Code Samples - Mobile Application for Inventory Checkins (iOS / Objective C)

PhotosViewController.h

//
//  PhotosViewController.h
//  EMSCheck
//
//  Created by Joe Brislin on 5/5/14.
//  Copyright (c) 2014 BlueRidge Interactive. All rights reserved.
//

#import <UIKit/UIKit.h>

#import <FUIButton.h>
#import "MasterViewController.h"
#import "ThemeButtonWithIcon.h"
#import <WSAssetPickerController/WSAssetPicker.h>
#import <SOAPEngine64/SOAPEngine.h>

@interface PhotosViewController : MasterViewController <UIImagePickerControllerDelegate,WSAssetPickerControllerDelegate>
{
    UIImagePickerController *takePicker;
}

@property (strong, nonatomic) IBOutlet UIScrollView *scrollView;
@property (strong, nonatomic) IBOutlet UIPageControl *pageControl;
@property (strong, nonatomic) IBOutlet ThemeButtonWithIcon *takePhotoBtn;
@property (strong, nonatomic) IBOutlet ThemeButtonWithIcon *chooseExistingBtn;
@property (strong, nonatomic) FUIButton *submitBtn;
@property (strong, nonatomic) ALAssetsLibrary *assetsLibrary;
@property (strong, nonatomic) UIActivityIndicatorView *activityView;
@property (nonatomic, readwrite) BOOL pageControlInUse;
@property (nonatomic, readwrite) NSUInteger photoIndex;
@property (nonatomic, readwrite) NSInteger imageLimit;

- (IBAction)pickPhotos:(id)sender;
- (IBAction)takePhoto:(id)sender;
- (UIImagePickerController *)takePhotoWithCamera;
- (IBAction)changePage:(id)sender;
- (void)submitForm;
- (UIImage*)resizeImage:(UIImage *)img;
- (void)notifyInternetConnectivity;

@end

PhotosViewController.m

//
//  PhotosViewController.m
//  EMSCheck
//
//  Created by Joe Brislin on 5/5/14.
//  Copyright (c) 2014 BlueRidge Interactive. All rights reserved.
//

#import "PhotosViewController.h"
#import "AppDelegate.h"
#import "DataService.h"

#import <FontAwesome.h>
#import <TSMessages/TSMessage.h>
#import <UIColor+FlatUI.h>
#import "UIImage+Resize.h"

@interface PhotosViewController ()

@end

@implementation PhotosViewController {
    AppDelegate *appDelegate;
    CGFloat btnHeight;
}

@synthesize photoIndex, imageLimit;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)awakeFromNib
{
    [self.tabBarItem setImage:[FontAwesome imageWithIcon:fa_camera iconColor:[UIColor whiteColor] iconSize:30.0f]];
    self.tabBarItem.title = @"Photos";
    self.view.autoresizingMask = UIViewAutoresizingFlexibleHeight;
    [self.view setFrame:CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y, self.view.frame.size.width, self.view.frame.size.height - self.tabBarController.tabBar.frame.size.height)];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.imageLimit = 8;
    
    takePicker = [[UIImagePickerController alloc] init];
    takePicker.delegate = self;
    
    self.takePhotoBtn = [self.takePhotoBtn initWithFrame:self.takePhotoBtn.frame];
    [self.takePhotoBtn setFontSize:20.0f :YES];
    [self.takePhotoBtn setIcon:fa_camera :30.0f];
    
    self.chooseExistingBtn = [self.chooseExistingBtn initWithFrame:self.chooseExistingBtn.frame];
    [self.chooseExistingBtn setFontSize:20.0f :YES];
    [self.chooseExistingBtn setIcon:fa_picture_o :30.0f];
    
    btnHeight = 46.0f;
    self.submitBtn = [[FUIButton alloc] initWithFrame: CGRectMake(0, self.view.frame.size.height - self.navigationController.navigationBar.frame.size.height - self.tabBarController.tabBar.frame.size.height - (btnHeight*1.55), self.view.frame.size.width, btnHeight)];
    self.submitBtn.buttonColor = [UIColor nephritisColor];
    self.submitBtn.shadowColor = [UIColor clearColor];
    self.submitBtn.shadowHeight = 0.0f;
    self.submitBtn.cornerRadius = 0.0f;
    
    UIFont *textFont = [UIFont fontWithName:@"HelveticaNeue" size:14.0];
    
    self.submitBtn.titleLabel.font = textFont;
    [self.submitBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [self.submitBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateHighlighted];
    [self.submitBtn setTitle:@"SUBMIT" forState:UIControlStateNormal];
    [self.submitBtn setTitle:@"SUBMIT" forState:UIControlStateHighlighted];
    
    self.submitBtn.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;
    [self.submitBtn addTarget:self action:@selector(submitForm) forControlEvents:UIControlEventTouchUpInside];
    
    [self.view addSubview:self.submitBtn];
}

-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    
    appDelegate = (AppDelegate*)[[UIApplication sharedApplication] delegate];
    
