[ios] fix hit testing of nested svg and invalidation on changes.

ios/Elements/RNSVGGroup.m

@@ -173,20 +173,26 @@
         }
     }
 
-    for (RNSVGNode *node in [self.subviews reverseObjectEnumerator]) {
-        if (![node isKindOfClass:[RNSVGNode class]] || [node isKindOfClass:[RNSVGMask class]]) {
-            continue;
-        }
-
-        if (event) {
-            node.active = NO;
-        }
-
-        UIView *hitChild = [node hitTest:transformed withEvent:event];
-
-        if (hitChild) {
-            node.active = YES;
-            return (node.responsible || (node != hitChild)) ? hitChild : self;
+    for (UIView *node in [self.subviews reverseObjectEnumerator]) {
+        if ([node isKindOfClass:[RNSVGNode class]]) {
+            if ([node isKindOfClass:[RNSVGMask class]]) {
+                continue;
+            }
+            RNSVGNode* svgNode = (RNSVGNode*)node;
+            if (event) {
+                svgNode.active = NO;
+            }
+            UIView *hitChild = [svgNode hitTest:transformed withEvent:event];
+            if (hitChild) {
+                svgNode.active = YES;
+                return (svgNode.responsible || (svgNode != hitChild)) ? hitChild : self;
+            }
+        } else if ([node isKindOfClass:[RNSVGSvgView class]]) {
+            RNSVGSvgView* svgView = (RNSVGSvgView*)node;
+            UIView *hitChild = [svgView hitTest:transformed withEvent:event];
+            if (hitChild) {
+                return hitChild;
+            }
         }
     }
 

ios/Elements/RNSVGSvgView.m

@@ -66,6 +66,16 @@
 
 - (void)invalidate
 {
+    UIView* parent = self.superview;
+    if ([parent isKindOfClass:[RNSVGNode class]]) {
+        if (!rendered) {
+            return;
+        }
+        RNSVGNode* svgNode = (RNSVGNode*)parent;
+        [svgNode invalidate];
+        rendered = false;
+        return;
+    }
     [self setNeedsDisplay];
 }
 
@@ -158,7 +168,7 @@
 }
 
 - (void)drawToContext:(CGContextRef)context withRect:(CGRect)rect {
-
+    rendered = true;
     self.initialCTM = CGContextGetCTM(context);
     self.invInitialCTM = CGAffineTransformInvert(self.initialCTM);
     if (self.align) {