Improved startup message queue for WKWebView

Author: lokimeyburg

Example Apps/ExampleApp-iOS.xcodeproj/project.pbxproj

@@ -7,8 +7,8 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		0E3214AF19EDF7CF0075E78F /* WebKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 0E8082DC19EDD98700479452 /* WebKit.framework */; };
 		0E8082DB19EDC32300479452 /* WKWebViewJavascriptBridge.m in Sources */ = {isa = PBXBuildFile; fileRef = 0E8082DA19EDC32300479452 /* WKWebViewJavascriptBridge.m */; };
-		0E8082DD19EDD98700479452 /* WebKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 0E8082DC19EDD98700479452 /* WebKit.framework */; settings = {ATTRIBUTES = (Weak, ); }; };
 		2C1562B5176B9F8400B4AE50 /* WebViewJavascriptBridge.js.txt in Resources */ = {isa = PBXBuildFile; fileRef = 2C1562B4176B9F8400B4AE50 /* WebViewJavascriptBridge.js.txt */; };
 		2C1562C0176BA63500B4AE50 /* WebViewJavascriptBridge.m in Sources */ = {isa = PBXBuildFile; fileRef = 2C1562A9176B9F6200B4AE50 /* WebViewJavascriptBridge.m */; };
 		2C45CA2C1884AD520002A4E2 /* ExampleAppViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 2C45CA2B1884AD520002A4E2 /* ExampleAppViewController.m */; };
@@ -50,7 +50,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				0E8082DD19EDD98700479452 /* WebKit.framework in Frameworks */,
+				0E3214AF19EDF7CF0075E78F /* WebKit.framework in Frameworks */,
 				2CEB3EC01602563600548120 /* UIKit.framework in Frameworks */,
 				2CEB3EC21602563600548120 /* Foundation.framework in Frameworks */,
 				2CEB3EC41602563600548120 /* CoreGraphics.framework in Frameworks */,

WebViewJavascriptBridge/WKWebViewJavascriptBridge.h

@@ -5,8 +5,9 @@
 //  Copyright (c) 2014 Loki Meyburg. All rights reserved.
 //
 
-#import <Foundation/Foundation.h>
+#if defined(__IPHONE_8_0)
 
+#import <Foundation/Foundation.h>
 #define kCustomProtocolScheme @"wvjbscheme"
 #define kQueueHasMessage      @"__WVJB_QUEUE_MESSAGE__"
 
@@ -29,4 +30,6 @@ typedef void (^WVJBHandler)(id data, WVJBResponseCallback responseCallback);
 - (void)callHandler:(NSString*)handlerName data:(id)data responseCallback:(WVJBResponseCallback)responseCallback;
 - (void)reset;
 
-@end
+@end
+
+#endif

WebViewJavascriptBridge/WKWebViewJavascriptBridge.m

@@ -5,6 +5,8 @@
 //  Copyright (c) 2014 Loki Meyburg. All rights reserved.
 //
 
+#if defined(__IPHONE_8_0)
+
 #import "WKWebViewJavascriptBridge.h"
 
 typedef NSDictionary WVJBMessage;
@@ -236,28 +238,29 @@ - (void)WKFlushMessageQueue {
 
 - (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation
 {
+    NSLog(@"1. Finished navigation");
     if (webView != _webView) { return; }
 
     _numRequestsLoading--;
 
     if (_numRequestsLoading == 0) {
-        
         [webView evaluateJavaScript:@"typeof WebViewJavascriptBridge == \'object\';" completionHandler:^(NSString *result, NSError *error) {
             if(![result boolValue]){
                 NSBundle *bundle = _resourceBundle ? _resourceBundle : [NSBundle mainBundle];
                 NSString *filePath = [bundle pathForResource:@"WebViewJavascriptBridge.js" ofType:@"txt"];
                 NSString *js = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
                 [webView evaluateJavaScript:js completionHandler:nil];
+                
+                if (_startupMessageQueue) {
+                    for (id queuedMessage in _startupMessageQueue) {
+                        [self _dispatchMessage:queuedMessage];
+                    }
+                    _startupMessageQueue = nil;
+                }
             }
         }];
     }
 
-    if (_startupMessageQueue) {
-        for (id queuedMessage in _startupMessageQueue) {
-            [self _dispatchMessage:queuedMessage];
-        }
-        _startupMessageQueue = nil;
-    }
 
     __strong typeof(_webViewDelegate) strongDelegate = _webViewDelegate;
     if (strongDelegate && [strongDelegate respondsToSelector:@selector(webView:didFinishNavigation:)]) {
@@ -317,3 +320,6 @@ - (void)webView:(WKWebView *)webView
 
 
 @end
+
+
+#endif