Android/IOS/Web跳转第三方QQ指定QQ号的聊天框，实现陌生人聊天

String url="mqqwpa://im/chat?chat_type=wpa&uin=1642084864";
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
//指定的QQ号只需要修改uin后的值即可。

UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectZero];
NSURL *url = [NSURL URLWithString:@"mqq://im/chat?chat_type=wpa&uin=123456&version=1&src_type=web"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
webView.delegate = self;
[webView loadRequest:request];
[self.view addSubview:webView];

<a target="_blank" href="http://wpa.qq.com/msgrd?v=3&uin=123456&site=qq&menu=yes">click here</a><a target="_blank" href="http://wpa.qq.com/msgrd?v=3&uin=123456&site=qq&menu=yes">click here</a>