flutter代码
class _MyHomePageState extends State<MyHomePage> {
String _nativeCallBackValue = '等待原生传值';
//交互的通道名称,flutter和native是通过这个标识符进行相互间的通信
static const communicateChannel = MethodChannel('https://www.oyear.cn');
//异步执行调用原生方法,保持页面不卡住,因为调用原生的方法可能没实现会抛出异常,所以trycatch包住
Future<void> _communicateFunction(flutterPara) async {
try {
//原生方法名为callNativeMethond,flutterPara为flutter调用原生方法传入的参数,await等待方法执行
final result = await communicateChannel.invokeMethod(
'callNativeMethond', flutterPara);
//如果原生方法执行回调传值给flutter,那下面的代码才会被执行
_nativeCallBackValue = result;
setState(() {});
} on PlatformException catch (e) {
//抛出异常
//flutter: PlatformException(001, 进入异常处理, 进入flutter的trycatch方法的catch方法)
print(e);
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: ListView(
children: <Widget>[
InkWell(
onTap: () {
_communicateFunction({"type": "221133"});
},
child: Container(child: Text("与原生交互"))),
Container(child: Text(_nativeCallBackValue))
],
));
}
}
swift代码
@objc class AppDelegate: FlutterAppDelegate {
override func application(
_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
) -> Bool {
let controller = self.window.rootViewController as! FlutterViewController
let channel = FlutterMethodChannel.init(name: "https://www.oyear.cn", binaryMessenger: controller as! FlutterBinaryMessenger)
channel.setMethodCallHandler { (call, result) in
if call.method == "callNativeMethond" {
let para = call.arguments
print(para!)
result("我是原生返回数据")
}else{
result(FlutterMethodNotImplemented)
}
}
GeneratedPluginRegistrant.register(with: self)
return super.application(application, didFinishLaunchingWithOptions: launchOptions)
}
}