ios 如何在uiwebview上设置滚动位置
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How to set scroll position on uiwebview
提问by dejoong
I want to go to specify line on my uiwebview loaded. I tried
我想在加载的 uiwebview 上指定行。我试过
[webView stringByEvaluatingJavaScriptFromString:@"window.scrollTo(0.0, 100.0)"];
[webView stringByEvaluatingJavaScriptFromString:@"window.scrollTo(0.0, 100.0)"];
but it's not working. My webview still start with top of the page.
I just wonder its because I load the UIWebviewinside UIView.
Check my code below on my UIView:
但它不起作用。我的 webview 仍然从页面顶部开始。我只是想知道它是因为我加载了UIWebview内部UIView. 在我的下面检查我的代码UIView：
- (void)loadView {
webview = [[WebViewDetail alloc]initWithFrame:[UIScreen mainScreen].applicationFrame]; //initialize a mainView is a UIWebVIew
webview.managedObjectContext = self.managedObjectContext;
webview.kitab = self.kitab;
webview.currentPasal = self.pasal;
self.title = [NSString stringWithFormat:@"%@ %d", self.kitab, webview.currentPasal];
self.view=webview; //make the mainView as the view of this controller
}
and I put the scroll positioning script on my UIWebView:
我把滚动定位脚本放在我的UIWebView：
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
int height = [[webView stringByEvaluatingJavaScriptFromString:@"document.body.offsetHeight;"] intValue];
NSString* javascript = [NSString stringWithFormat:@"window.scrollBy(0, %d);", height];
[self stringByEvaluatingJavaScriptFromString:javascript];
}
in this case I want to put my uiwebview go to the bottom of the page when the view is loaded. But it's totally not working, why? Am I doing it wrong?
在这种情况下，我想在加载视图时将 uiwebview 放到页面底部。但它完全不起作用，为什么？我做错了吗？
回答by Dani
Try
尝试
webview.scrollView.contentOffset = CGPointMake(0, 100);
回答by OscarWyck
Make sure you set the view controller where you have your web view to be a UIWebViewDelegate, and declare this in the @interfaceof the header file (.h).
确保将 Web 视图所在的视图控制器设置为UIWebViewDelegate，并@interface在头文件 (.h) 中声明。
[yourWebView setDelegate:self];
Then, in the webViewDidFinishLoad:method, insert this code:
然后，在webViewDidFinishLoad:方法中，插入以下代码：
[yourWebView.scrollView scrollRectToVisible:CGRectMake(0, yourWebView.bounds.size.height + 100, 1, 1) animated:NO];
