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UIWebView和网页的交互(OC中调执行JS)
UIWebView和网页的交互(OC中调执行JS)
- (void)viewDidLoad
{
[superviewDidLoad];
// 1.webView
UIWebView *webView = [[UIWebViewalloc]init];
webView.frame= self.view.bounds;
webView.delegate= self;
// 伸缩页面至填充整个webView
webView.scalesPageToFit= YES;
// 隐藏scrollView
webView.scrollView.hidden= YES;
[self.viewaddSubview:webView];
// 2.加载网页
NSURLRequest *request = [NSURLRequestrequestWithURL:[NSURLURLWithString:@"http://m.dianping.com/tuan/deal/5501525"]];
[webView loadRequest:request];
// 3.创建
UIActivityIndicatorView *loadingView = [[UIActivityIndicatorViewalloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
[loadingView startAnimating];
loadingView.center= CGPointMake(160,240);
[self.viewaddSubview:loadingView];
self.loadingView= loadingView;
}
//在OC中调用JS
#pragma mark - UIWebViewDelegate
- (void)webViewDidFinishLoad:(UIWebView*)webView
{
NSMutableString *js1 = [NSMutableStringstring];
// 0.删除顶部的导航条
[js1 appendString:@"var header = document.getElementsByTagName(‘header‘)[0];"];
[js1 appendString:@"header.parentNode.removeChild(header);"];
// 1.删除底部的链接
[js1 appendString:@"var footer = document.getElementsByTagName(‘footer‘)[0];"];
[js1 appendString:@"footer.parentNode.removeChild(footer);"];
[webView stringByEvaluatingJavaScriptFromString:js1];
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.25* NSEC_PER_SEC)),dispatch_get_main_queue(), ^{
NSMutableString *js2 = [NSMutableStringstring];
// 2.删除浮动的广告
[js2 appendString:@"var list = document.body.childNodes;"];
[js2 appendString:@"var len = list.length;"];
[js2 appendString:@"var banner = list[len - 1];"];
[js2 appendString:@"banner.parentNode.removeChild(banner);"];
[webView stringByEvaluatingJavaScriptFromString:js2];
// 显示scrollView
webView.scrollView.hidden= NO;
// 删除圈圈
[self.loadingViewremoveFromSuperview];
});
}
{
[superviewDidLoad];
// 1.webView
UIWebView *webView = [[UIWebViewalloc]init];
webView.frame= self.view.bounds;
webView.delegate= self;
// 伸缩页面至填充整个webView
webView.scalesPageToFit= YES;
// 隐藏scrollView
webView.scrollView.hidden= YES;
[self.viewaddSubview:webView];
// 2.加载网页
NSURLRequest *request = [NSURLRequestrequestWithURL:[NSURLURLWithString:@"http://m.dianping.com/tuan/deal/5501525"]];
[webView loadRequest:request];
// 3.创建
UIActivityIndicatorView *loadingView = [[UIActivityIndicatorViewalloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
[loadingView startAnimating];
loadingView.center= CGPointMake(160,240);
[self.viewaddSubview:loadingView];
self.loadingView= loadingView;
}
//在OC中调用JS
#pragma mark - UIWebViewDelegate
- (void)webViewDidFinishLoad:(UIWebView*)webView
{
NSMutableString *js1 = [NSMutableStringstring];
// 0.删除顶部的导航条
[js1 appendString:@"var header = document.getElementsByTagName(‘header‘)[0];"];
[js1 appendString:@"header.parentNode.removeChild(header);"];
// 1.删除底部的链接
[js1 appendString:@"var footer = document.getElementsByTagName(‘footer‘)[0];"];
[js1 appendString:@"footer.parentNode.removeChild(footer);"];
[webView stringByEvaluatingJavaScriptFromString:js1];
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.25* NSEC_PER_SEC)),dispatch_get_main_queue(), ^{
NSMutableString *js2 = [NSMutableStringstring];
// 2.删除浮动的广告
[js2 appendString:@"var list = document.body.childNodes;"];
[js2 appendString:@"var len = list.length;"];
[js2 appendString:@"var banner = list[len - 1];"];
[js2 appendString:@"banner.parentNode.removeChild(banner);"];
[webView stringByEvaluatingJavaScriptFromString:js2];
// 显示scrollView
webView.scrollView.hidden= NO;
// 删除圈圈
[self.loadingViewremoveFromSuperview];
});
}
注意:
从网络上获取数据,如果不想看到某种效果,并且网页存放在服务器端,里面的JS和Html代码,没有办法修改,可以在UIWebView的代理方法执行JS代码,去掉不想看到的效果。
UIWebView和网页的交互(OC中调执行JS)
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