How to get HTML content of a website - ios

Question

In viewDidLoad, I'm using NSURLRequest and NSURLConnection:
NSURLRequest *site_request =
[NSURLRequest requestWithURL:[NSURL URLWithString:#"http://www.google.com/"]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:10.0];
NSURLConnection *site_connection =
[[NSURLConnection alloc] initWithRequest:site_request delegate:self];
and then I use
-(void)connection:(NSURLConnection *)site_connection didReceiveData:(NSData *)data
{
site_response = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
}
and I have the whole HTML in site_response.
I want to create an invisible UIWebView which will "open" the page from the NSURLRequest in order to use JavaScript to get content like this:
NSString *myText = [my_webView stringByEvaluatingJavaScriptFromString:
#"document.documentElement......"];
In my .h I have:
UIWebView *my_webview;
#property (nonatomic, retain) UIWebView *my_webview;
and in my .m I have:
#synthesize torrents_webview;
My viewDidLoad after NSURLRequest has
[my_webview loadRequest:site_request];
and I use
-(void)webViewDidFinishLoad:(UIWebView *)webView
{
//an alertview here
}
in order to be sure it works. But nothing happens. It doesn't give an alert view.
What am I doing wrong?

Answer 1

webViewDidFinishLoad: is a method of the UIWebView delegate. You are not setting the delegate anywhere in the code you have shown.
#interface YourClass : UIViewController <UIWebViewDelegate>
...
- (void)loadView
{
self.webView.delegate = self;
}
...
- (void)dealloc
{
self.webView.delegate = nil;
}
Also if you use NSURLRequest you're going to get the page again. But there's no need to use NSURLConnection, just go straight to loading the UIWebVIew using the NSURLRequest.
Or if you must use NSURLConnection then when the file has downloaded save it to disk and use LoadHTMLString to load the contents.

Answer 2

ViewController.h
#interface TopTorrents_ViewController : UIViewController <UITableViewDelegate, UITableViewDataSource,UIWebViewDelegate>
{
UIWebView *torrents_webview;
}
#property (nonatomic, retain) UIWebView *torrents_webview;
ViewController.m
#synthesize torrents_webview;
- (void)viewDidLoad
{
torrents_webview.delegate = self;
NSURLRequest *site_request = [NSURLRequest requestWithURL:[NSURL URLWithString:#"http://www.google.gr/"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10.0];
[torrents_webview loadRequest:site_request];
[super viewDidLoad];
}
-(void)webViewDidFinishLoad:(UIWebView *)webView
{
NSString *myText = [torrents_webview stringByEvaluatingJavaScriptFromString:#"document.getElementsByTagName('body')[0]"];
UIAlertView *my_alert = [[UIAlertView alloc] initWithTitle:#"mytitle" message:myText delegate:nil cancelButtonTitle:#"my button" otherButtonTitles:nil,nil];
[my_alert show];
}
this is my updated code... thanks