gistfile1.txt

NSString *imageName =[NSString stringWithString:[(Tweet*)[tweets objectAtIndex:indexPath.row] author]];
	NSString *userImage =[NSString stringWithString:[(Tweet*)[tweets objectAtIndex:indexPath.row]  profileImage]];
	NSArray *myArray = [userImage componentsSeparatedByString: @"/"];
	NSString *fileName = (NSString*)[myArray lastObject];
	NSString *picName =[NSString stringWithFormat:@"%@:%@", imageName, fileName];
	NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
	NSString *documentsDirectory = [paths objectAtIndex:0];
	
	NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"/ProfilePictures"];
	NSString* path = [dataPath stringByAppendingPathComponent:picName];
	UIImage* image = [UIImage imageWithContentsOfFile:path];
	
	
	if (!image) {
		UIImage *phoneImage=[UIImage imageWithData:[[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:userImage]]];
		NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
		NSString *documentsDirectory = [paths objectAtIndex:0];
		
		NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"/ProfilePictures"];
		NSString* path = [dataPath stringByAppendingPathComponent:picName];
		NSData* data = UIImagePNGRepresentation(phoneImage);
		[data writeToFile:path atomically:YES];
	}                       
	else{
		[cell.imageView setImage:image];
	}