WebView 与js交互基础总结

NSHTTPCookieStorage *sharedHTTPCookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
NSArray *cookies = [sharedHTTPCookieStorage cookiesForURL:[NSURL URLWithString:_theURL]];
NSEnumerator *enumerator = [cookies objectEnumerator];
NSHTTPCookie *cookie;
while (cookie = [enumerator nextObject]) {
NSLog(@"COOKIE{name: %@, value: %@}", [cookie name], [cookie value]);
}

NSString *title = [webView stringByEvaluatingJavaScriptFromString:@"document.title"];
self.navigationItem.title = title;

//禁止粘贴复制
[webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.style.webkitUserSelect='none';"];
// Disable callout
[webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.style.webkitTouchCallout='none';"];

JSContext *context = [self.WebViewChat valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
context[@"wxLogin"] = ^() {
NSArray *args = [JSContext currentArguments];
for (id obj in args) {
//当OC调用JS的方法和JS调用OC的方法名一致时会出现循环调用
NSLog(@"重复调用%@",obj);
}
};

JSContext *context = [self.HomeWebView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
NSString *js = [NSString stringWithFormat:@"getwxUserInfoByApp('%@','%@','%@','%@');",Dic[@"unionid"],Dic[@"nickname"],Dic[@"sex"],Dic[@"headimgurl"]];
[context evaluateScript:js];