fix(image-loader): fix webkit related issue (#82)

Closes #80

Author: leoiii12

src/providers/image-loader.ts

@@ -67,11 +67,11 @@ export class ImageLoader {
   }
 
   private get isWKWebView(): boolean {
-    return this.platform.is('ios') && (<any>window).webkit;
+    return this.platform.is('ios') && (<any>window).webkit && (<any>window).webkit.messageHandlers;
   }
 
   private get isIonicWKWebView(): boolean {
-    return this.isWKWebView && location.host === 'localhost:8080';
+    return this.isWKWebView && (location.host === 'localhost:8080' || (<any>window).LiveReload);
   }
 
   constructor(