add weak fallback for iOS 4

Author: Peyton Randolph

WebViewJavascriptBridgeAbstract/WebViewJavascriptBridgeAbstract.h

@@ -2,13 +2,21 @@
 #define kCustomProtocolScheme @"wvjbscheme"
 #define kQueueHasMessage      @"__WVJB_QUEUE_MESSAGE__"
 
+#if TARGET_OS_IPHONE && defined(__IPHONE_5_0) && (__IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_5_0)
+    #define WEAK_FALLBACK weak
+#elif TARGET_OS_MAC && defined(__MAC_10_7) && (__MAC_OS_X_VERSION_MAX_ALLOWED >= __MAC_10_7)
+    #define WEAK_FALLBACK weak
+#else
+    #define WEAK_FALLBACK unsafe_unretained
+#endif
+
 typedef void (^WVJBResponseCallback)(id responseData);
 typedef void (^WVJBHandler)(id data, WVJBResponseCallback responseCallback);
 
 @interface WebViewJavascriptBridgeAbstract : NSObject
 
-@property (nonatomic, weak) id webView;
-@property (nonatomic, weak) id webViewDelegate;
+@property (nonatomic, WEAK_FALLBACK) id webView;
+@property (nonatomic, WEAK_FALLBACK) id webViewDelegate;
 @property (nonatomic, strong) NSMutableArray *startupMessageQueue;
 @property (nonatomic, strong) NSMutableDictionary *responseCallbacks;
 @property (nonatomic, strong) NSMutableDictionary *messageHandlers;

WebViewJavascriptBridge_OSX/WebViewJavascriptBridge_OSX.h

@@ -3,8 +3,8 @@
 
 @interface WebViewJavascriptBridge : WebViewJavascriptBridgeAbstract
 
-@property (nonatomic, weak) WebView *webView;
-@property (nonatomic, weak) id webViewDelegate;
+@property (nonatomic, WEAK_FALLBACK) WebView *webView;
+@property (nonatomic, WEAK_FALLBACK) id webViewDelegate;
 
 + (id)bridgeForWebView:(WebView*)webView handler:(WVJBHandler)handler;
 + (id)bridgeForWebView:(WebView*)webView webViewDelegate:(id)webViewDelegate handler:(WVJBHandler)handler;

WebViewJavascriptBridge_iOS/WebViewJavascriptBridge_iOS.h

@@ -3,8 +3,8 @@
 
 @interface WebViewJavascriptBridge : WebViewJavascriptBridgeAbstract <UIWebViewDelegate>
 
-@property (nonatomic, weak) UIWebView *webView;
-@property (nonatomic, weak) id <UIWebViewDelegate> webViewDelegate;
+@property (nonatomic, WEAK_FALLBACK) UIWebView *webView;
+@property (nonatomic, WEAK_FALLBACK) id <UIWebViewDelegate> webViewDelegate;
 
 + (id)bridgeForWebView:(UIWebView*)webView handler:(WVJBHandler)handler;
 + (id)bridgeForWebView:(UIWebView*)webView webViewDelegate:(id <UIWebViewDelegate>)webViewDelegate handler:(WVJBHandler)handler;