[TIMOB-20286] iOS/Android: Expose Ti.UI.View.getViewById method

android/titanium/src/java/org/appcelerator/titanium/proxy/TiViewProxy.java

@@ -737,7 +737,32 @@ public void removeAllChildren()
 			}
 		}
 	}
+
+	/**
+	* Returns the view by the given ID.
+	* @module.api
+	*/
+	@Kroll.method
+	public TiViewProxy getViewById(String arg)
+	{
+		if (children != null) {
+			for (TiViewProxy child : children) {
+				if (child.children != null && child.children.size() > 0) {
+					TiViewProxy parentChild = child.getViewById(arg);
+					if (parentChild != null) {
+						return parentChild;
+					}
+				}
+
+				if (child.getProperty(TiC.PROPERTY_ID) && child.getProperty(TiC.PROPERTY_ID).equals(arg)) {
+					return child;
+				}
+			}
+		}
 
+		return null;
+	}
+
 	public void handleRemove(TiViewProxy child)
 	{
 		if (children != null) {

apidoc/Titanium/UI/View.yml

@@ -949,6 +949,20 @@ methods:
             is not a view, an exception will be raised.
         type: Titanium.UI.View
 
+  - name: getViewById
+    summary: Returns the matching view of a given view ID.
+    returns:
+        type: Titanium.UI.View
+    parameters:
+      - name: id
+        summary: |
+            The ID of the view that should be returned. Use the `id` property in your views to 
+            enable it for indexing in this method.
+        type: String
+        optional: false
+    since: 6.1.0
+    platforms: [iphone, ipad, android]
+
 properties:
   - name: accessibilityHidden
     summary: Whether the view should be "hidden" from (i.e., ignored by) the accessibility service.

iphone/Classes/TiViewProxy.h

@@ -209,6 +209,12 @@ enum
  */
 -(void)hide:(id)arg;
 
+/**
+ Returns the view by the given ID.
+ @param arg The ID of the view to receive.
+ */
+-(id)getViewById:(id)arg;
+
 /**
  Tells the view proxy to run animation on its view.
  @param arg An animation object.

iphone/Classes/TiViewProxy.m

@@ -388,6 +388,26 @@ -(void)hide:(id)arg
     }, NO);
 }
 
+-(id)getViewById:(id)arg
+{
+    ENSURE_SINGLE_ARG(arg, NSString);
+
+    for (TiViewProxy *child in [self children]) {
+        if ([[child children] count] > 0) {
+            TiViewProxy *parentChild = [child getViewById:arg];
+            if (parentChild) {
+                return parentChild;
+            }
+        }
+
+        if ([[child valueForKey:@"id"] isEqualToString:arg]) {
+            return child;
+        }
+    }
+
+    return nil;
+}
+
 -(void)animate:(id)arg
 {
 	TiAnimation * newAnimation = [TiAnimation animationFromArg:arg context:[self executionContext] create:NO];