flutter 学习笔记7

时钟，左下角是天气预报

Flutter 的例子

main.dart

import 'dart:io';

import 'package:flutter_clock_helper/customizer.dart';
import 'package:flutter_clock_helper/model.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';

import 'analog_clock.dart';

void main() {
  // A temporary measure until Platform supports web and TargetPlatform supports
  // macOS.
  if (!kIsWeb && Platform.isMacOS) {
    // TODO(gspencergoog): Update this when TargetPlatform includes macOS.
    // https://github.com/flutter/flutter/issues/31366
    // See https://github.com/flutter/flutter/wiki/Desktop-shells#target-platform-override.
    debugDefaultTargetPlatformOverride = TargetPlatform.fuchsia;
  }

  // This creates a clock that enables you to customize it.
  //
  // The [ClockCustomizer] takes in a [ClockBuilder] that consists of:
  //  - A clock widget (in this case, [AnalogClock])
  //  - A model (provided to you by [ClockModel])
  // For more information, see the flutter_clock_helper package.
  //
  // Your job is to edit [AnalogClock], or replace it with your own clock
  // widget. (Look in analog_clock.dart for more details!)
  runApp(ClockCustomizer((ClockModel model) => AnalogClock(model)));
}

修改一下为：