip: %@", shortDescription);
NSInteger t=7;
// 1) Get the latest loan
title = [titles objectAtIndex:t];
shortDescrip = [shortDescription objectAtIndex:t];
longDescrip = [longDescription objectAtIndex:t];
price = [prices objectAtIndex:t];
path = [paths objectAtIndex:t];
sKU = [SKUs objectAtIndex:t];
audiotrack = [audiotracks objectAtIndex:t];
audiotracksize = [audiotracksizes objectAtIndex:t];
//NSLog(title.count text);
//NSLog(title.allValues);
// 2) Get the data
NSString* Title = [title objectForKey:@"title"];
NSString* ShortDescrip = [shortDescrip objectForKey:@"shortD"];
NSString* LongDescrip = [longDescrip objectForKey:@"longD"];
NSNumber* Price = [price objectForKey:@"price"];
NSString* Path = [path objectForKey:@"path"];
NSString* SKU = [sKU objectForKey:@"SKU"];
NSString* AudioTrack = [audiotrack objectForKey:@"audiotrack"];
NSNumber* AudioTrackSize = [audiotracksize objectForKey:@"audiotracksize"];
/*************************HERE THE DATA EXISTS*******************************/
/******** Path = "XYXYXYXYXYXY" for example ********************************/
// 3) Set the label appropriately
NSLog([NSString stringWithFormat:@"Here is some data: Title: %@ Path %@ SKU: %@ Price: %@ Track %@ Size %@",Title, Path, SKU, Price, LongDescrip, AudioTrackSize]);
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
//DetailSegue
if ([segue.identifier isEqualToString:@"DetailSegue"]) {
ICBCollectionViewCell *cell = (ICBCollectionViewCell *)sender;
NSIndexPath *indexPath = [self.collectionView indexPathForCell:cell];
ICBDetailViewController *dvc = (ICBDetailViewController *)[segue destinationViewController];
dvc.img = [UIImage imageNamed:@"MusicPlayerGraphic.png"];
}
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
NSLog(@"paths qty = %d",[paths count]);
return 20;
}
// The cell that is returned must be retrieved from a call to -dequeueReusableCellWithReuseIdentifier:forIndexPath:
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
static NSString *identifier=@"Cell";
ICBCollectionViewCell *cell = (ICBCollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
// paths = [json objectForKey:@"path"];
NSDictionary* path = [paths objectAtIndex:indexPath.row];
NSString* Path = [path objectForKey:@"path"];
// NSString* Path = [paths objectAtIndex:indexPath.row];
NSLog(@"%d",indexPath.row);
/***********************HERE IT DOES NOT**************************/
/******** Path = "" **********************************************/
NSLog(@"xxx");
NSLog(path);
NSLog(paths);
NSLog(Path);
NSLog(@"ZZZ");
Path=@"deepsleep";
NSLog(@"xxx");
NSLog(Path);
NSLog(@"ZZZ");
// paths = [json objectForKey:@"path"];
// NSString* Path = [path objectForKey:@"path"];
NSString *imagefile = [NSString stringWithFormat:@"https://imobilize.s3.amazonaws.com/glennharrold/data/%@/mid.png", Path];
NSLog(imagefile);
NSURL *url1=[NSURL URLWithString:imagefile];
dispatch_async(kBgQueue, ^{
NSData *data1 = [NSData dataWithContentsOfURL:url1];
cell.imageView.image =[[UIImage alloc]initWithData:data1];
});
return cell;
}
@end
