//

// ViewController.m

// Test JavaScript WebView

//

// Created by Joe Zobkiw on 12/21/12.

// Copyright (c) 2012 Zobcode LLC. All rights reserved.

//

#import "ViewController.h"

@interface ViewController () <UIWebViewDelegate>

@property (atomic, strong) IBOutlet UIWebView *webView;

@end

@implementation ViewController

- (void)viewDidLoad

{

[super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

// Make ourselves the delegate

[self.webView setDelegate:self];

// Get the path to the html file, this could have easily been loaded from a server as well

NSString *htmlFile = [[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"];

if ([htmlFile length]) {

// Get the contents of the html file

NSError *error = NULL;

NSString *html = [NSString stringWithContentsOfFile:htmlFile encoding:NSUTF8StringEncoding error:&error];

if ([html length]) {

// Define the string to inject into the html file - this can be anything you like including

// JavaScript code, html, css, etc. - anything that the client can handle

NSString *stringToInject = @"Click OK then watch the NSLog output for whatever follows the abc:// URL in the html file.";

// Inject the string by replacing our placeholder. You can use anything you like as a placeholder

// here including a comment such as <!-- put stuff here -->, etc. I happen to be setting a JavaScript

// variable in this case but you could just as easily fill in the contents of a <div>, etc.

html = [html stringByReplacingOccurrencesOfString:@"%inject%" withString:stringToInject];

// Get the base URL of the file in question, in case the page loads any other assets, etc.

NSURL *baseURL = [NSURL fileURLWithPath:htmlFile];

// Load the html into the web view

[self.webView loadHTMLString:html baseURL:baseURL];

} // handle error here

} // handle error here

}

// This delegate method is used to grab any links used to "talk back" to Objective-C code from the html/JavaScript

-(BOOL) webView:(UIWebView *)inWeb shouldStartLoadWithRequest:(NSURLRequest *)inRequest navigationType:(UIWebViewNavigationType)inType

{

// In the event we see our URL scheme pass by, we deal with it, otherwise we let other URL schemes pass by

// You may choose to handle other UIWebViewNavigationType values as your app requires

if (inType == UIWebViewNavigationTypeOther || inType == UIWebViewNavigationTypeLinkClicked) {

NSURL *URL = [inRequest URL];

NSString *scheme = [URL scheme];

if ([scheme isEqualToString:@"abc"]) {

// This is the point where we are communicated with - the resourceSpecifier contains anything after the

// abc: in the URL. We can parse it as needed. In this case we simple NSLog it.

NSLog(@"%@", [URL resourceSpecifier]);

// Let the webView know we handled it

return NO;

}

}

// Let the webView handle everything else

return YES;

}

- (void)didReceiveMemoryWarning

{

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end