UIWebView响应Javascript调用 [英] UIWebView respond to Javascript calls
问题描述
如何像Mobile Safari那样拦截Javascript调用，例如 window.open ？我没有看到任何关于此的列表，但它必须以某种方式可能吗？
How can I intercept Javascript calls such as window.open as Mobile Safari does? I haven't seen anything listed about this, but it must be possible somehow?
以前是否有人这样做过？
Has anyone done this before?
推荐答案
当页面是完成加载（webViewDidFinishLoad :)，注入一个window.open覆盖。当然，它不适用于在页面加载期间调用的window.open。
然后使用自定义方案回调您的目标C代码。
好的我已经测试过了。现在它可以工作。
创建一个新的基于视图的项目，并使用IB在viewcontroller xib中添加一个webview。
When the page is finished loaded (webViewDidFinishLoad:), inject a window.open override. Of course it will not work for window.open which are called during page load.
Then use a custom scheme to callback your objective C code.
OK I have tested it. Now it works.
Create a new "view based" project and add a webview in the viewcontroller xib using IB.
@implementation todel2ViewController
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
NSString* page = @"<html><head></head><body><div onclick='javascript:window.open(\"http://www.google.com\");'>this is a test<br/>dfsfsdfsdfsdfdsfs</div></body></html>";
[self.view loadHTMLString:page baseURL:[NSURL URLWithString:@""]];
}
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
NSString* urlString = [[request URL ] absoluteString ];
NSLog(@"shouldStartLoadWithRequest navigationType=%d", navigationType);
NSLog(@"%@", urlString);
if ([[[request URL] scheme] isEqualToString:@"myappscheme"] == YES)
{
//do something
NSLog(@"it works");
}
return YES;
}
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
//Override Window
NSString*override = [NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"NewWindow" ofType:@"js"] encoding:4 error:nil];
[self.view stringByEvaluatingJavaScriptFromString:override];
}
@end
Javascript：
The Javascript:
var open_ = window.open;
window.open = function(url, name, properties)
{
var prefix = 'csmobile://';
var address = url;
open_(prefix + address);
return open_(url, name, properties);
};
日志
2011-07-05 14:17:04.383 todel2[31038:207] shouldStartLoadWithRequest navigationType=5
2011-07-05 14:17:04.383 todel2[31038:207] myappscheme:it%20works
2011-07-05 14:17:04.384 todel2[31038:207] it works
2011-07-05 14:17:04.386 todel2[31038:207] shouldStartLoadWithRequest navigationType=5
2011-07-05 14:17:04.386 todel2[31038:207] http://www.google.com/
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