Three20 TTPhotoViewController is not displaying photos - ios

Question

I have gone through a few tutorials including the sample app included
with Three20 and cannot figure out why photos aren't showing up in my
TTPhotoViewController. I actually find it pretty hard to debug.
Below is the code I have. Any thoughts on why images will not load
and how to debug it would be great. I get a completely black view in
between my bottom tabbar and upper nav bar. I also see left and right
arrows overlayed on the black view which seems to be for navigating
photos although I thought it was supposed to display a thumbnail
gallery.
// A TTPhoto class
// Photo.h
#import <Foundation/Foundation.h>
#import <Three20/Three20.h>
#interface Photo : NSObject <TTPhoto> {
NSString *_caption;
NSString *_urlLarge;
NSString *_urlSmall;
NSString *_urlThumb;
id <TTPhotoSource> _photoSource;
CGSize _size;
NSInteger _index;
}
#property (nonatomic, copy) NSString *caption;
#property (nonatomic, copy) NSString *urlLarge;
#property (nonatomic, copy) NSString *urlSmall;
#property (nonatomic, copy) NSString *urlThumb;
#property (nonatomic, assign) id <TTPhotoSource> photoSource;
#property (nonatomic) CGSize size;
#property (nonatomic) NSInteger index;
- (id)initWithCaption:(NSString *)caption urlLarge:(NSString
*)urlLarge urlSmall:(NSString *)urlSmall urlThumb:(NSString *)urlThumb
size:(CGSize)size;
#end
// Photo.m
#import "Photo.h"
#implementation Photo
#synthesize caption = _caption;
#synthesize urlLarge = _urlLarge;
#synthesize urlSmall = _urlSmall;
#synthesize urlThumb = _urlThumb;
#synthesize photoSource = _photoSource;
#synthesize size = _size;
#synthesize index = _index;
- (id)initWithCaption:(NSString *)caption urlLarge:(NSString
*)urlLarge urlSmall:(NSString *)urlSmall urlThumb:(NSString *)urlThumb
size:(CGSize)size {
if ((self = [super init])) {
self.caption = caption;
self.urlLarge = urlLarge;
self.urlSmall = urlSmall;
self.urlThumb = urlThumb;
self.size = size;
self.index = NSIntegerMax;
self.photoSource = nil;
}
return self;
}
- (void) dealloc {
self.caption = nil;
self.urlLarge = nil;
self.urlSmall = nil;
self.urlThumb = nil;
[super dealloc];
}
#pragma mark TTPhoto
- (NSString*)URLForVersion:(TTPhotoVersion)version {
switch (version) {
case TTPhotoVersionLarge:
return _urlLarge;
case TTPhotoVersionMedium:
return _urlLarge;
case TTPhotoVersionSmall:
return _urlSmall;
case TTPhotoVersionThumbnail:
return _urlThumb;
default:
return nil;
}
}
#end
// A TTPhotoSource class
// PhotoSet.h
#import <Foundation/Foundation.h>
#import "Three20/Three20.h"
#interface PhotoSet : TTURLRequestModel <TTPhotoSource> {
NSString *_title;
NSArray *_photos;
NSArray* _tempPhotos;
NSTimer* _fakeLoadTimer;
}
#property (nonatomic, copy) NSString *title;
#property (nonatomic, retain) NSArray *photos;
- (id) init;
#end
// PhotoSet.m
#import "PhotoSet.h"
#import "Photo.h"
#implementation PhotoSet
#synthesize title = _title;
#synthesize photos = _photos;
- (id) init {
_title = #"Test photo album";
_photos = [[NSArray alloc] initWithObjects:
[[[Photo alloc] initWithCaption:#"coming soon"
urlLarge:#"http://farm5.static.flickr.com/
4066/4653156849_0905e6b58e_o.jpg"
urlSmall:#"http://farm5.static.flickr.com/
4066/4653156849_0d15f0e3f0_s.jpg"
urlThumb:#"http://farm5.static.flickr.com/
4066/4653156849_0d15f0e3f0_s.jpg"
size:CGSizeMake(220, 112)] autorelease],
[[[Photo alloc] initWithCaption:#"coming soon 2"
urlLarge:#"http://farm5.static.flickr.com/
4023/4653774402_05e6acd995_o.jpg"
urlSmall:#"http://farm5.static.flickr.com/
4009/4653157237_c2f5f59e0d_s.jpg"
urlThumb:#"http://farm5.static.flickr.com/
4009/4653157237_c2f5f59e0d_s.jpg"
size:CGSizeMake(220, 112)] autorelease],
[[[Photo alloc] initWithCaption:#"coming soon 2"
urlLarge:#"http://farm5.static.flickr.com/
4023/4653774402_05e6acd995_o.jpg"
urlSmall:#"http://farm5.static.flickr.com/
4009/4653157237_c2f5f59e0d_s.jpg"
urlThumb:#"http://farm5.static.flickr.com/
4009/4653157237_c2f5f59e0d_s.jpg"
size:CGSizeMake(220, 112)] autorelease],
[[[Photo alloc] initWithCaption:#"coming soon 2"
urlLarge:#"http://farm5.static.flickr.com/
4023/4653774402_05e6acd995_o.jpg"
urlSmall:#"http://farm5.static.flickr.com/
4009/4653157237_c2f5f59e0d_s.jpg"
urlThumb:#"http://farm5.static.flickr.com/
4009/4653157237_c2f5f59e0d_s.jpg"
size:CGSizeMake(220, 112)] autorelease],
nil];
for (int i = 0; i < _photos.count; ++i) {
id<TTPhoto> photo = [_photos objectAtIndex:i];
if ((NSNull*)photo != [NSNull null]) {
NSLog(#"in here 65434");
photo.photoSource = self;
photo.index = i;
}
}
return self;
}
- (void) dealloc {
self.title = nil;
self.photos = nil;
[super dealloc];
}
#pragma mark TTModel
- (BOOL)isLoading {
return NO;
}
- (BOOL)isLoaded {
return YES;
}
#pragma mark TTPhotoSource
- (NSInteger)numberOfPhotos {
return _photos.count;
}
- (NSInteger)maxPhotoIndex {
return _photos.count-1;
}
- (id<TTPhoto>)photoAtIndex:(NSInteger)photoIndex {
if (photoIndex < _photos.count) {
return [_photos objectAtIndex:photoIndex];
} else {
return nil;
}
}
#end
// A TTPhotoViewController
// EventDetailViewController.h
#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#import <Three20/Three20.h>
#import "PhotoSet.h"
#class Event;
#interface EventDetailViewController :
TTPhotoViewController<UINavigationControllerDelegate,
UIImagePickerControllerDelegate> {
NSArray *photos;
Event *event;
PhotoSet *_photoSet;
}
#property (nonatomic, retain) NSArray *photos;
#property (nonatomic, retain) Event *event;
#property (nonatomic, retain) PhotoSet *photoSet;
- (id)initWithEvent:(Event *)e;
// EventDetailViewController.m
#import "EventDetailViewController.h"
#import "Event.h"
#import "PhotoSet.h"
#import "Photo.h"
#implementation EventDetailViewController
#synthesize photos;
#synthesize event;
#synthesize photoSet = _photoSet;
#pragma mark -
#pragma mark Initialization
- (void)viewDidLoad {
self.photoSet = [[PhotoSet alloc] init];
self.photoSource = self.photoSet;
}
- (id)initWithEvent:(Event *)e {
if (self) {
self.event = e;
}
return self;
}
#end

Answer 1

You may find an answer here: http://www.raywenderlich.com/1430/how-to-use-the-three20-photo-viewer