DOM Ready 上的 iOS UIWebView

发布于 2025-01-02 12:28:26 字数 102 浏览 0 评论 0原文

我的问题是 UIWebView 在渲染其内容之前触发 webViewDidFinishLoad，因此在显示视图后，在显示视图内容之前会出现短暂的延迟。当 DOM 完全渲染时是否可以触发事件？

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开始看清了 2025-01-09 12:28:26

是的，为此使用 JavaScript。在 HTML 页面中添加一个 window.onload JavaScript 处理程序，然后当它触发时，您可以执行以下两件事之一：

通过加载虚假 URL 并使用 webview 委托拦截该 URL 来调用应用程序。例如

//在您的网页中，在 javascript 中

window.onload = function() { document.location.href = 'http://madeupdomain.com/loaded'};

//可可中的webview委托

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)请求导航类型:(UIWebViewNavigationType)navigationType
{
    NSURL *URL = [请求网址];
    NSString *host = URL.host;
    if ([主机 isEqualToString:@"madeupdomain.com"])
    {
        //webview已经加载完毕，所以显示它
        webview.hidden = NO;

        返回否；
    }
    返回是；
}

在 JavaScript 代码中设置一个变量标志，然后让应用程序使用计时器在 Web 视图上调用 stringByEvaluatingJavascriptFromString 来轮询 Web 视图，以查看该标志是否已设置。

//在您的网页中，在 javascript 中

window.pageHasLoaded = false;
window.onload = function() { window.pageHasLoaded = true; };

//在您的本机应用程序代码中的计时器中

if ([[webview stringByEvaluatingJavascriptFromString:@"window.pageHasLoaded"] isEqualToString:@"true"])
{
     webview.hidden = NO;
}

Yes, use JavaScript for this. In your HTML page add a window.onload JavaScript handler, then when it fires you can do one of two things:

call out to the application by loading a fake URL and intercepting this with the webview delegate. E.g.

//in your web page, in javascript

window.onload = function() { document.location.href = 'http://madeupdomain.com/loaded'};

//webview delegate in cocoa

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    NSURL *URL = [request URL];
    NSString *host = URL.host;
    if ([host isEqualToString:@"madeupdomain.com"])
    {
        //the webview has finished loading, so show it
        webview.hidden = NO;

        return NO;
    }
    return YES;
}

set a variable flag in your javascript code, then have the application poll the webview with a timer calling stringByEvaluatingJavascriptFromString on the webview to see if that flag has been set yet.

//in your web page, in javascript

window.pageHasLoaded = false;
window.onload = function() { window.pageHasLoaded = true; };

//in a timer in your native app code

if ([[webview stringByEvaluatingJavascriptFromString:@"window.pageHasLoaded"] isEqualToString:@"true"])
{
     webview.hidden = NO;
}

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南冥有猫 2025-01-09 12:28:26

试试这个

@interface LoadNewsPageController : UIViewController <UIWebViewDelegate>
@property(nonatomic, weak) IBOutlet UIWebView *webView;
@end



@implementation LoadNewsPageController {

}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    self.webView.delegate = self;

    NSLog(@"%@", self.newsObject.url);
    NSURL *websiteUrl = [NSURL URLWithString:@"http://google.com"];
    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:websiteUrl];
    [self.webView loadRequest:urlRequest];
}


- (void)webViewDidFinishLoad:(UIWebView *)webView {
    if ([[webView stringByEvaluatingJavaScriptFromString:@"document.readyState"] isEqualToString:@"complete"]) {
        // UIWebView object has fully loaded.
        NSLog(@"Dom ready");

    }
}


@end

try this

@interface LoadNewsPageController : UIViewController <UIWebViewDelegate>
@property(nonatomic, weak) IBOutlet UIWebView *webView;
@end



@implementation LoadNewsPageController {

}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    self.webView.delegate = self;

    NSLog(@"%@", self.newsObject.url);
    NSURL *websiteUrl = [NSURL URLWithString:@"http://google.com"];
    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:websiteUrl];
    [self.webView loadRequest:urlRequest];
}


- (void)webViewDidFinishLoad:(UIWebView *)webView {
    if ([[webView stringByEvaluatingJavaScriptFromString:@"document.readyState"] isEqualToString:@"complete"]) {
        // UIWebView object has fully loaded.
        NSLog(@"Dom ready");

    }
}


@end

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