Showing saved images in directory to a Collection View - ios

Question

Usually when you have the images in the project file you use the code
arraycollectionimages = [[NSArray alloc]]initwithobjects
however I want to show the images that are saved in the directories. I have created multiple directories so I just want to recall image for one of them. To make this work I want to use this code however I cannot do this? I just stuck it it in as follows but did not work well.
- (void)viewDidLoad {
NSArray *arrayCollectionImages = [[NSArray alloc ]init];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *location=#"Genre1";
NSString *fPath = [documentsDirectory stringByAppendingPathComponent:location];
NSArray *directoryContent = [[NSFileManager defaultManager] directoryContentsAtPath: fPath];
for(NSString *str in directoryContent){
NSString *finalFilePath = [fPath stringByAppendingPathComponent:str];
NSData *data = [NSData dataWithContentsOfFile:finalFilePath];
if(data)
{
UIImage *image = [UIImage imageWithData:data];
[arrayCollectionImages addObject:image];
}
}

Answer 1

I think your directory search is probably taking long. Try this...
- (void)viewDidLoad {
dispatch_queue_t searchQ = dispatch_queue_create("com.awesome", 0);
dispatch_async(searchQ, ^{
NSArray *arrayCollectionImages = [[NSArray alloc ]init];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *location=#"Genre1";
NSString *fPath = [documentsDirectory stringByAppendingPathComponent:location];
NSArray *directoryContent = [[NSFileManager defaultManager] directoryContentsAtPath: fPath];
for(NSString *str in directoryContent){
NSString *finalFilePath = [fPath stringByAppendingPathComponent:str];
NSData *data = [NSData dataWithContentsOfFile:finalFilePath];
if(data)
{ dispatch_async(dispatch_get_main_queue(),^{
UIImage *image = [UIImage imageWithData:data];
});
[arrayCollectionImages addObject:image];
}
}
});
}
The code basically spawns off another thread on the search and puts the image when its ready.