Creates delegation of DCIntrospect and update the demo.

DCIntrospect/DCIntrospect.h

@@ -17,6 +17,8 @@
 
 #ifdef DEBUG
 
+@protocol DCIntrospectDelegate;
+
 @interface UIView (debug)
 
 - (NSString *)recursiveDescription;
@@ -51,6 +53,9 @@
 
 @property (nonatomic) BOOL showingHelp;
 
+// Weak would have been better but the project is iOS 4 compatible.
+@property (nonatomic, assign) id<DCIntrospectDelegate> delegate;
+
 ///////////
 // Setup //
 ///////////
@@ -153,3 +158,9 @@
 - (BOOL)shouldIgnoreView:(UIView *)view;
 
 @end
+
+@protocol DCIntrospectDelegate <NSObject>
+
+- (BOOL)introspect:(DCIntrospect *)theIntrospect shouldConsumeKeyboardInput:(NSString *)theInput;
+
+@end

DCIntrospect/DCIntrospect.m

@@ -77,6 +77,7 @@ @implementation DCIntrospect
 @synthesize currentView, originalFrame, originalAlpha;
 @synthesize currentViewHistory;
 @synthesize showingHelp;
+@synthesize delegate;
 
 #pragma mark Setup
 
@@ -431,6 +432,10 @@ - (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range r
     return NO;
   }
 
+    if ([self.delegate introspect:self shouldConsumeKeyboardInput:string]) {
+        return NO;
+    }
+
 	if ([string isEqualToString:kDCIntrospectKeysInvoke])
 	{
 		[self invokeIntrospector];

DCIntrospectDemo/DCIntrospectDemo/DCIntrospectDemoViewController.h

@@ -7,8 +7,9 @@
 //
 
 #import <UIKit/UIKit.h>
+#import "DCIntrospect.h"
 
-@interface DCIntrospectDemoViewController : UIViewController <UITextFieldDelegate, UITableViewDelegate, UITableViewDataSource>
+@interface DCIntrospectDemoViewController : UIViewController <UITextFieldDelegate, UITableViewDelegate, UITableViewDataSource, DCIntrospectDelegate>
 {
 }
 

DCIntrospectDemo/DCIntrospectDemo/DCIntrospectDemoViewController.m

@@ -16,6 +16,8 @@ @implementation DCIntrospectDemoViewController
 - (void)dealloc
 {
 	[[DCIntrospect sharedIntrospector] removeNamesForViewsInView:self.view];
+    // It is important for the delegate to be set as nil to prevent crashes.
+    [DCIntrospect sharedIntrospector].delegate = nil;
 
     [activityIndicator release];
 	[label release];
@@ -33,6 +35,8 @@ - (void)viewDidLoad
 {
 	[super viewDidLoad];
 
+    [DCIntrospect sharedIntrospector].delegate = self;
+
 	// set the activity indicator to a non-integer frame for demonstration
 	self.activityIndicator.frame = CGRectOffset(self.activityIndicator.frame, 0.5, 0.0);
 	[[DCIntrospect sharedIntrospector] setName:@"activityIndicator" forObject:self.activityIndicator accessedWithSelf:YES];
@@ -108,4 +112,17 @@ - (IBAction)sliderChanged:(id)sender
 {
 }
 
+#pragma mark - DCIntrospectDelegate methods
+
+- (BOOL)introspect:(DCIntrospect *)theIntrospect shouldConsumeKeyboardInput:(NSString *)theInput {
+    if ([theInput isEqualToString:@"z"]) {
+        if (self.label.backgroundColor == nil) {
+            self.label.backgroundColor = [UIColor greenColor];
+        } else {
+            self.label.backgroundColor = nil;
+        }
+    }
+    return NO;
+}
+
 @end