added ability to have multiple parallel bread crumbs to get to a view…

… controller.

example/Podfile.lock

@@ -1,5 +1,5 @@
 PODS:
-  - CatalogByConvention (2.1.0)
+  - CatalogByConvention (2.1.1)
   - CatalogExamples (1.0.0)
   - CatalogUnitTests (1.0.0):
     - Resistor
@@ -22,11 +22,11 @@ EXTERNAL SOURCES:
     :path: components/Resistor
 
 SPEC CHECKSUMS:
-  CatalogByConvention: ef0913973b86b4234bcadf22aa84037c4a47cbbd
+  CatalogByConvention: c3a5319de04250a7cd4649127fcfca5fe3322a43
   CatalogExamples: cafe3e4eae3abc948d96beb626657455c1dfb327
   CatalogUnitTests: b7a746f12abb31a905654521ee926ea007ab7275
   Resistor: 36a9ae98666be3b4f34d8133fad442fa87fdbce2
 
 PODFILE CHECKSUM: bb59c09c71f8777bbe79af5ae920e3d58849ab41
 
-COCOAPODS: 1.2.0
+COCOAPODS: 1.2.1

example/catalog/Catalog.xcodeproj/project.pbxproj

@@ -170,7 +170,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n";
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
 		526A63F3210C836C577F3F5D /* [CP] Copy Pods Resources */ = {

example/catalog/UnitTests.xcodeproj/project.pbxproj

@@ -175,7 +175,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n";
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
 		E2A6B4BD8988E7DF3FD232F4 /* [CP] Copy Pods Resources */ = {

example/components/Resistor/examples/SeriesResistorExample.m → example/components/Resistor/examples/SeriesExample.m

@@ -18,15 +18,15 @@
 
 #import <UIKit/UIKit.h>
 
-@interface SeriesResistorExample : UIViewController
+@interface SeriesExample : UIViewController
 @end
 
-@implementation SeriesResistorExample
+@implementation SeriesExample
 
 - (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
   self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
   if (self) {
-    self.title = @"Series resistors";
+    self.title = @"Series";
   }
   return self;
 }
@@ -39,10 +39,10 @@ - (void)viewDidLoad {
 
 @end
 
-@implementation SeriesResistorExample (CatalogByConvention)
+@implementation SeriesExample (CatalogByConvention)
 
 + (NSArray<NSString *> *)catalogBreadcrumbs {
-  return @[ @"Resistor", @"Series" ];
+  return @[ @[ @"Resistor", @"Series"], @[ @"Film", @"Series" ], @[@"Botany", @"Series"] ];
 }
 
 @end

src/CBCNodeListViewController.m

@@ -19,6 +19,8 @@
 #import "CBCCatalogExample.h"
 #import "private/CBCRuntime.h"
 
+void CBCAddNodeFromBreadCrumbs(CBCNode *tree, NSArray<NSString *> *breadCrumbs, Class aClass);
+
 @implementation CBCNode {
   NSMutableDictionary *_map;
   NSMutableArray *_children;
@@ -177,26 +179,13 @@ - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath
 
     NSArray *breadCrumbs = CBCCatalogBreadcrumbsFromClass(aClass);
 
-    // Walk down the navigation tree one breadcrumb at a time, creating nodes along the way.
-
-    CBCNode *node = tree;
-    for (NSUInteger ix = 0; ix < [breadCrumbs count]; ++ix) {
-      NSString *title = breadCrumbs[ix];
-      BOOL isLastCrumb = ix == [breadCrumbs count] - 1;
-
-      // Don't walk the last crumb
-
-      if (node.map[title] && !isLastCrumb) {
-        node = node.map[title];
-        continue;
+    if ([[breadCrumbs firstObject] isKindOfClass:[NSString class]]) {
+      CBCAddNodeFromBreadCrumbs(tree, breadCrumbs, aClass);
+    } else if ([[breadCrumbs firstObject] isKindOfClass:[NSArray class]]) {
+      for (NSArray<NSString *> *parallelBreadCrumb in breadCrumbs) {
+        CBCAddNodeFromBreadCrumbs(tree, parallelBreadCrumb, aClass);
       }
-
-      CBCNode *child = [[CBCNode alloc] initWithTitle:title];
-      [node addChild:child];
-      node = child;
     }
-
-    node.exampleClass = aClass;
   }
 
   // Perform final post-processing on the nodes.
@@ -211,3 +200,26 @@ - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath
 
   return tree;
 }
+
+void CBCAddNodeFromBreadCrumbs(CBCNode *tree, NSArray<NSString *> *breadCrumbs, Class aClass) {
+  // Walk down the navigation tree one breadcrumb at a time, creating nodes along the way.
+
+  CBCNode *node = tree;
+  for (NSUInteger ix = 0; ix < [breadCrumbs count]; ++ix) {
+    NSString *title = breadCrumbs[ix];
+    BOOL isLastCrumb = ix == [breadCrumbs count] - 1;
+
+    // Don't walk the last crumb
+
+    if (node.map[title] && !isLastCrumb) {
+      node = node.map[title];
+      continue;
+    }
+
+    CBCNode *child = [[CBCNode alloc] initWithTitle:title];
+    [node addChild:child];
+    node = child;
+  }
+
+  node.exampleClass = aClass;
+}