完成地图页面的功能，跳转百度、高德、腾讯地图导航，使用webview_flutter来做webview加载

android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java

@@ -4,7 +4,6 @@
 import com.jzoom.amaplocation.AmapLocationPlugin;
 import io.flutter.plugins.connectivity.ConnectivityPlugin;
 import com.github.marekchen.flutterqq.FlutterQqPlugin;
-import com.flutter_webview_plugin.FlutterWebviewPlugin;
 import io.github.ponnamkarthik.toast.fluttertoast.FluttertoastPlugin;
 import io.flutter.plugins.imagepicker.ImagePickerPlugin;
 import com.bigbug.mmkvflutter.MmkvFlutterPlugin;
@@ -14,6 +13,7 @@
 import io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin;
 import com.tekartik.sqflite.SqflitePlugin;
 import io.flutter.plugins.urllauncher.UrlLauncherPlugin;
+import io.flutter.plugins.webviewflutter.WebViewFlutterPlugin;
 
 /**
  * Generated file. Do not edit.
@@ -26,7 +26,6 @@ public static void registerWith(PluginRegistry registry) {
     AmapLocationPlugin.registerWith(registry.registrarFor("com.jzoom.amaplocation.AmapLocationPlugin"));
     ConnectivityPlugin.registerWith(registry.registrarFor("io.flutter.plugins.connectivity.ConnectivityPlugin"));
     FlutterQqPlugin.registerWith(registry.registrarFor("com.github.marekchen.flutterqq.FlutterQqPlugin"));
-    FlutterWebviewPlugin.registerWith(registry.registrarFor("com.flutter_webview_plugin.FlutterWebviewPlugin"));
     FluttertoastPlugin.registerWith(registry.registrarFor("io.github.ponnamkarthik.toast.fluttertoast.FluttertoastPlugin"));
     ImagePickerPlugin.registerWith(registry.registrarFor("io.flutter.plugins.imagepicker.ImagePickerPlugin"));
     MmkvFlutterPlugin.registerWith(registry.registrarFor("com.bigbug.mmkvflutter.MmkvFlutterPlugin"));
@@ -36,6 +35,7 @@ public static void registerWith(PluginRegistry registry) {
     SharedPreferencesPlugin.registerWith(registry.registrarFor("io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin"));
     SqflitePlugin.registerWith(registry.registrarFor("com.tekartik.sqflite.SqflitePlugin"));
     UrlLauncherPlugin.registerWith(registry.registrarFor("io.flutter.plugins.urllauncher.UrlLauncherPlugin"));
+    WebViewFlutterPlugin.registerWith(registry.registrarFor("io.flutter.plugins.webviewflutter.WebViewFlutterPlugin"));
   }
 
   private static boolean alreadyRegisteredWith(PluginRegistry registry) {

ios/.symlinks/plugins/fluttertoast

@@ -1 +1 @@
-/Users/ningyuwen/Code/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/fluttertoast-2.2.11
+/Users/ningyuwen/Code/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/fluttertoast-3.0.4

ios/.symlinks/plugins/image_picker

@@ -1 +1 @@
-/Users/ningyuwen/Code/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/image_picker-0.4.12+1
+/Users/ningyuwen/Code/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/image_picker-0.5.4+3

ios/Flutter/Flutter.framework/Headers/Flutter.h

@@ -8,6 +8,9 @@
 /**
  BREAKING CHANGES:
 
+ December 17, 2018:
+  - Changed designated initializer on FlutterEngine
+
  October 5, 2018:
   - Removed FlutterNavigationController.h/.mm
   - Changed return signature of `FlutterDartHeadlessCodeRunner.run*` from void

ios/Flutter/Flutter.framework/Headers/FlutterBinaryMessenger.h

@@ -61,7 +61,10 @@ FLUTTER_EXPORT
  */
 - (void)sendOnChannel:(NSString*)channel
               message:(NSData* _Nullable)message
-          binaryReply:(FlutterBinaryReply _Nullable)callback;
+          binaryReply:(FlutterBinaryReply _Nullable)callback
+    // TODO: Add macOS support for replies once
+    // https://github.com/flutter/flutter/issues/18852 is fixed.
+    API_UNAVAILABLE(macos);
 
 /**
  * Registers a message handler for incoming binary messages from the Flutter side

ios/Flutter/Flutter.framework/Headers/FlutterChannels.h

@@ -103,7 +103,11 @@ FLUTTER_EXPORT
  * @param message The message. Must be supported by the codec of this channel.
  * @param callback A callback to be invoked with the message reply from Flutter.
  */
-- (void)sendMessage:(id _Nullable)message reply:(FlutterReply _Nullable)callback;
+- (void)sendMessage:(id _Nullable)message
+              reply:(FlutterReply _Nullable)callback
+    // TODO: Add macOS support for replies once
+    // https://github.com/flutter/flutter/issues/18852 is fixed.
+    API_UNAVAILABLE(macos);
 
