UIWebView 显示正在加载网页

最新推荐文章于 2024-01-16 10:17:31 发布

转载最新推荐文章于 2024-01-16 10:17:31 发布 · 3.7k 阅读

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#report #2010

本文介绍如何在iOS应用中使用UIWebView进行网页加载时显示活动指示器，并在加载完成或出现错误时隐藏指示器及展示错误信息。

- (void)webViewDidStartLoad:(UIWebView *)webView
{
    // starting the load, show the activity indicator in the status bar
    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
}
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    // finished loading, hide the activity indicator in the status bar
    [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
}
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
    // load error, hide the activity indicator in the status bar
    [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;

    // report the error inside the webview
    NSString* errorString = [NSString stringWithFormat:
                             @"<html><center><font size=+5 color='red'>An error occurred:<br>%@</font></center></html>",
                             error.localizedDescription];
    [myWebView loadHTMLString:errorString baseURL:nil];
}