WKWebView系列--调起发信息等

• WKWebView中点击按钮调起短信、邮件无反应
  UIWebview正常没问题
  需要在WKWebView的代理方法中添加一下代码解决问题

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
    if ([navigationAction.request.URL.scheme isEqualToString:@"sms"]) {
        //  短信
        [[UIApplication sharedApplication] openURL:navigationAction.request.URL];
    } else if ([navigationAction.request.URL.scheme isEqualToString:@"mailto"]) {
        //  邮件
        [[UIApplication sharedApplication] openURL:navigationAction.request.URL];
    } else {
        decisionHandler(WKNavigationActionPolicyAllow);
        return;
    }

    decisionHandler(WKNavigationActionPolicyCancel);
}