 /**
  * Registers a message handler with this channel.
@@ -234,7 +238,10 @@ FLUTTER_EXPORT
  */
 - (void)invokeMethod:(NSString*)method
            arguments:(id _Nullable)arguments
-              result:(FlutterResult _Nullable)callback;
+              result:(FlutterResult _Nullable)callback
+    // TODO: Add macOS support for replies once
+    // https://github.com/flutter/flutter/issues/18852 is fixed.
+    API_UNAVAILABLE(macos);
 
 /**
  * Registers a handler for method calls from the Flutter side.

ios/Flutter/Flutter.framework/Headers/FlutterDartProject.h

@@ -26,14 +26,26 @@ FLUTTER_EXPORT
 - (instancetype)initFromDefaultSourceForConfiguration FLUTTER_UNAVAILABLE("Use -init instead.");
 
 /**
- * Returns the file name for the given asset.
- * The returned file name can be used to access the asset in the application's main bundle.
+ * Returns the file name for the given asset. If the bundle with the identifier
+ * "io.flutter.flutter.app" exists, it will try use that bundle; otherwise, it
+ * will use the main bundle.  To specify a different bundle, use
+ * `-lookupKeyForAsset:asset:fromBundle`.
  *
  * @param asset The name of the asset. The name can be hierarchical.
  * @return the file name to be used for lookup in the main bundle.
  */
 + (NSString*)lookupKeyForAsset:(NSString*)asset;
 
+/**
+ * Returns the file name for the given asset.
+ * The returned file name can be used to access the asset in the supplied bundle.
+ *
+ * @param asset The name of the asset. The name can be hierarchical.
+ * @param bundle The `NSBundle` to use for looking up the asset.
+ * @return the file name to be used for lookup in the main bundle.
+ */
++ (NSString*)lookupKeyForAsset:(NSString*)asset fromBundle:(NSBundle*)bundle;
+
 /**
  * Returns the file name for the given asset which originates from the specified package.
  * The returned file name can be used to access the asset in the application's main bundle.
@@ -44,6 +56,19 @@ FLUTTER_EXPORT
  */
 + (NSString*)lookupKeyForAsset:(NSString*)asset fromPackage:(NSString*)package;
 
+/**
+ * Returns the file name for the given asset which originates from the specified package.
+ * The returned file name can be used to access the asset in the specified bundle.
+ *
+ * @param asset The name of the asset. The name can be hierarchical.
+ * @param package The name of the package from which the asset originates.
+ * @param bundle The bundle to use when doing the lookup.
+ * @return the file name to be used for lookup in the main bundle.
+ */
++ (NSString*)lookupKeyForAsset:(NSString*)asset
+                   fromPackage:(NSString*)package
+                    fromBundle:(NSBundle*)bundle;
+
 /**
  * Returns the default identifier for the bundle where we expect to find the Flutter Dart
  * application.

ios/Flutter/Flutter.framework/Headers/FlutterEngine.h

@@ -40,6 +40,27 @@
 FLUTTER_EXPORT
 @interface FlutterEngine
     : NSObject <FlutterBinaryMessenger, FlutterTextureRegistry, FlutterPluginRegistry>
+/**
+ * Initialize this FlutterEngine with a `FlutterDartProject`.
+ *
+ * If the FlutterDartProject is not specified, the FlutterEngine will attempt to locate
+ * the project in a default location (the flutter_assets folder in the iOS application
+ * bundle).
+ *
+ * A newly initialized engine will not run the `FlutterDartProject` until either
+ * `-runWithEntrypoint:` or `-runWithEntrypoint:libraryURI:` is called.
+ *
+ * FlutterEngine created with this method will have allowHeadlessExecution set to `YES`.
+ * This means that the engine will continue to run regardless of whether a `FlutterViewController`
+ * is attached to it or not, until `-destroyContext:` is called or the process finishes.
+ *
+ * @param labelPrefix The label prefix used to identify threads for this instance. Should
+ *   be unique across FlutterEngine instances, and is used in instrumentation to label
+ *   the threads used by this FlutterEngine.
+ * @param projectOrNil The `FlutterDartProject` to run.
+ */
+- (instancetype)initWithName:(NSString*)labelPrefix project:(FlutterDartProject*)projectOrNil;
+
 /**
  * Initialize this FlutterEngine with a `FlutterDartProject`.
  *
@@ -54,16 +75,21 @@ FLUTTER_EXPORT
  *   be unique across FlutterEngine instances, and is used in instrumentation to label
  *   the threads used by this FlutterEngine.
  * @param projectOrNil The `FlutterDartProject` to run.
+ * @param allowHeadlessExecution Whether or not to allow this instance to continue
+ *   running after passing a nil `FlutterViewController` to `-setViewController:`.
  */
 - (instancetype)initWithName:(NSString*)labelPrefix
-                     project:(FlutterDartProject*)projectOrNil NS_DESIGNATED_INITIALIZER;
+                     project:(FlutterDartProject*)projectOrNil
+      allowHeadlessExecution:(BOOL)allowHeadlessExecution NS_DESIGNATED_INITIALIZER;
 
