Render themes: SVG resources on iOS

vtm-ios/natives/SVGgh.framework/Headers/SVGghLoader.h

@@ -0,0 +1,47 @@
+//
+//  SVGghLoader.h
+//  SVGgh
+//
+//  Created by Glenn Howes on 4/27/16.
+//  Copyright © 2016 Generally Helpful. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+NS_ASSUME_NONNULL_BEGIN
+@class SVGRenderer;
+
+@protocol SVGghLoader
+/*! @brief method to retrieve an SVGRenderer
+ * @param identifier (a subPath or an XCAsset name for instance
+ * @param bundle usually nil
+ * @return an SVGRender if one can be found
+ */
+-(nullable SVGRenderer*) loadRenderForSVGIdentifier:(NSString*)identifier inBundle:(nullable NSBundle*)bundle;
+@end
+
+typedef NS_ENUM(NSInteger, SVGghLoaderType)
+{
+    SVGghLoaderTypeDefault,
+    SVGghLoaderTypePath,
+    SVGghLoaderTypeDataXCAsset // only available on iOS 9 or above
+};
+
+
+@interface SVGghLoaderManager: NSObject
+/*! @brief method to retrieve the loader used by the UI elements
+ * @return the loader
+ */
++(id<SVGghLoader>) loader;
+
+
+/*! @brief method to retrieve an SVGRenderer
+ * @param loader the loader to use by the widget classes.
+ */
++(void) setLoader:(nullable id<SVGghLoader>)loader; // call only once, passing null will return to th
+
++(void) setLoaderToType:(SVGghLoaderType)type;
+
+@end
+
+
+NS_ASSUME_NONNULL_END