add new logic: support phone number login when Wechat is not installed

example/ios/Runner/Runner.entitlements

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.developer.associated-domains</key>
+	<array/>
+</dict>
+</plist>

ios/Classes/FluwxAuthHandler.h

@@ -18,4 +18,6 @@
 - (void)authByQRCode:(FlutterMethodCall *)call result:(FlutterResult)result;
 
 - (void)stopAuthByQRCode:(FlutterMethodCall *)call result:(FlutterResult)result;
+
+- (void)handAuthByPhoneLogin:(FlutterMethodCall*)call result:(FlutterResult)result;
 @end

ios/Classes/FluwxAuthHandler.m

@@ -21,6 +21,16 @@ FlutterMethodChannel *_fluwxMethodChannel = nil;
     return self;
 }
 
+- (void)handAuthByPhoneLogin:(FlutterMethodCall*)call result:(FlutterResult)result{
+    UIViewController *vc = UIApplication.sharedApplication.keyWindow.rootViewController;
+    SendAuthReq *authReq = [[SendAuthReq alloc]init];
+    authReq.scope = @"snsapi_userinfo";
+    authReq.state = @"123";
+    [WXApi sendAuthReq:authReq viewController:vc delegate:[FluwxResponseHandler defaultManager] completion:^(BOOL success) {
+        result(@(success));
+    }];
+}
+
 - (void)handleAuth:(FlutterMethodCall *)call result:(FlutterResult)result {
     NSString *openId = call.arguments[@"openId"];
 

ios/Classes/FluwxPlugin.m

@@ -54,6 +54,8 @@ BOOL handleOpenURLByFluwx = YES;
         [self handleSubscribeWithCall:call result:result];
     } else if ([@"autoDeduct" isEqualToString:call.method]) {
         [self handleAutoDeductWithCall:call result:result];
+    }else if([@"authByPhoneLogin" isEqualToString:call.method]){
+        [_fluwxAuthHandler handAuthByPhoneLogin:call result:result];
     } else if ([call.method hasPrefix:@"share"]) {
         [_fluwxShareHandler handleShare:call result:result];
     } else {
@@ -178,6 +180,7 @@ BOOL handleOpenURLByFluwx = YES;
     }];
 }
 
+
 - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
     return [WXApi handleOpenURL:url delegate:[FluwxResponseHandler defaultManager]];
 }

lib/src/fluwx_iml.dart

@@ -240,3 +240,7 @@ Future _methodHandler(MethodCall methodCall) {
   _weChatResponseEventHandlerController.add(response);
   return Future.value();
 }
+
+Future<bool> authWechatByPhoneLogin() async{
+  return  await _channel.invokeMethod("authByPhoneLogin");
+}