From 7f88abcef3c65c209afcfc2e1c3e52af4bd769c7 Mon Sep 17 00:00:00 2001
From: Mike Seaby <mike@pixelspring.co.uk>
Date: Wed, 15 Jun 2011 19:17:51 +0100
Subject: [PATCH] Navigation Bar Left Button now calls back to js & can be now
 be removed

---
 Classes/leftButton.h |  8 ++++++--
 Classes/leftButton.m | 46 +++++++++++++++++++++-----------------------
 Classes/screenShot.h | 16 +++++++++++++++
 Classes/screenShot.m | 14 ++++++++++++++
 4 files changed, 58 insertions(+), 26 deletions(-)
 create mode 100644 Classes/screenShot.h
 create mode 100644 Classes/screenShot.m

diff --git a/Classes/leftButton.h b/Classes/leftButton.h
index 80c6d7c..ac0a705 100644
--- a/Classes/leftButton.h
+++ b/Classes/leftButton.h
@@ -6,11 +6,15 @@
 //  Copyright 2011 Mike Seaby. All rights reserved.
 //
 
-#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
 
 
 @interface leftButton : NSObject {
-
+    UIWebView *webView;
+    NSString *currentPage;
 }
 
+@property (nonatomic, assign) UIWebView *webView;
+@property (retain) NSString *currentPage;
+
 @end
diff --git a/Classes/leftButton.m b/Classes/leftButton.m
index 2cc0940..9167ca4 100644
--- a/Classes/leftButton.m
+++ b/Classes/leftButton.m
@@ -7,25 +7,19 @@
 //
 
 #import "leftButton.h"
-
-UIBarButtonItem *button;
-UINavigationController *controller;
-UIAlertView *alert;
+#import "NKBridge.h"
 
 @implementation leftButton
 
+@synthesize webView, currentPage;
+
 - (void)addLeftButton {
-	controller = [[NSClassFromString(@"NKBridge") sharedInstance]
-	navigationControllerForPage:@"main.html"];
-    
-	button = [[UIBarButtonItem alloc]
-    initWithTitle:@"Button"
-	style:UIBarButtonItemStylePlain 
-    
-    target:self action:@selector(buttonClicked:)];
-    
-    //button =  UIBarButtonSystemItemDone;
+	UINavigationController *controller = [[NKBridge sharedInstance] navigationControllerForPage:self.currentPage];
+	
+    UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithTitle:@"Button" style:UIBarButtonItemStylePlain target:self action:@selector(buttonClicked:)];
     
+	//    UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"imagename.png"] style:UIBarButtonItemStylePlain target:self action:@selector(buttonClicked:)]; // in case you want image there
+	
 	controller.visibleViewController.navigationItem.leftBarButtonItem = button;
     
     // ********************************************************************************************************
@@ -62,18 +56,22 @@ - (void)addLeftButton {
 	
 }
 
-// Called when left button pressed
+- (void)removeLeftButton {
+    UINavigationController *controller = [[NKBridge sharedInstance] navigationControllerForPage:self.currentPage];
+	controller.visibleViewController.navigationItem.leftBarButtonItem = nil;
+}
+
+- (void)setNKWebView:(UIWebView*)view {
+    self.webView = view;
+}
+
+- (void)setNKCurrentPage:(NSString*)page {
+    self.currentPage = page;
+}
+
 - (void) buttonClicked:(id)sender{
-	button = (UIBarButtonItem *)sender;
 	
-    alert = [[UIAlertView alloc] initWithTitle:@"Left Bar Button!" message:@"You Pressed It!"
-                                                   delegate:self cancelButtonTitle:@"OK!" otherButtonTitles:nil];
-    [alert show];
-    [alert release];
-    
-    // ********************************************************************************************************
-    // TODO: Add method to return button press to javascript
-    // ********************************************************************************************************
+    [self.webView performSelectorOnMainThread:@selector(stringByEvaluatingJavaScriptFromString:) withObject:[NSString stringWithFormat:@"leftButtonClicked()"] waitUntilDone:NO];
 }
 
 @end
diff --git a/Classes/screenShot.h b/Classes/screenShot.h
new file mode 100644
index 0000000..d9bdf86
--- /dev/null
+++ b/Classes/screenShot.h
@@ -0,0 +1,16 @@
+//
+//  screenShot.h
+//  ObjC-Mix
+//
+//  Created by Mike Seaby on 30/05/2011.
+//  Copyright 2011 Mike Seaby. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+
+@interface screenShot : NSObject {
+    
+}
+
+@end
diff --git a/Classes/screenShot.m b/Classes/screenShot.m
new file mode 100644
index 0000000..dda2c5f
--- /dev/null
+++ b/Classes/screenShot.m
@@ -0,0 +1,14 @@
+//
+//  screenShot.m
+//  ObjC-Mix
+//
+//  Created by Mike Seaby on 30/05/2011.
+//  Copyright 2011 Mike Seaby. All rights reserved.
+//
+
+#import "screenShot.h"
+
+
+@implementation screenShot
+
+@end