UIWebView获得内容的高－作出自适应高的UIWebView + WebView中点击链接返回

- (void)webViewDidFinishLoad:(UIWebView *)webView
{    
NSString *height_str= [webView stringByEvaluatingJavaScriptFromString: @"document.body.offsetHeight"];
    int height = [height_str intValue];
    webView.frame = CGRectMake(0,0,320,height);
    NSLog(@"height: %@", [webView stringByEvaluatingJavaScriptFromString: @"document.body.offsetHeight"]);
}

 点击返回

//你是想点击链接实现页面的返回

[self.navigationController popViewControllerAnimated:YES];

//还是想点击上面的返回键，回到网页的上一页


-(id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
// 下一个界面的返回按钮
    UIBarButtonItem *temporaryBarButtonItem = [[UIBarButtonItem alloc] init];
    temporaryBarButtonItem.title = @"back";
    temporaryBarButtonItem.target = self;
    temporaryBarButtonItem.action = @selector(back:);
    self.navigationItem.backBarButtonItem = temporaryBarButtonItem;

}

return self;

}


-(void) back
{
    if ([webView canGoBack]) {
        [webView goBack];    
    }
   else
    {
        [self.navigationController popViewControllerAnimated:YES];

    }
} 

//补充上面的，你要想点击链接返回
- (void)webViewDidFinishLoad:(UIWebView *)webView {

        if ([webView.request.URL isEqual: @"你的链接地址"]) {
           [self.navigationController popViewControllerAnimated:YES];
        }
         
}