 /**
  * The default initializer is not available for this object.
  * Callers must use `-[FlutterEngine initWithName:project:]`.
  */
 - (instancetype)init NS_UNAVAILABLE;
 
++ (instancetype)new NS_UNAVAILABLE;
+
 /**
  * Runs a Dart program on an Isolate from the main Dart library (i.e. the library that
  * contains `main()`).
@@ -97,6 +123,16 @@ FLUTTER_EXPORT
  */
 - (BOOL)runWithEntrypoint:(NSString*)entrypoint libraryURI:(NSString*)uri;
 
+/**
+ * Destroy running context for an engine.
+ *
+ * This method can be used to force the FlutterEngine object to release all resources.
+ * After sending this message, the object will be in an unusable state until it is deallocated.
+ * Accessing properties or sending messages to it will result in undefined behavior or runtime
+ * errors.
+ */
+- (void)destroyContext;
+
 /**
  * Sets the `FlutterViewController` for this instance.  The FlutterEngine must be
  * running (e.g. a successful call to `-runWithEntrypoint:` or `-runWithEntrypoint:libraryURI`)

ios/Flutter/Flutter.framework/Headers/FlutterHeadlessDartRunner.h

@@ -46,8 +46,25 @@ FLUTTER_DEPRECATED("FlutterEngine should be used rather than FlutterHeadlessDart
  * be unique across FlutterEngine instances
  * @param projectOrNil The `FlutterDartProject` to run.
  */
+- (instancetype)initWithName:(NSString*)labelPrefix project:(FlutterDartProject*)projectOrNil;
+
+/**
+ * Iniitalize this FlutterHeadlessDartRunner with a `FlutterDartProject`.
+ *
+ * If the FlutterDartProject is not specified, the FlutterHeadlessDartRunner will attempt to locate
+ * the project in a default location.
+ *
+ * A newly initialized engine will not run the `FlutterDartProject` until either
+ * `-runWithEntrypoint:` or `-runWithEntrypoint:libraryURI` is called.
+ *
+ * @param labelPrefix The label prefix used to identify threads for this instance. Should
+ * be unique across FlutterEngine instances
+ * @param projectOrNil The `FlutterDartProject` to run.
+ * @param allowHeadlessExecution Must be set to `YES`.
+ */
 - (instancetype)initWithName:(NSString*)labelPrefix
-                     project:(FlutterDartProject*)projectOrNil NS_DESIGNATED_INITIALIZER;
+                     project:(FlutterDartProject*)projectOrNil
+      allowHeadlessExecution:(BOOL)allowHeadlessExecution NS_DESIGNATED_INITIALIZER;
 
 /**
  * Not recommended for use - will initialize with a default label ("io.flutter.headless")

ios/Flutter/Flutter.framework/Headers/FlutterPlugin.h

@@ -16,6 +16,17 @@
 
 NS_ASSUME_NONNULL_BEGIN
 @protocol FlutterPluginRegistrar;
+@protocol FlutterPluginRegistry;
+
+/**
+ * A plugin registration callback.
+ *
+ * Used for registering plugins with additional instances of
+ * `FlutterPluginRegistry`.
+ *
+ * @param registry The registry to register plugins with.
+ */
+typedef void (*FlutterPluginRegistrantCallback)(NSObject<FlutterPluginRegistry>* registry);
 
 /**
  * Implemented by the iOS part of a Flutter plugin.
@@ -44,6 +55,19 @@ NS_ASSUME_NONNULL_BEGIN
  */
 + (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar;
 @optional
+/**
+ * Set a callback for registering plugins to an additional `FlutterPluginRegistry`,
+ * including headless `FlutterEngine` instances.
+ *
+ * This method is typically called from within an application's `AppDelegate` at
+ * startup to allow for plugins which create additional `FlutterEngine` instances
+ * to register the application's plugins.
+ *
+ * @param callback A callback for registering some set of plugins with a
+ *     `FlutterPluginRegistry`.
+ */
++ (void)setPluginRegistrantCallback:(FlutterPluginRegistrantCallback)callback;
+@optional
 /**
  * Called if this plugin has been registered to receive `FlutterMethodCall`s.
  *

ios/Flutter/Flutter.framework/Headers/FlutterViewController.h

@@ -151,6 +151,11 @@ FLUTTER_EXPORT
  */
 @property(nonatomic, getter=isViewOpaque) BOOL viewOpaque;
 
+/**
+ * The `FlutterEngine` instance for this view controller.
+ */
+@property(weak, nonatomic, readonly) FlutterEngine* engine;
+
 @end
 
 #endif  // FLUTTER_FLUTTERVIEWCONTROLLER_H_