refactor shape elements add responder system.

refactor shape elements add responder system.
Just iOS.

ios/Elements/RNSVGSvgView.m

@@ -0,0 +1,34 @@
+/**
+ * Copyright (c) 2015-present, Horcrux.
+ * All rights reserved.
+ *
+ * This source code is licensed under the MIT-style license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import "RNSVGSvgView.h"
+
+#import "RNSVGNode.h"
+#import "RCTLog.h"
+
+@implementation RNSVGSvgView
+
+- (void)invalidate
+{
+    [self setNeedsDisplay];
+}
+
+- (void)drawRect:(CGRect)rect
+{
+    CGContextRef context = UIGraphicsGetCurrentContext();
+    for (RNSVGNode *node in self.subviews) {
+        [node renderTo:context];
+    }
+}
+
+- (void)reactSetInheritedBackgroundColor:(UIColor *)inheritedBackgroundColor
+{
+    self.backgroundColor = inheritedBackgroundColor;
+}
+
+@end