Native APIs

Fluuter:Platform Channels

path_provider
致力於封裝生態系統。作用是找出文件儲存在特定平台上的位置。

path_provider. dart  

Future<Directory> getTemporaryDirectory() async {
  final String path =
      await _channel. invokeMethod('get TemporaryDocumentsDirectory');  //呼叫

  if (path == null) {
    return null;
  }
  return Directory(path);

PathProviderplugin.m
[channel setMethodCallHandler:^(FlutterMethodCall* call,
                                FlutterResult result) {
  if ([@"getTemporaryDirectory" isEqualToString:call. method]) {  //傳回
    result ([self getTemporaryDirectory]);
}else (...) {
 ...
}];