+ [ios] add comment for function and move prerender module

ios/sdk/WeexSDK.xcodeproj/project.pbxproj

@@ -239,8 +239,6 @@
 		C41E1A981DC1FD15009C7F90 /* WXDatePickerManager.m in Sources */ = {isa = PBXBuildFile; fileRef = C41E1A961DC1FD15009C7F90 /* WXDatePickerManager.m */; };
 		C43C03E81EC8ACA40044C7FF /* WXPrerenderManager.h in Headers */ = {isa = PBXBuildFile; fileRef = C43C03E41EC8ACA40044C7FF /* WXPrerenderManager.h */; };
 		C43C03E91EC8ACA40044C7FF /* WXPrerenderManager.m in Sources */ = {isa = PBXBuildFile; fileRef = C43C03E51EC8ACA40044C7FF /* WXPrerenderManager.m */; };
-		C43C03EA1EC8ACA40044C7FF /* WXPrerenderModule.h in Headers */ = {isa = PBXBuildFile; fileRef = C43C03E61EC8ACA40044C7FF /* WXPrerenderModule.h */; };
-		C43C03EB1EC8ACA40044C7FF /* WXPrerenderModule.m in Sources */ = {isa = PBXBuildFile; fileRef = C43C03E71EC8ACA40044C7FF /* WXPrerenderModule.m */; };
 		C4B3D6D41E6954300013F38D /* WXEditComponent.h in Headers */ = {isa = PBXBuildFile; fileRef = C4B3D6D21E6954300013F38D /* WXEditComponent.h */; };
 		C4B3D6D51E6954300013F38D /* WXEditComponent.m in Sources */ = {isa = PBXBuildFile; fileRef = C4B3D6D31E6954300013F38D /* WXEditComponent.m */; };
 		C4B834271DE69B09007AD27E /* WXPickerModule.m in Sources */ = {isa = PBXBuildFile; fileRef = C4B834251DE69B09007AD27E /* WXPickerModule.m */; };
@@ -559,8 +557,6 @@
 		C41E1A961DC1FD15009C7F90 /* WXDatePickerManager.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = WXDatePickerManager.m; sourceTree = "<group>"; };
 		C43C03E41EC8ACA40044C7FF /* WXPrerenderManager.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WXPrerenderManager.h; sourceTree = "<group>"; };
 		C43C03E51EC8ACA40044C7FF /* WXPrerenderManager.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = WXPrerenderManager.m; sourceTree = "<group>"; };
-		C43C03E61EC8ACA40044C7FF /* WXPrerenderModule.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WXPrerenderModule.h; sourceTree = "<group>"; };
-		C43C03E71EC8ACA40044C7FF /* WXPrerenderModule.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = WXPrerenderModule.m; sourceTree = "<group>"; };
 		C4B3D6D21E6954300013F38D /* WXEditComponent.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WXEditComponent.h; sourceTree = "<group>"; };
 		C4B3D6D31E6954300013F38D /* WXEditComponent.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = WXEditComponent.m; sourceTree = "<group>"; };
 		C4B834251DE69B09007AD27E /* WXPickerModule.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = WXPickerModule.m; sourceTree = "<group>"; };
@@ -1068,8 +1064,6 @@
 			children = (
 				C43C03E41EC8ACA40044C7FF /* WXPrerenderManager.h */,
 				C43C03E51EC8ACA40044C7FF /* WXPrerenderManager.m */,
-				C43C03E61EC8ACA40044C7FF /* WXPrerenderModule.h */,
-				C43C03E71EC8ACA40044C7FF /* WXPrerenderModule.m */,
 				C4F012801E1502E9003378D0 /* WXWebSocketModule.h */,
 				C4F012811E1502E9003378D0 /* WXWebSocketModule.m */,
 				C4B834251DE69B09007AD27E /* WXPickerModule.m */,
@@ -1351,7 +1345,6 @@
 				D334510C1D3E19B80083598A /* WXCanvasModule.h in Headers */,
 				742AD73A1DF98C8B007DC46C /* WXResourceLoader.h in Headers */,
 				746319291C71B92600EFEBD4 /* WXModalUIModule.h in Headers */,
-				C43C03EA1EC8ACA40044C7FF /* WXPrerenderModule.h in Headers */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -1584,7 +1577,6 @@
 				D312CE3C1C730DEB00046D68 /* WXWebComponent.m in Sources */,
 				74AD99851D5B0E59008F0336 /* WXPolyfillSet.m in Sources */,
 				D317338D1C57257000BB7539 /* WXTransform.m in Sources */,
-				C43C03EB1EC8ACA40044C7FF /* WXPrerenderModule.m in Sources */,
 				7461F8A91CFC33A800F62D44 /* WXThreadSafeMutableArray.m in Sources */,
 				745B2D6D1E5A8E1E0092D38A /* WXRecyclerDataController.m in Sources */,
 				2AC750251C7565690041D390 /* WXIndicatorComponent.m in Sources */,

ios/sdk/WeexSDK/Sources/Engine/WXSDKEngine.m

@@ -60,7 +60,6 @@ + (void)_registerDefaultModules
     [self registerModule:@"picker" withClass:NSClassFromString(@"WXPickerModule")];
     [self registerModule:@"meta" withClass:NSClassFromString(@"WXMetaModule")];
     [self registerModule:@"webSocket" withClass:NSClassFromString(@"WXWebSocketModule")];
-    [self registerModule:@"prerender" withClass:NSClassFromString(@"WXPrerenderModule")];
 }
 
