PrivacyScreenPlugin.m

/**
 * PrivacyScreenPlugin.m
 * Created by Tommy-Carlos Williams on 18/07/2014
 * Copyright (c) 2014 Tommy-Carlos Williams. All rights reserved.
 * MIT Licensed
 */
#import "PrivacyScreenPlugin.h"

static UIImageView *imageView;

@implementation PrivacyScreenPlugin

- (void)pluginInitialize
{
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onAppDidBecomeActive:)
                                               name:UIApplicationDidBecomeActiveNotification object:nil];

  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onAppWillResignActive:)
                                               name:UIApplicationWillResignActiveNotification object:nil];
}

- (void)onAppDidBecomeActive:(UIApplication *)application
{
  if (imageView == NULL) {
    self.viewController.view.window.hidden = NO;
  } else {
    [imageView removeFromSuperview];
  }
}

- (void)onAppWillResignActive:(UIApplication *)application
{
  CDVViewController *vc = (CDVViewController*)self.viewController;
  NSString *imgName = [self getImageName:self.viewController.interfaceOrientation delegate:(id<CDVScreenOrientationDelegate>)vc device:[self getCurrentDevice]];
  UIImage *splash = [UIImage imageNamed:imgName];
  if (splash == NULL) {
    imageView = NULL;
    self.viewController.view.window.hidden = YES;
  } else {
    imageView = [[UIImageView alloc]initWithFrame:[self.viewController.view bounds]];
    [imageView setImage:splash];
    
    if ([self isUsingCDVLaunchScreen]) {
        // launch screen expects the image to be scaled using AspectFill.
        imageView.contentMode = UIViewContentModeScaleAspectFill;
    }
    
    #ifdef __CORDOVA_4_0_0
        [[UIApplication sharedApplication].keyWindow addSubview:imageView];
    #else
        [self.viewController.view addSubview:imageView];
    #endif
  }
}

// Code below borrowed from the CDV splashscreen plugin @ https://github.com/apache/cordova-plugin-splashscreen
// Made some adjustments though, becuase landscape splashscreens are not available for iphone < 6 plus
- (CDV_iOSDevice) getCurrentDevice
{
  CDV_iOSDevice device;
  
  UIScreen* mainScreen = [UIScreen mainScreen];
  CGFloat mainScreenHeight = mainScreen.bounds.size.height;
  CGFloat mainScreenWidth = mainScreen.bounds.size.width;
  
  int limit = MAX(mainScreenHeight,mainScreenWidth);
  
  device.iPad = (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad);
  device.iPhone = (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone);
  device.retina = ([mainScreen scale] == 2.0);
  device.iPhone4 = (device.iPhone && limit == 480.0);
  device.iPhone5 = (device.iPhone && limit == 568.0);
  // note these below is not a true device detect, for example if you are on an
  // iPhone 6/6+ but the app is scaled it will prob set iPhone5 as true, but
  // this is appropriate for detecting the runtime screen environment
  device.iPhone6 = (device.iPhone && limit == 667.0);
  device.iPhone6Plus = (device.iPhone && limit == 736.0);
  
  return device;
}

- (BOOL) isUsingCDVLaunchScreen {
    NSString* launchStoryboardName = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"UILaunchStoryboardName"];
    if (launchStoryboardName) {
        return ([launchStoryboardName isEqualToString:@"CDVLaunchScreen"]);
    } else {
        return NO;
    }
}


- (NSString*)getImageName:(UIInterfaceOrientation)currentOrientation delegate:(id<CDVScreenOrientationDelegate>)orientationDelegate device:(CDV_iOSDevice)device
{
  // Use UILaunchImageFile if specified in plist.  Otherwise, use Default.
  NSString* imageName = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"UILaunchImageFile"];
  
  NSUInteger supportedOrientations = [orientationDelegate supportedInterfaceOrientations];
  
  // detect if we are using CB-9762 Launch Storyboard; if so, return the associated image instead
  if ([self isUsingCDVLaunchScreen]) {
      imageName = @"LaunchStoryboard";
      return imageName;
  }


  // Checks to see if the developer has locked the orientation to use only one of Portrait or Landscape
  BOOL supportsLandscape = (supportedOrientations & UIInterfaceOrientationMaskLandscape);
  BOOL supportsPortrait = (supportedOrientations & UIInterfaceOrientationMaskPortrait || supportedOrientations & UIInterfaceOrientationMaskPortraitUpsideDown);
  // this means there are no mixed orientations in there
  BOOL isOrientationLocked = !(supportsPortrait && supportsLandscape);
  
  if (imageName) {
    imageName = [imageName stringByDeletingPathExtension];
  } else {
    imageName = @"Default";
  }

  // Add Asset Catalog specific prefixes
  if ([imageName isEqualToString:@"LaunchImage"])
  {
    if(device.iPhone4 || device.iPhone5 || device.iPad) {
      imageName = [imageName stringByAppendingString:@"-700"];
    } else if(device.iPhone6) {
      imageName = [imageName stringByAppendingString:@"-800"];
    } else if(device.iPhone6Plus) {
      imageName = [imageName stringByAppendingString:@"-800"];
      if (currentOrientation == UIInterfaceOrientationPortrait || currentOrientation == UIInterfaceOrientationPortraitUpsideDown) {
        imageName = [imageName stringByAppendingString:@"-Portrait"];
      }
    }
  }
  
  BOOL isLandscape = supportsLandscape &&
  (currentOrientation == UIInterfaceOrientationLandscapeLeft || currentOrientation == UIInterfaceOrientationLandscapeRight);
  
  if (device.iPhone5) { // does not support landscape
    imageName = isLandscape ? nil : [imageName stringByAppendingString:@"-568h"];
  } else if (device.iPhone6) { // does not support landscape
    imageName = isLandscape ? nil : [imageName stringByAppendingString:@"-667h"];
  } else if (device.iPhone6Plus) { // supports landscape
    if (isOrientationLocked) {
      imageName = [imageName stringByAppendingString:(supportsLandscape ? @"-Landscape" : @"")];
    } else {
      switch (currentOrientation) {
        case UIInterfaceOrientationLandscapeLeft:
        case UIInterfaceOrientationLandscapeRight:
          imageName = [imageName stringByAppendingString:@"-Landscape"];
          break;
        default:
          break;
      }
    }
    imageName = [imageName stringByAppendingString:@"-736h"];
    
  } else if (device.iPad) { // supports landscape
    if (isOrientationLocked) {
      imageName = [imageName stringByAppendingString:(supportsLandscape ? @"-Landscape" : @"-Portrait")];
    } else {
      switch (currentOrientation) {
        case UIInterfaceOrientationLandscapeLeft:
        case UIInterfaceOrientationLandscapeRight:
          imageName = [imageName stringByAppendingString:@"-Landscape"];
          break;
          
        case UIInterfaceOrientationPortrait:
        case UIInterfaceOrientationPortraitUpsideDown:
        default:
          imageName = [imageName stringByAppendingString:@"-Portrait"];
          break;
      }
    }
  }
  
  return imageName;
}

@end