UIWebView中显示加载UIActivityIndi​​cator但忽略附加载荷的要求（如，Ja

这是一个Q＆A后。 要通知其他许多用户，我看到谁这个问题挣扎，因为我通过StackOverflow上的数据库浏览。 这些用户都没有拿到过一个坚实的答案（其中大多数是问题年前冒充，所以我不打算撞击后）。

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许多挣扎的问题如下：

当您尝试在一个UIWebView加载页面，然后在页面可能加载其他页面通过iframe或再次加载通过JavaScript你最终得到所谓的页面加载功能的广告，如果你使用的是UIActivityIndi​​cator它会再次调用也惹恼你的用户。

造成这种情况的解决方法是存储先前MainURL并检查被加载正在尝试新的MainURL，如果匹配不是忽略负载功能。 （在我的回答实施例下面的代码）

**网页，将调用的一个例子webViewDidStartLoad方法中的额外次网页已经确实被加载到会后：www.speakeasy.net/speedtest/

Answer 1:

//Define the NSStrings "lastURL" & "currentURL" in the .h file.
//Define the int "falsepositive" in the .h file. (You could use booleans if you want)
//Define your UIWebView's delegate (either in the xib file or in your code `<UIWebViewDelegate>` in .h and `webView.delegate = self;` in .m viewDidLoad)

- (void)webViewDidFinishLoad:(UIWebView *)webView {
    lastURL = [NSString stringWithFormat:@"%@", webView.request.mainDocumentURL];
    if (falsepositive != 1) {
        NSLog(@"Loaded");
        //hide UIActivityIndicator
    } else {
        NSLog(@"Extra content junk (i.e. advertisements) that the page loaded with javascript has finished loading");
        //This method may be a good way to prevent ads from loading hehe, but we won't do that
    }
}

-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType; {
    NSURL *requestURL = [request mainDocumentURL];
    currentURL = [NSString stringWithFormat:@"%@", requestURL]; //not sure if "%@" should be used for an NSURL but it worked..., could cast `(NSString *)` if we *really* wanted to...
    return YES;
}

- (void)webViewDidStartLoad:(UIWebView *)webView {
    if ([currentURL isEqualToString:lastURL]) {
        falsepositive = 1;
        NSLog(@"The page is loading extra content with javascript or something, ignore this");
    } else {
        falsepositive = 0;
        NSLog(@"Loading");
        //show UIActiviyIndicator
    }
}

//make sure you read the //comments// at the top of this code snippet so that you properly define your .h variables O:) Thanks!



//

Answer 2:

我似乎无法得到这个工作。 我的WebView被称为“viewWeb”。 我在我的.m文件下面的代码：

 - (void)webViewDidFinishLoad:(UIWebView *)webView {
    lastURL = [[NSString alloc] initWithFormat:@"%@", viewWeb.request.mainDocumentURL];
    if (falsepositive != 1) {
        NSLog(@"Loaded");
        //hide UIActivityIndicator
    } else {
        NSLog(@"Extra content junk (i.e. advertisements) that the page loaded with javascript has finished loading");
        //This method may be a good way to prevent ads from loading hehe, but we won't do that
    }
}

-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType; {
    NSURL *requestURL =[request mainDocumentURL];
    currentURL = [[NSString alloc] initWithFormat:@"%@", requestURL];
    return YES;
}

- (void)webViewDidStartLoad:(UIWebView *)webView {
    if ([currentURL isEqualToString:lastURL]) {
        falsepositive = 1;
        NSLog(@"The page is loading extra content with javascript or something, ignore this");
    } else {
        falsepositive = 0;
        NSLog(@"Loading");
        //show UIActiviyIndicator
    }
}

我的.h中，我有：

NSString *lastURL;
NSString *currentURL;
BOOL falsepositive;

据拍击webViewDidFinishLoad内的“最后URL =”行（最后URL是无）。 我是很新的Xcode的，所以我在这方面的知识是有限的。 任何帮助将非常感激。

文章来源: UIWebView show UIActivityIndicator for loading but ignore additional load requests (e.g. javascript loaded advertisements) after page initially loads