 + (void)registerModule:(NSString *)name withClass:(Class)clazz

ios/sdk/WeexSDK/Sources/Module/WXPrerenderManager.h

@@ -21,29 +21,68 @@
 #import <WeexSDk/WeexSDK.h>
 
 @class WXModuleMethod;
-typedef NS_ENUM(NSUInteger, PrerenderStatus) {
-    PrerenderSucceed = 0,
-    PrerenderFail = 1,
-};
-typedef NS_ENUM(NSUInteger, PrerenderTaskType) {
-    PrerenderUITaskType = 0,
-    PrerenderMethodType = 1,
-};
-
-typedef void (^PrerenderCallback) (PrerenderStatus status, NSString* urlStr, NSString * msg);
 
 @interface WXPrerenderManager : NSObject
 
 - (instancetype) init NS_UNAVAILABLE;
-+ (instancetype) sharedInstance;
-+ (void) addTask:(NSString *) urlStr WXInstance:(NSString *) instanceId callback:(WXModuleCallback)callback;
+
+/**
+ *  @abstract add prerender task
+ *
+ *  @param url The prerender url string
+ *
+ *  @param instanceId  The instanceId that its instance add prerender task
+ *
+ *  @param callback  the module method callback
+ *
+ **/
++ (void) addTask:(NSString *) url WXInstance:(NSString *)instanceId callback:(WXModuleCallback)callback;
+
+/**
+ *  @abstract Returns true if url is exist in task .
+ *
+ **/
 + (BOOL) isTaskExist:(NSString *)url;
+
+/**
+ *  @abstract Returns error if url is prerender fail .
+ *
+ **/
 + (NSError *)errorFromUrl:(NSString *)url;
+
+/**
+ *  @abstract excute render from prerender cache .
+ *
+ **/
 + (void) renderFromCache:(NSString *)url;
+
+/**
+ *  @abstract Returns prerender root view .
+ *
+ **/
 + (UIView *)viewFromUrl:(NSString *)url;
+
+/**
+ *  @abstract Returns prerender instance .
+ *
+ **/
 + (id)instanceFromUrl:(NSString *)url;
+
+/**
+ *  @abstract Remove prerender task by url .
+ *
+ **/
 + (void)removePrerenderTaskforUrl:(NSString *)url;
+
+/**
+ *  @abstract store prerender module task by url .
+ *
+ **/
 + (void)storePrerenderModuleTasks:(WXModuleMethod *)prerenderModuleTask forUrl:(NSString *)url;
-+ (void)excuteModuleTasksForUrl:(NSString *)url;
+
+/**
+ *  @abstract destroy task , it will destroy instance also.
+ *
+ **/
 + (void)destroyTask:(NSString *)parentInstanceId;
 @end

ios/sdk/WeexSDK/Sources/Module/WXPrerenderManager.m

@@ -83,17 +83,17 @@ - (void) dealloc{
     self.prerenderTasks = nil;
 }
 
-+ (void) addTask:(NSString *)urlStr WXInstance:(NSString *)instanceId callback:(WXModuleCallback)callback{
-    NSURL *url = [NSURL URLWithString:urlStr];
-    if(!url){
-        callback(@{@"url":urlStr,@"message":MSG_PRERENDER_INTERNAL_ERROR,@"result":@"error"});
++ (void) addTask:(NSString *)url WXInstance:(NSString *)instanceId callback:(WXModuleCallback)callback{
+    NSURL *newUrl = [NSURL URLWithString:url];
+    if(!newUrl){
+        callback(@{@"url":url,@"message":MSG_PRERENDER_INTERNAL_ERROR,@"result":@"error"});
         return;
     }
 
     WXPrerenderManager *manager = [WXPrerenderManager sharedInstance];
     __weak WXPrerenderManager *weakSelf = manager;
     dispatch_async(manager.queue, ^{
-        [weakSelf prerender:url WXInstance:instanceId callback:callback];
+        [weakSelf prerender:newUrl WXInstance:instanceId callback:callback];
     });
 }
 
@@ -156,13 +156,17 @@ - (void) prerender:(NSURL *)url WXInstance:(NSString *)instanceId callback:(WXMo
         instance.onCreate = ^(UIView *view) {
             WXPrerenderTask *task = [weakSelf.prerenderTasks objectForKey:url.absoluteString];
             task.view = view;
-            [weakSelf.prerenderTasks setObject:task forKey:url.absoluteString];
+            if(task){
+                [weakSelf.prerenderTasks setObject:task forKey:url.absoluteString];
+            }
         };
 
         instance.onFailed = ^(NSError *error) {
             WXPrerenderTask *task  = [weakSelf.prerenderTasks objectForKey:url.absoluteString];
             task.error = error;
-            [weakSelf.prerenderTasks setObject:task forKey:url.absoluteString];
+            if(task){
+                [weakSelf.prerenderTasks setObject:task forKey:url.absoluteString];
+            }
         };
     }
 }
@@ -245,7 +249,9 @@ + (void)storePrerenderModuleTasks:(WXModuleMethod *)method forUrl:(NSString *)ur
         task.moduleTasks = [NSMutableArray new];
     }
     [task.moduleTasks addObject:method];
-    [manager.prerenderTasks setObject:task forKey:url];
+    if(task){
+        [manager.prerenderTasks setObject:task forKey:url];
+    }
 }
 
 + (void)excuteModuleTasksForUrl:(NSString *)url