一个小的浏览器。。。。。。。。。有后退，前进，刷新，停止，转到，本地，调js
1 _webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 40, self.view.frame.size.width, self.view.frame.size.height-40)]; 2 _webView.delegate = self; 3 [self.view addSubview:_webView];
设置几个按钮，添加点击事件，设tag值0~6
后退：[_webView goBack];
前进：[_webView goForward];
刷新：[_webView reload];
停止：[_webView stopLoading];
转到：①首先判断前缀是否有http
if(![_urlField.text hasPrefix:@"http"]){
_urlField.text = [NSString stringWithFormat:@"http://%@",_urlField.text];
}
②发送请求,就会直接转到相应的网站中
NSURL *url = [NSURL URLWithString:_urlField.text];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[_webView loadRequest:request];
本地：对于本地的html，首先得找到它的路径，将其变成字符串
NSString *path = [[NSBundle mainBundle] pahtForResource:@"xml2" ofType:@"html"];
//html字符串
NSString *htmlStr = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
[_webView loadHTMLString:htmlStr baseURL:nil];
调js：oc调js,已经有封装好的方法了，可以直接用
[_webView stringByEvaluatingJavaScriptFromString:@"func()"];
每次刷新的时候，_textField中的网址没有显示，需要一个方法来让其刷新地址栏
1 (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType 2 { 3 //请求的地址,刷新地址栏 4 _urlField.text = request.URL.absoluteString; 5 //分割字符串 6 NSArray *array = [_urlField.text componentsSeparatedByString:@"://"]; 7 if([array[0] isEqualToString:@"oc"]){ 8 //获取到javaScript想调用的方法名称 9 SEL sel = NSSelectorFromString(array[1]); 10 [self performSelector:sel]; 11 } 12 return YES; 13 } 14 15 - (void)ocFunc 16 { 17 NSLog(@"OC........"); 18 }