函数接口防抖

copy to dartpad test；

---

‘’‘dart

typedef HttpRequestMethod = Future Function();

void main() {

var http = Http();

start(http,isDebounce:true);

}

var count = 0;

void start(Http http,{isDebounce = false}) async{

  if(count >= 10){

    count = 0;

    return;

  }

  print("接口访问 count：$count");

  //1.0

//  http.getRequest(isDebounce:isDebounce);

  //2.0

  http.getRequestFunction( () async{

    await Future.delayed(Duration(seconds: 1));

    print("模拟接口访问返回");

    return Future.value(true);

  } ,isDebounce:isDebounce);

  //测试sleep

  await Future.delayed(Duration(seconds: 1));

  count ++;

  return start(http,isDebounce:isDebounce);

}

class Http {

  List _methods = [];

  //isDebounce version 1.0

  void getRequest({identify  = "getRequest",isDebounce = false,effectivenessTime = 5}){

    if(isDebounce){

      if(_methods.contains(identify)){

        print("被拦截");

        return;

      }

      _methods.add(identify);

    }

    Future.delayed(Duration(seconds:1),(){

      print("模拟接口访问返回 count:$count");

      Future.delayed(Duration(seconds:effectivenessTime),(){

        if(isDebounce){

          print("可进行下一次访问");

          _methods.remove(identify);

        }

      });

    });

  }

  //isDebounce version 2.0

  void getRequestFunction(HttpRequestMethod function,{identify  = "getRequestFunction",isDebounce = false,effectivenessTime = 5}) {

    if(isDebounce){

      if(_methods.contains(identify)){

        print("被拦截");

        return;

      }

      _methods.add(identify);

    }

  function().then((isFinish){

      Future.delayed(Duration(seconds:effectivenessTime),(){

        if(isFinish && isDebounce){

          print("可进行下一次访问");

          _methods.remove(identify);

        }

      });

  });

  }

}

’‘’