iOS获取网页的标题，内容，节点值

我们在iOS开发中，经常遇到一些静态网页，需获取网页的标题，可以用下面方法

还有，注意webview的代理方法 - (void)webViewDidFinishLoad:(UIWebView *)webView

网页前进和回退都会调用

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- (void)viewDidLoad {

[super viewDidLoad];

NSString *strurl=@"http://imoa-t.naton.cn/OA/jiaohu.html";

UIWebView *web = [[UIWebView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

web.delegate = self;

[web loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:strurl]]];

[self.view addSubview:web];

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

}

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- (void)webViewDidFinishLoad:(UIWebView *)webView {

UIWebView *web = webView;

//获取所有的html

NSString *allHtml = @"document.documentElement.innerHTML";

//获取网页title

NSString *htmlTitle = @"document.title";

//获取网页的一个值

NSString *htmlNum = @"document.getElementById('title').innerText";

//获取到得网页内容

NSString *allHtmlInfo = [web stringByEvaluatingJavaScriptFromString:allHtml];

NSLog(@"%@",allHtmlInfo);

NSString *titleHtmlInfo = [web stringByEvaluatingJavaScriptFromString:htmlTitle];

NSLog(@"%@",titleHtmlInfo);

NSString *numHtmlInfo = [web stringByEvaluatingJavaScriptFromString:htmlNum];

NSLog(@"%@",numHtmlInfo);

}

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