问fetch - Works Local上的React Native Network请求失败

EN

   // The fetchData function makes an AJAX call to the OMDB API.
   fetchData(movieinput) {
     console.log("In fetch");
       // We pass the movie the user entered in into the URL for the API call.
       fetch('http://www.omdbapi.com/?t='+movieinput+'&y=&plot=short&r=json')
           .then((response) => response.json())
           .then((responseData) => {
               // After the data is recieved, we set this.state.movie to the result of the API call.
               this.setState({
                   movie: responseData,
               });
           })
           .done();
   }

   fetchData(movieinput) {
     console.log("In fetch");
       // We pass the movie the user entered in into the URL for the API call.
       fetch('http://localhost:3000/movie/'+movieinput)
           .then((response) => response.json())
           .then((responseData) => {
               // After the data is recieved, we set this.state.movie to the result of the API call.
               this.setState({
                   movie: JSON.parse(responseData),
               });
           })
           .done();
   }