Update readme.md

readme.md

@@ -29,7 +29,7 @@ html code:
         </div>
         <button id="openBtn">open</button>
         <button id="uploadBtn">upload</button>
-
+        <button id="takePhotoBtn">takePhoto</button>
         <script type="text/javascript" src="cordova.js"></script>
         <script type="text/javascript" src="js/index.js"></script>
     </body>
@@ -95,6 +95,22 @@ document.addEventListener("MediaPicker.CompressVideoEvent", function(data) {
 }, false);
 ```    
 
+### takePhoto 拍照 
+please add : cordova plugin add cordova-plugin-camera
+index.js **takePhoto** code:
+```
+//please add : cordova plugin add cordova-plugin-camera
+document.getElementById('takePhotoBtn').onclick = function() {
+    //cameraOptions docs https://cordova.apache.org/docs/en/latest/reference/cordova-plugin-camera/index.html#camera
+    var cameraOptions={ quality: 25,mediaType: Camera.MediaType.PICTURE };
+    MediaPicker.takePhoto(function(media) {
+                              media.index=0;//index use to imgs[data.index].src; // media.index=resultMedias.length;
+                              resultMedias.push(media);
+                              getThumbnail(resultMedias);
+                          }, function(e) { console.log(e) }, cameraOptions);
+};
+```    
+
 # More api 其他API
 [API](https://github.com/DmcSDK/cordova-plugin-mediaPicker/blob/master/www/MediaPicker.js) https://github.com/DmcSDK/cordova-plugin-mediaPicker/blob/master/www/MediaPicker.js</br>