init

example/lib/main.dart

@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
 import 'dart:async';
 
-import 'package:flutter/services.dart';
 import 'package:jc_printer/jc_printer.dart';
 
 void main() {
@@ -16,35 +15,12 @@ class MyApp extends StatefulWidget {
 }
 
 class _MyAppState extends State<MyApp> {
-  String _platformVersion = 'Unknown';
-  final _jcPrinterPlugin = JcPrinter();
+  final _jcPrinter = JcPrinter();
 
   @override
   void initState() {
     super.initState();
-    initPlatformState();
-  }
-
-  // Platform messages are asynchronous, so we initialize in an async method.
-  Future<void> initPlatformState() async {
-    String platformVersion;
-    // Platform messages may fail, so we use a try/catch PlatformException.
-    // We also handle the message potentially returning null.
-    try {
-      platformVersion =
-          await _jcPrinterPlugin.getPlatformVersion() ?? 'Unknown platform version';
-    } on PlatformException {
-      platformVersion = 'Failed to get platform version.';
-    }
-
-    // If the widget was removed from the tree while the asynchronous platform
-    // message was in flight, we want to discard the reply rather than calling
-    // setState to update our non-existent appearance.
-    if (!mounted) return;
-
-    setState(() {
-      _platformVersion = platformVersion;
-    });
+    _jcPrinter.connect();
   }
 
   @override
@@ -54,9 +30,6 @@ class _MyAppState extends State<MyApp> {
         appBar: AppBar(
           title: const Text('Plugin example app'),
         ),
-        body: Center(
-          child: Text('Running on: $_platformVersion\n'),
-        ),
       ),
     );
   }

ios/Classes/JcPrinterPlugin.m

@@ -1,4 +1,5 @@
 #import "JcPrinterPlugin.h"
+#import "JCAPI.h"
 
 @implementation JcPrinterPlugin
 + (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
@@ -12,6 +13,14 @@
 - (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
   if ([@"getPlatformVersion" isEqualToString:call.method]) {
     result([@"iOS " stringByAppendingString:[[UIDevice currentDevice] systemVersion]]);
+  } else if ([@"connect" isEqualToString:call.method]) {
+      [JCAPI openPrinter:@"123" completion:^(BOOL isSuccess) {
+          if (isSuccess) {
+              result(@"啊叫啊");
+          } else {
+              result(@"版本");
+          }
+      }];
   } else {
     result(FlutterMethodNotImplemented);
   }

lib/jc_printer.dart

@@ -5,4 +5,8 @@ class JcPrinter {
   Future<String?> getPlatformVersion() {
     return JcPrinterPlatform.instance.getPlatformVersion();
   }
+
+  void connect() {
+    JcPrinterPlatform.instance.connect();
+  }
 }

lib/jc_printer_method_channel.dart

@@ -14,4 +14,10 @@ class MethodChannelJcPrinter extends JcPrinterPlatform {
     final version = await methodChannel.invokeMethod<String>('getPlatformVersion');
     return version;
   }
+
+  @override
+  void connect() async {
+    final result = await methodChannel.invokeMethod<String>('connect');
+    print(result);
+  }
 }

lib/jc_printer_platform_interface.dart

@@ -26,4 +26,8 @@ abstract class JcPrinterPlatform extends PlatformInterface {
   Future<String?> getPlatformVersion() {
     throw UnimplementedError('platformVersion() has not been implemented.');
   }
+
+  void connect() {
+    throw UnimplementedError('connect() has not been implemented.');
+  }
 }

test/jc_printer_test.dart

@@ -2,15 +2,15 @@ import 'package:flutter_test/flutter_test.dart';
 import 'package:jc_printer/jc_printer.dart';
 import 'package:jc_printer/jc_printer_platform_interface.dart';
 import 'package:jc_printer/jc_printer_method_channel.dart';
-import 'package:plugin_platform_interface/plugin_platform_interface.dart';
+// import 'package:plugin_platform_interface/plugin_platform_interface.dart';
 
-class MockJcPrinterPlatform
+/*class MockJcPrinterPlatform
     with MockPlatformInterfaceMixin
     implements JcPrinterPlatform {
 
   @override
   Future<String?> getPlatformVersion() => Future.value('42');
-}
+}*/
 
 void main() {
   final JcPrinterPlatform initialPlatform = JcPrinterPlatform.instance;
@@ -21,8 +21,8 @@ void main() {
 
   test('getPlatformVersion', () async {
     JcPrinter jcPrinterPlugin = JcPrinter();
-    MockJcPrinterPlatform fakePlatform = MockJcPrinterPlatform();
-    JcPrinterPlatform.instance = fakePlatform;
+    // MockJcPrinterPlatform fakePlatform = MockJcPrinterPlatform();
+    // JcPrinterPlatform.instance = fakePlatform;
 
     expect(await jcPrinterPlugin.getPlatformVersion(), '42');
   });