    [self setupScrollView]; // re-render images layout in scrollview
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(notifyInternetConnectivity) name:@"notifyInternetConnectivity" object:nil];
    
    [[NSNotificationCenter defaultCenter] postNotificationName:@"notifyInternetConnectivity" object:self];
}

-(void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    
    if ( [appDelegate.emsObject.emsType isEqualToString:@"INVENTORY CHECK"] || appDelegate.statusForm.selectableInd ) {
        [self.submitBtn setHidden:NO];
    }else{
        [self.submitBtn setHidden:YES];
    }
    
}

- (void)viewWillLayoutSubviews
{
    [super viewWillLayoutSubviews];
    
    CGPoint scrollViewCenter = CGPointMake(self.scrollView.frame.size.width/2, self.scrollView.frame.size.height/2);
    CGPoint activityCenter = [self.view convertPoint:scrollViewCenter fromView:self.scrollView];
    
    self.activityView.center = activityCenter;
    
    [self.submitBtn setFrame:CGRectMake(0, self.view.frame.size.height - self.navigationController.navigationBar.frame.size.height - self.tabBarController.tabBar.frame.size.height, self.view.frame.size.width, btnHeight)];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

- (UIActivityIndicatorView *)activityView
{
    if (_activityView == nil) {
        
        _activityView =
        [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
        [_activityView setColor:[UIColor darkGrayColor]];
        [self.view addSubview:_activityView];
    }
    return _activityView;
}

- (void)setScrollView:(UIScrollView *)scrollView
{
    scrollView.layer.cornerRadius = 4.f;
    scrollView.layer.borderWidth = 1.f;
    scrollView.layer.borderColor = [UIColor colorWithWhite:0.5 alpha:0.5].CGColor;
    _scrollView = scrollView;
}

- (void)setPageControl:(UIPageControl *)pageControl
{
    pageControl.numberOfPages = 0;
    _pageControl = pageControl;
}

- (IBAction)pickPhotos:(id)sender {
    ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
    self.assetsLibrary = library;
    
    WSAssetPickerController *picker = [[WSAssetPickerController alloc] initWithAssetsLibrary:library];
    picker.delegate = self;
    picker.selectionLimit = (self.photoIndex >= imageLimit) ? 0 : imageLimit - self.photoIndex;
    
    [self presentViewController:picker animated:YES completion:NULL];
}

- (IBAction)takePhoto:(id)sender {
    takePicker = [self takePhotoWithCamera];
    takePicker.view.tag = 91;
    [self presentViewController:takePicker animated:YES completion:nil];
}

- (UIImagePickerController *)takePhotoWithCamera
{
    [takePicker setSourceType:UIImagePickerControllerSourceTypeCamera];
    [takePicker setEditing:NO];
    return takePicker;
}

- (IBAction)changePage:(id)sender {
    self.pageControlInUse = YES;
    
    CGRect pageFrame = self.scrollView.bounds;
    pageFrame.origin.x = pageFrame.size.width * self.pageControl.currentPage;
    [self.scrollView scrollRectToVisible:pageFrame animated:YES];
}

- (void)setupScrollView
{
    // ScrollView setup.
    NSLog(@"[PhotosViewController] Setting up scroll view...");
    NSLog(@"[PhotosViewController] AppDelegate Photos (%lu) - %@",(unsigned long)[appDelegate.photos count], appDelegate.photos);
    
    self.photoIndex = [appDelegate.photos count];
    
    if (!self.photoIndex) {
        [self.scrollView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
    }
    [self checkPhotoLimit];
    
    CGFloat padding = 10.0;
    CGRect imageViewFrame = CGRectInset(self.scrollView.bounds, padding, padding);
    imageViewFrame.origin.x = self.scrollView.frame.size.width * self.photoIndex + padding;
    
    CGSize contentSize = CGSizeZero;
    contentSize.width = self.scrollView.frame.size.width * self.photoIndex;
    contentSize.height = self.scrollView.frame.size.height-(padding*2);
    self.scrollView.contentSize = contentSize;
    
    // PageControl setup.
    self.pageControl.hidden = NO;
    self.pageControl.numberOfPages = self.photoIndex;
    
    for (UIImage *image in appDelegate.photos) {
        
        UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
        imageView.frame = imageViewFrame;
        imageView.contentMode = UIViewContentModeScaleAspectFit;
        
        [self.scrollView addSubview:imageView];
    }
    
    [self.activityView stopAnimating];
    
    [self.scrollView flashScrollIndicators];
}

- (void)submitForm
{
    [self processEMSCheck:appDelegate.statusForm.tagNumber photos:appDelegate.photos dismissView:YES];
}

- (UIImage*)resizeImage:(UIImage *)img
{
    CGFloat i_width = 1000.0f;
    if (img.size.width > i_width) {
        float scale = i_width / img.size.width;
        CGFloat i_height = img.size.height * scale;
        
