如何使用注入的JavaScript将UIWebView滚动到某一点

Question

我整天都在阅读这篇文章,根本无法解决问题.我正在尝试加载一个网页,并在完成加载后自动将其滚动到预先确定的点.我一直在阅读教程,如http://iphoneincubator.com/blog/windows-views/how-to-inject-javascript-functions-into-a-uiwebview,但仍然没有运气.

这是我的.m问题出现的地方.我很绝望请帮忙!另外,它告诉我我的webViewDidFinishLoad正在覆盖实例变量,但这应该不是我认为的问题

- (void)viewDidLoad {
    [super viewDidLoad];

    NSString *urlAddress = @"http://www.twitter.com/richrines";
    NSURL *url = [NSURL URLWithString:urlAddress];
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
    [webView loadRequest:requestObj];

    // Do any additional setup after loading the view from its nib.
}


- (void)webViewDidFinishLoad:(UIWebView *)webView {
     [webView stringByEvaluatingJavaScriptFromString:@"var script = document.createElement('script');"  
     "script.type = 'text/javascript';"  
     "script.text = \"function myFunction() { "  
     "window.scrollTo(100,100)"
     "}\";"  
     "document.getElementsByTagName('head')[0].appendChild(script);"];  

     [webView stringByEvaluatingJavaScriptFromString:@"myFunction();"];
}

Answer 1

你为什么要以如此复杂的方式做这件事？这应该就是您所需要的：

[webView stringByEvaluatingJavaScriptFromString:@"window.scrollTo(100,100)"];