webviewcontroller.m

GLPaint example code from the iphone SDK

/*

File: WebViewController.m
Abstract: The view controller for hosting the UIWebView feature of this sample.

Version: 1.7

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*/

#import "WebViewController.h"
#import "Constants.h"

@implementation WebViewController

- (id)init
{
	self = [super init];
	if (self)
	{
		// this title will appear in the navigation bar
		self.title = NSLocalizedString(@"WebTitle", @"");
	}
	return self;
}

- (void)dealloc
{
	[myWebView release];
	[urlField release];
	
	[super dealloc];
}

- (void)loadView
{
	// the base view for this view controller
	UIView *contentView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
	contentView.backgroundColor = [UIColor whiteColor];
	
	// important for view orientation rotation
	contentView.autoresizesSubviews = YES;
	contentView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);	
	
	self.view = contentView;
	
	[contentView release];

	CGRect webFrame = [[UIScreen mainScreen] applicationFrame];
	webFrame.origin.y += kTopMargin + 5.0;	// leave from the URL input field and its label
	webFrame.size.height -= 40.0;
	myWebView = [[UIWebView alloc] initWithFrame:webFrame];
	myWebView.backgroundColor = [UIColor whiteColor];
	myWebView.scalesPageToFit = YES;
	myWebView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
	myWebView.delegate = self;
	[self.view addSubview: myWebView];
	
	CGRect textFieldFrame = CGRectMake(kLeftMargin, kTweenMargin, self.view.bounds.size.width - (kLeftMargin * 2.0), kTextFieldHeight);
	urlField = [[UITextField alloc] initWithFrame:textFieldFrame];
    urlField.borderStyle = UITextBorderStyleBezel;
    urlField.textColor = [UIColor blackColor];
    urlField.delegate = self;
    urlField.placeholder = @"<enter a URL>";
    urlField.text = @"http://www.apple.com";
	urlField.backgroundColor = [UIColor whiteColor];
	urlField.autoresizingMask = UIViewAutoresizingFlexibleWidth;
	urlField.returnKeyType = UIReturnKeyGo;
	urlField.keyboardType = UIKeyboardTypeURL;	// this makes the keyboard more friendly for typing URLs
	urlField.autocorrectionType = UITextAutocorrectionTypeNo;	// we don't like autocompletion while typing
	urlField.clearButtonMode = UITextFieldViewModeAlways;
	[self.view addSubview:urlField];

	[myWebView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.apple.com"]]];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
	// we support rotation in this view controller
	return YES;
}

// this helps dismiss the keyboard when the "Done" button is clicked
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
	[textField resignFirstResponder];
	[myWebView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:[textField text]]]];
	
	return YES;
}


#pragma mark UIWebView delegate methods

- (void)webViewDidStartLoad:(UIWebView *)webView
{
	// starting the load, show the activity indicator in the status bar
	[UIApplication sharedApplication].isNetworkActivityIndicatorVisible = YES;
}

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
	// finished loading, hide the activity indicator in the status bar
	[UIApplication sharedApplication].isNetworkActivityIndicatorVisible = NO;
}

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
	// load error, hide the activity indicator in the status bar
	[UIApplication sharedApplication].isNetworkActivityIndicatorVisible = NO;

	// report the error inside the webview
	NSString* errorString = [NSString stringWithFormat:
							 @"<html><center><font size=+5 color='red'>An error occurred:<br>%@</font></center></html>",
							 error.localizedDescription];
	[myWebView loadHTMLString:errorString baseURL:nil];
}

@end