Merge pull request #2 from thiagoperes/master

fix(delegate): Fixed a bug in which optional methods in delegate not implemented caused a crash

This commit fixes a crash that occurred when the hud image delegate method was not implemented by the delegate.
This commit also adds a podspec file and the related tag.

BCScanner.podspec

@@ -0,0 +1,13 @@
+Pod::Spec.new do |s|
+  s.name         = "BCScanner"
+  s.version      = "0.0.1"
+  s.summary      = "A barcode and qr code scanner that wraps the iOS7 scanning capabilities in a UIViewController"
+  s.homepage     = "https://github.com/michaelochs/BCScanner"
+  s.license      = { :type => 'Apache License, Version 2.0', :file => 'LICENSE' }
+  s.author       = 'Michael Ochs'
+  s.platform     = :ios, '7.0'
+  s.source       = { :git => "https://github.com/michaelochs/BCScanner.git", :commit => "ae445da822b3058fe57f8c262ef8596326f31929" }
+  s.source_files  = 'BCScanner', 'BCScanner/**/*.{h,m}'
+  s.framework  = 'AVFoundation'
+  s.requires_arc = true
+end

BCScanner/BCScannerViewController.m

@@ -209,13 +209,16 @@ - (void)viewDidLoad
 
 	self.previewView.session = self.session;
 
-	UIImage *hudImage = [self.delegate scannerHUDImage:self];
-	if (hudImage) {
-		UIImageView *hudImageView = [[UIImageView alloc] initWithImage:hudImage];
-		hudImageView.contentMode = UIViewContentModeScaleToFill;
-		[self.previewView addSubview:hudImageView];
-		_hudImageView = hudImageView;
-	}
+    if ([self.delegate respondsToSelector:@selector(scannerHUDImage:)])
+    {
+        UIImage *hudImage = [self.delegate scannerHUDImage:self];
+        if (hudImage) {
+            UIImageView *hudImageView = [[UIImageView alloc] initWithImage:hudImage];
+            hudImageView.contentMode = UIViewContentModeScaleToFill;
+            [self.previewView addSubview:hudImageView];
+            _hudImageView = hudImageView;
+        }
+    }
 
 	UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(focusAndExpose:)];
 	[self.previewView addGestureRecognizer:tapRecognizer];