iOS 调用 JS 无效，求大神指教！！！

这是 webview 的实现：
_webView = [[UIWebView alloc]init];
_webView.frame = CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT + 45);
_webView.scalesPageToFit = YES;
_webView.delegate = self;
_webView.userInteractionEnabled = YES;
[self.view addSubview:_webView];

NSURL *url = [[NSURL alloc]initWithString:@"http://m.weather.com.cn/mweather/101280601.shtml"];
NSURLRequest *request = [[NSURLRequest alloc]initWithURL:url];
[_webView loadRequest:request];

这是 webview 的代理方法
- (void)webViewDidFinishLoad:(UIWebView *)webView {
NSMutableString *js1 = [NSMutableString string];

// 0.删除顶部的导航条
[js1 appendString:@"var header = document.getElementsByClassName('head')[0];"];
[js1 appendString:@"header.parentNode.removeChild(header);"];

// apostertop
[js1 appendString:@"var apostertop = document.getElementsByClassName('apostertop')[0];"];
[js1 appendString:@"apostertop.parentNode.removeChild(apostertop);"];

[js1 appendString:@"var news = document.getElementsByClassName('news');"];
[js1 appendString:@"news.parentNode.removeChild(news);"];

[js1 appendString:@"var ad = document.getElementsByClassName('ad');"];
[js1 appendString:@"ad.parentNode.removeChild(ad);"];

[js1 appendString:@"var life = document.getElementsByClassName('life');"];
[js1 appendString:@"life.parentNode.removeChild(life);"];

//zs
[js1 appendString:@"var zs = document.getElementsByClassName('zs');"];
[js1 appendString:@"zs.parentNode.removeChild(zs);"];

//footer
[js1 appendString:@"var footer = document.getElementsByClassName('footer');"];
[js1 appendString:@"footer.parentNode.removeChild(footer);"];

[webView stringByEvaluatingJavaScriptFromString:js1];

}

问题来了，执行后，显示上没有任何变化，求大神指教！

11 条回复 • 2015-11-20 13:03:40 +08:00