
using UnityEngine;
using System.Collections;

public class Main : MonoBehaviour {

	private UniWebView _webView;
	private string _errorMessage;

	// Use this for initialization
	void Start () {
		Debug.Log (this._errorMessage);

		_webView = GetComponent<UniWebView>();
		if (_webView == null) {

			//	User agent masquerade.
			UniWebView.SetUserAgent ("Mozilla/5.0 (iPhone; CPU iPhone OS 8_0 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12A365 Safari/600.1.4");

			_webView = gameObject.AddComponent<UniWebView>();
			_webView.OnReceivedMessage += OnReceivedMessage;
			_webView.OnLoadComplete += OnLoadComplete;
			_webView.OnWebViewShouldClose += OnWebViewShouldClose;
			_webView.OnEvalJavaScriptFinished += OnEvalJavaScriptFinished;
			_webView.InsetsForScreenOreitation += InsetsForScreenOreitation;
		}
		_webView.url = "https://uqunie.com/useragent";
		_webView.Load();
		_webView.Show ();
		_errorMessage = null;
	}

	void OnLoadComplete(UniWebView webView, bool success, string errorMessage) {
		if (success) {
			webView.Show();
		} else {
			Debug.Log("Something wrong in webview loading: " + errorMessage);
			_errorMessage = errorMessage;
		}
	}

	bool OnWebViewShouldClose(UniWebView webView) {
		if (webView == _webView) {
			_webView = null;
			return true;
		}
		return false;
	}

	void OnReceivedMessage(UniWebView webView, UniWebViewMessage message) {
		/**
		 * From WebView's message.
		 * 
		 * Ex:
		 * uniwebview://command?foo=true&bar=false&num=1
		 */
		Debug.Log(message.rawMessage);
		Debug.Log(message.path); // command
		Debug.Log(message.args["foo"]); // true  (string)
		Debug.Log(message.args["bar"]); // false (string)
		Debug.Log(message.args["num"]); // 1     (string)
	}

	void OnEvalJavaScriptFinished(UniWebView webView, string result) {
		Debug.Log("js result: " + result);
	//	tipTextMesh.text = "<color=#000000>" + result + "</color>";
	}

	UniWebViewEdgeInsets InsetsForScreenOreitation(UniWebView webView, UniWebViewOrientation orientation) {
		/*
		int bottomInset = (int)(UniWebViewHelper.screenHeight * 0.1f);

		if (orientation == UniWebViewOrientation.Portrait) {
			return new UniWebViewEdgeInsets(5,5,bottomInset,5);
		} else {
			return new UniWebViewEdgeInsets(5,5,bottomInset,5);
		}
		*/
		return new UniWebViewEdgeInsets(0, 0, 0, 0);
	}

	// Update is called once per frame
	void Update () {
	
	}
}

Call from html.

<a href="uniwebview://command?foo=bar">button</a>

Call from javascript.

location.href = "uniwebview://command?foo=bar";