        CGSize newSize = CGSizeMake(i_width, i_height);
        
        return [img resizedImage:newSize interpolationQuality:kCGInterpolationHigh];
    }else{
        return img;
    }
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    
    // Show some activity.
    [self.activityView startAnimating];
    
    CGFloat padding = 10.0;
    CGRect imageViewFrame = CGRectInset(self.scrollView.bounds, padding, padding);
    imageViewFrame.origin.x = self.scrollView.frame.size.width * self.photoIndex + padding;
    
    UIImage *image = [self resizeImage:[info objectForKey:UIImagePickerControllerOriginalImage]];
    [appDelegate.photos addObject:image];
    UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
    imageView.frame = imageViewFrame;
    imageView.contentMode = UIViewContentModeScaleAspectFit;
    
    self.photoIndex++;
    
    [self.scrollView addSubview:imageView];
    [self dismissViewControllerAnimated:YES completion:nil];
    
    // ScrollView setup.
    CGSize contentSize = CGSizeZero;
    contentSize.width = self.scrollView.frame.size.width * self.photoIndex;
    contentSize.height = self.scrollView.frame.size.height-(padding*2);
    self.scrollView.contentSize = contentSize;
    
    // PageControl setup.
    self.pageControl.hidden = NO;
    self.pageControl.numberOfPages = self.photoIndex;
    
    [self.activityView stopAnimating];
    
    [self.scrollView flashScrollIndicators];
    
    [self checkPhotoLimit];
}

- (void)checkPhotoLimit {
    if (self.photoIndex >= 8) {
        self.takePhotoBtn.enabled = NO;
        self.takePhotoBtn.alpha = 0.5;
        self.chooseExistingBtn.enabled = NO;
        self.chooseExistingBtn.alpha = 0.5;
    }else{
        self.takePhotoBtn.enabled = YES;
        self.takePhotoBtn.alpha = 1.0;
        self.chooseExistingBtn.enabled = YES;
        self.chooseExistingBtn.alpha = 1.0;
    }
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

#pragma mark - WSAssetPickerControllerDelegate Methods

- (void)assetPickerControllerDidCancel:(WSAssetPickerController *)sender
{
    [self dismissViewControllerAnimated:YES completion:NULL];
}

- (void)assetPickerController:(WSAssetPickerController *)sender didFinishPickingMediaWithAssets:(NSArray *)assets
{
    // Reset the scroll view and page control.
    // [self.scrollView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
    // self.scrollView.contentSize = CGSizeZero;
    // self.pageControl.numberOfPages = 0;
    self.pageControl.currentPage = 0;
    // self.pageControl.hidden = YES;
    
    // Show some activity.
    [self.activityView startAnimating];
    
    // Dismiss the picker controller.
    [self dismissViewControllerAnimated:YES completion:^{
        
        if (assets.count == 0) {
            [self.activityView stopAnimating];
            [self dismissViewControllerAnimated:YES completion:nil];
            return;
        }
        
        CGFloat padding = 10.0;
        
        // ScrollView setup.
        
        self.photoIndex = [appDelegate.photos count];
        
        CGFloat assetsCount = self.photoIndex + assets.count;
        CGSize contentSize = CGSizeZero;
        contentSize.width = self.scrollView.frame.size.width * assetsCount;
        contentSize.height = self.scrollView.frame.size.height-(padding*2);
        self.scrollView.contentSize = contentSize;
        
        // PageControl setup.
        self.pageControl.hidden = NO;
        self.pageControl.numberOfPages = assetsCount;
        
        for (ALAsset *asset in assets) {
            
            CGRect imageViewFrame = CGRectInset(self.scrollView.bounds, padding, padding);
            imageViewFrame.origin.x = self.scrollView.frame.size.width * self.photoIndex + padding;
            
            UIImage *image = [self resizeImage:[[UIImage alloc] initWithCGImage:asset.defaultRepresentation.fullScreenImage]];
            [appDelegate.photos addObject:image];
            UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
            imageView.frame = imageViewFrame;
            imageView.contentMode = UIViewContentModeScaleAspectFit;
            
            self.photoIndex++;
            
            [self.scrollView addSubview:imageView];
        }
        
        [self.activityView stopAnimating];
        
        [self.scrollView flashScrollIndicators];
        
        [self checkPhotoLimit];
    }];
}

#pragma mark - UIScrollViewDelegate Methods

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    // Update the pageControl > 50% of the previous/next page is visible.
    CGFloat pageWidth = self.scrollView.frame.size.width;
    int page = floor((self.scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
    self.pageControl.currentPage = page;
}

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
    self.pageControlInUse = NO;
}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    self.pageControlInUse = NO;
}

- (void)notifyInternetConnectivity
{
    if ([[AppDelegate sharedDelegate] isReachable]) {
        self.submitBtn.enabled = YES;
        self.submitBtn.alpha = 1.0;
    }else{
        self.submitBtn.enabled = NO;
        self.submitBtn.alpha = 0.5;
    }
}

@end