Native call WebView's interface

douban · Oct 24, 2016 · e41ca29 · e41ca29
1 parent ec2db10
commit e41ca29
Show file tree

Hide file tree

Showing 2 changed files with 37 additions and 8 deletions.
diff --git a/Rexxar/Core/RXRViewController.h b/Rexxar/Core/RXRViewController.h
@@ -69,6 +69,14 @@ NS_ASSUME_NONNULL_BEGIN
  */
 - (void)onPageInvisible;
 
+/**
+ * 调用 WebView 的一个 JavaScript 函数，并传入一个 json 串作为参数。
+ *
+ * @param function 调用的函数。
+ * @param jsonParameter 传递的参数，json 串。
+ */
+- (nullable NSString *)callJavaScript:(NSString *)function jsonParameter:(nullable NSString *)jsonParameter;
+
 @end
 
 
@@ -87,16 +95,16 @@ NS_ASSUME_NONNULL_BEGIN
 + (void)updateRouteFilesWithCompletion:(nullable void (^)(BOOL success))completion;
 
 /**
- * 判断存在对应于 uri 的 route 信息
+ * 判断路由表是否存在对应于 uri 的 route 信息。
  *
- * @param uri 待判断的 uri
+ * @param uri 待判断的 uri。
  */
 + (BOOL)isRouteExistForURI:(NSURL *)uri;
 
 /**
- * 判断存在对应于 uri 的 route 信息
+ * 判断本地（缓存，或预置资源中）是否已经下载了存在对应于 uri 的 route 信息的资源。
  *
- * @param uri 待判断的 uri
+ * @param uri 待判断的 uri。
  */
 + (BOOL)isLocalRouteFileExistForURI:(NSURL *)uri;
 

diff --git a/Rexxar/Core/RXRViewController.m b/Rexxar/Core/RXRViewController.m
@@ -104,18 +104,39 @@ - (void)reloadWebView
   }
 }
 
+#pragma mark - Native Call WebView JavaScript interfaces.
+
 - (void)onPageVisible
 {
   // Call the WebView's visiblity change hook for javascript.
-  NSString *result = [_webView stringByEvaluatingJavaScriptFromString:@"window.Rexxar.Lifecycle.onPageVisible()"];
-  RXRDebugLog(@"window.Rexxar.Lifecycle.onPageVisible: %@", result);
+  [self callJavaScript:@"window.Rexxar.Lifecycle.onPageVisible" jsonParameter:nil];
 }
 
 - (void)onPageInvisible
 {
   // Call the WebView's visiblity change hook for javascript.
-  NSString *result = [_webView stringByEvaluatingJavaScriptFromString:@"window.Rexxar.Lifecycle.onPageInvisible()"];
-  RXRDebugLog(@"window.Rexxar.Lifecycle.onPageInvisible: %@", result);
+  [self callJavaScript:@"window.Rexxar.Lifecycle.onPageInvisible" jsonParameter:nil];
+}
+
+- (NSString *)callJavaScript:(NSString *)function jsonParameter:(NSString *)jsonParameter
+{
+  NSString *jsCall;
+  if (jsonParameter) {
+    jsonParameter = [jsonParameter stringByReplacingOccurrencesOfString:@"\\" withString:@"\\\\"];
+    jsonParameter = [jsonParameter stringByReplacingOccurrencesOfString:@"\"" withString:@"\\\""];
+    jsonParameter = [jsonParameter stringByReplacingOccurrencesOfString:@"\'" withString:@"\\\'"];
+    jsonParameter = [jsonParameter stringByReplacingOccurrencesOfString:@"\n" withString:@"\\n"];
+    jsonParameter = [jsonParameter stringByReplacingOccurrencesOfString:@"\r" withString:@"\\r"];
+    jsonParameter = [jsonParameter stringByReplacingOccurrencesOfString:@"\f" withString:@"\\f"];
+    jsonParameter = [jsonParameter stringByReplacingOccurrencesOfString:@"\u2028" withString:@"\\u2028"];
+    jsonParameter = [jsonParameter stringByReplacingOccurrencesOfString:@"\u2029" withString:@"\\u2029"];
+    jsCall = [NSString stringWithFormat:@"%@('%@')", function, jsonParameter];
+  } else {
+    jsCall = [NSString stringWithFormat:@"%@()", function];
+  }
+  NSString *result = [_webView stringByEvaluatingJavaScriptFromString:jsCall];
+  RXRDebugLog(@"jsCall: function:%@, parameter %@, result: %@", function, jsonParameter, result);
+  return result;
 }
 
 #pragma mark - UIWebViewDelegate's method