iOS开篇——UI之UIWebView

             1 - (void)createWebView{
 2//创建全屏大小的webView 3     UIWebView * view = [[UIWebView alloc]initWithFrame:self.view.bounds];
 4     view.tag = 1;
 5//创建一个网址对象 6     NSURL * url = [NSURL URLWithString:@"http://www.baidu.com"];
 7//网络请求 8     NSURLRequest * request = [[NSURLRequest alloc]initWithURL:url];
 910//用网络请求数据加载webView11    [view loadRequest:request];
1213//添加一个导航栏按钮  作为网页的返回14     self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:self action:@selector(webBack)];
1516    [self.view addSubview:view];
17}
181920 - (void)webBack{
21     UIWebView * webView = [self.view viewWithTag:1];
22    [webView goBack];
23 }

            1 - (void)webViewDidStartLoad:(UIWebView *)webView{
2     NSLog(@"开始请求数据");
3}
4 - (void)webViewDidFinishLoad:(UIWebView *)webView{
5     NSLog(@"结束请求数据");
6}
7 - (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error{
8     NSLog(@"加载错误");
9 }