iOS objective-c 如何在 UIWebView 中捕获 window.open 事件

Question

我正在开发由Objective-C编码的iOS混合应用程序。我想在UIWebView中捕获"window.open"事件。我找到了这个代码。

-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
if (navigationType == UIWebViewNavigationTypeLinkClicked ){       
NSLog(@"opening link");
return NO;
}
....
...
return YES;
}
- (void)webViewDidFinishLoad:(UIWebView *)webView {
NSString * test =  [webView stringByEvaluatingJavaScriptFromString:@"window.open = function (open) { return function  (url, name, features) { window.location.href = url; return window; }; } (window.open);"];
//
NSLog(@"test:%@", test);   << always print blank
....
...
..
}

info.plist
<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsArbitraryLoads</key>
<true/>
</dict>

但它不仅捕获"window.open"，还捕获其他链接事件。一些答案建议使用"stringByEvaluatingJavaScriptFromString"，但我不明白。

你能解释一下，让初学者容易理解吗？我只想在UIWebView中捕获"window.open"事件。

Answer 1

您需要使用以下代码来检测窗口打开：

[webView stringByEvaluatingJavaScriptFromString:@"window.open = function (open) { return function  (url, name, features) { window.location.href = url; return window; }; } (window.open);"];

尝试将上面的代码放在委托方法下面：

- (void)webViewDidFinishLoad:(UIWebView *)webView {}