Graphics Programs Reference
In-Depth Information
UIWebView
In addition to its title, an RSSItem also keeps a link that points to the web page where the
post lives. It would be neat if Nerdfeed could open up Safari and navigate to that page. It
would be even neater if Nerdfeed could render that web page without having to leave Nerd-
feed to open Safari . Good news ? it can using the class UIWebView .
Instances of UIWebView render web content. In fact, the Safari application on your device
uses a UIWebView to render its web content. In this part of the chapter, you will create a
view controller whose view is an instance of UIWebView . When one of the items is selec-
ted from the table view of RSSItem s, you will push the web view's controller onto the
navigation stack and have it load the link stored in the RSSItem .
Create a new NSObject subclass and name it WebViewController . In We-
bViewController.h , add a property (but not an instance variable) and change the su-
perclass to UIViewController :
@interface WebViewController : NSObject
@interface WebViewController : UIViewController
@property (nonatomic, readonly) UIWebView *webView;
@end
In WebViewController.m , override loadView to create an instance of UIWebView
as the view of this view controller. Also, implement the method webView to return that
view.
@implementation WebViewController
- (void)loadView
{
// Create an instance of UIWebView as large as the screen
CGRect screenFrame = [[UIScreen mainScreen] applicationFrame];
UIWebView *wv = [[UIWebView alloc] initWithFrame:screenFrame];
// Tell web view to scale web content to fit within bounds of webview
[wv setScalesPageToFit:YES];
[self setView:wv];
}
- (UIWebView *)webView
{
return (UIWebView *)[self view];
}
In ListViewController.h , add a new property to ListViewController .
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