add an incremented flag to force the re-render of glview when using GL.Target

RNGL/GLView.h

@@ -6,6 +6,7 @@
 @property (nonatomic) NSDictionary *uniforms;
 @property (nonatomic) NSArray *targetUniforms;
 @property (nonatomic) BOOL opaque;
+@property (nonatomic) NSNumber *targetIncrement;
 
 - (instancetype)initWithBridge:(RCTBridge *)bridge;
 

RNGL/GLView.m

@@ -127,6 +127,11 @@ NSString* srcResource (id res)
   [self setNeedsDisplay];
 }
 
+- (void)setTargetIncrement:(NSNumber *)targetIncrement
+{
+  [self setNeedsDisplay];
+}
+
 - (void)setTargetUniforms:(NSArray *)targetUniforms
 {
   _targetUniforms = targetUniforms;

RNGL/GLViewManager.m

@@ -19,6 +19,7 @@ RCT_EXPORT_VIEW_PROPERTY(uniforms, NSDictionary);
 RCT_EXPORT_VIEW_PROPERTY(shader, NSNumber);
 RCT_EXPORT_VIEW_PROPERTY(targetUniforms, NSArray);
 RCT_EXPORT_VIEW_PROPERTY(opaque, BOOL);
+RCT_EXPORT_VIEW_PROPERTY(targetIncrement, NSNumber);
 
 - (UIView *)view
 {

index.js

@@ -45,6 +45,12 @@ Target.propTypes = {
 
 const GLViewNative = requireNativeComponent("GLView", GLView);
 class GLView extends Component {
+
+  constructor (props, context) {
+    super(props, context);
+    this._targetIncrement = 0; // This is a current workaround to force the refresh of targets
+  }
+
   setNativeProps (props) {
     this.refs.native.setNativeProps(props);
   }
@@ -85,7 +91,13 @@ class GLView extends Component {
       });
       return <View style={parentStyle}>
         {targets}
-        <GLViewNative ref="native" {...props} style={nativeStyle} children={undefined} targetUniforms={targetUniforms} />
+        <GLViewNative
+          ref="native"
+          {...props}
+          style={nativeStyle}
+          children={undefined}
+          targetUniforms={targetUniforms}
+          targetIncrement={this._targetIncrement++} />
       </View>;
     }
     else {