[UPDATE] Documentation and example project to check whether the reader is available

Example/QRCodeReader.swift/ViewController.swift

@@ -31,14 +31,22 @@ class ViewController: UIViewController, QRCodeReaderViewControllerDelegate {
     lazy var reader = QRCodeReaderViewController(metadataObjectTypes: [AVMetadataObjectTypeQRCode])
     
     @IBAction func scanAction(sender: AnyObject) {
+      if QRCodeReader.isAvailable() && QRCodeReader.supportsMetadataObjectTypes() {
         reader.modalPresentationStyle = .FormSheet
         reader.delegate               = self
         
         reader.completionBlock = { (result: String?) in
-            println(result)
+          println(result)
         }
         
         presentViewController(reader, animated: true, completion: nil)
+      }
+      else {
+        let alert = UIAlertController(title: "Error", message: "Reader not supported by the current device", preferredStyle: .Alert)
+        alert.addAction(UIAlertAction(title: "OK", style: .Cancel, handler: nil))
+        
+        presentViewController(alert, animated: true, completion: nil)
+      }
     }
     
     // MARK: - QRCodeReader Delegate Methods

QRCodeReader.swift.podspec

@@ -1,8 +1,8 @@
 Pod::Spec.new do |s|
   s.name             = 'QRCodeReader.swift'
-  s.version          = '3.1.0'
+  s.version          = '3.1.1'
   s.license          = 'MIT'
-  s.summary          = 'Simple QRCode reader in Swift'
+  s.summary          = 'Simple QRCode and 1D bar code reader in Swift'
   s.homepage         = 'https://github.com/yannickl/QRCodeReader.swift.git'
   s.social_media_url = 'https://twitter.com/yannickloriot'
   s.authors          = { 'Yannick Loriot' => 'contact@yannickloriot.com' }

QRCodeReader/QRCodeReader.swift

@@ -164,15 +164,18 @@ public final class QRCodeReader: NSObject, AVCaptureMetadataOutputObjectsDelegat
     return true
   }
   
-  /// Checks and return whether the given metadata object types are available
-  class func areMetadataObjectTypesAvailable(metadataObjectTypes: [String]) -> Bool {
-    if !isAvailable() {
-      return false
-    }
-    
+  /// Checks and return whether the given metadata object types are supported by the current device
+  class func supportsMetadataObjectTypes(_ metadataTypes: [String]? = nil) -> Bool {
     let output = AVCaptureMetadataOutput()
     
-    for metadataObjectType in metadataObjectTypes {
+    var metadataObjectTypes = metadataTypes
+    
+    if metadataObjectTypes == nil || metadataObjectTypes?.count == 0 {
+      // Check the QRCode metadata object type by default
+      metadataObjectTypes = [AVMetadataObjectTypeQRCode]
+    }
+    
+    for metadataObjectType in metadataObjectTypes! {
       if !contains(output.availableMetadataObjectTypes, { $0 as String == metadataObjectType }) {
         return false
       }

README.md

@@ -26,7 +26,7 @@ $ touch Podfile
 $ edit Podfile
 source 'https://github.com/CocoaPods/Specs.git'
 platform :ios, '8.0'
-pod 'QRCodeReader.swift', '~> 3.1.0'
+pod 'QRCodeReader.swift', '~> 3.1.1'
 ```
 
 Install into your project:
@@ -41,7 +41,7 @@ Open your project in Xcode from the .xcworkspace file (not the usual project fil
 $ open MyProject.xcworkspace
 ```
 
-Note that you have to use CocoaPods version 0.36, the pre-released version which supports swift. If you don't already have it, you can grab it with a single command.
+*Note that you have to use CocoaPods version 0.36, the pre-released version which supports swift. If you don't already have it, you can grab it with a single command.*
 
 ``` bash
 [sudo] gem install cocoapods --pre
@@ -84,6 +84,8 @@ func readerDidCancel(reader: QRCodeReader) {
 }
 ```
 
+*Note that you should check whether the device supports the reader library by using the `QRCodeReader.isAvailable()` and the `QRCodeReader.supportsMetadataObjectTypes()` methods.*
+
 ## Contact
 
 Yannick Loriot