# Titanium.UI.iOS.DocumentViewer

var fileName = 'example.pdf';

// For iOS 11.2, workaround the Apple issue by creating a temporary file and
// reference it. It will be removed from filesystem once the app closes.
// Read more here: http://nshipster.com/nstemporarydirectory/
if (isiOS11_2()) {
  fileName = fileInApplicationDataDirectory(fileName);
}

var docViewer = Ti.UI.iOS.createDocumentViewer({
  url: fileName
});

docViewer.show();

// Check if the current device runs iOS 11.2+
function isiOS11_2() {
  var version = Ti.Platform.version.split(".");
  return (parseInt(version[0]) >= 11 && parseInt(version[1]) >= 2);
}

// Create a temporary file with the contents of the old file
// Expects the file to be in the resources directory. If you receive the file
// from an API-call, receive pass the Ti.Blob/Ti.File/text to "write" directly.
function fileInApplicationDataDirectory(fileName) {
  var file = Ti.Filesystem.getFile(Ti.Filesystem.resourcesDirectory, fileName);

  if (!file.exists()) {
    alert('File does not exist in resources!');
    return;
  }

  var newFile = Titanium.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, fileName);
  newFile.createFile();

  if (!newFile.exists()) {
    alert('New file could not be created in application data directory!');
    return;
  }

  newFile.write(file);

  return newFile.nativePath;
}

var navButton = Ti.UI.createButton({
    title: 'Launch'
});

var win = Ti.UI.createWindow({
    rightNavButton: navButton
});

var navWin = Ti.UI.createNavigationWindow({
    window: win
});

var winButton = Ti.UI.createButton({
    title: 'Launch',
    height: 40,
    width: 200,
    top: 270
});

win.add(winButton);

// Create a document viewer to preview a PDF file ("Example.pdf")
docViewer = Ti.UI.iOS.createDocumentViewer({
    url: 'Example.pdf'
});

// Opens the options menu and when the user clicks on 'Quick Look'
// the document viewer launches with an animated transition
navButton.addEventListener('click', function() {
    docViewer.show({
        view: navButton,
        animated: true
    });
});

// The document viewer immediately launches without an animation
winButton.addEventListener('click', function(){
    docViewer.show()
});

navWin.open();