text: //
  //  WKWebView + SafeEvaluateJS.h
  //  WKWebViewExtension
  //
  //  Created by dequanzhu.
  //  Copyright © 2018 HybridPageKit. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  #import <WebKit/WebKit.h>
  
  typedef void (^SafeEvaluateJSCompletion)(NSObject *result);
  
  @interface WKWebView (SafeEvaluateJS)
  /**
   *  Safe Evaluate JS And Retainify Webview For CallBack
   */
  - (void)safeAsyncEvaluateJavaScriptString:(NSString *)script;
  
  /**
   *  Safe Evaluate JS And Retainify Webview For CallBack
   *  Make Sure CallBack IS NSString
   */
  - (void)safeAsyncEvaluateJavaScriptString:(NSString *)script completionBlock:(SafeEvaluateJSCompletion)block;
  
  @end
  