Question

我有以下简单的 const { ethers } = require("ethers"); const walletAddress = "My_own_address"; const wethErc20Address = "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2"; const uniErc20Address = "0x1f9840a85d5af5bf1d1762f925bdaddc4201f984"; const uniswapRouterAbi = [ "function swapExactTokensForTokens(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts)", ]; async function buyListedTokenWithEth( amountEthFloat, uniswapRouterAddress, provider ) { const wallet = new ethers.Wallet(Buffer.from(privateKey, "hex")); const signer = wallet.connect(provider); //provider is Infura https ROPSTEN url const exchangeContract = new ethers.Contract( uniswapRouterAddress, uniswapRouterAbi, signer ); const ethAmount = ethers.utils.parseEther("0.1"); const tx = await exchangeContract.swapExactTokensForTokens( ethAmount, 0, [wethErc20Address, uniErc20Address], walletAddress, createDeadline(), // Math.floor(Date.now() / 1000) + 20 createGasOverrides() // { gasLimit: ethers.utils.hexlify(300000), gasPrice: gasPriceWei } ); console.log("https://ropsten.etherscan.io/tx/" + tx.hash); } 文件，其中包含 4 张图像的 Gridview：

main.dart

在第一个 import 'package:flutter/material.dart'; import 'theme/config.dart'; void main() => runApp(_MyApp()); class _MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( theme: configTheme, home: Scaffold( body: GridView.count( crossAxisCount: 2, children: <Widget>[ Image.network( 'https://static01.nyt.com/images/2020/06/30/business/30india-tech-1/30india-tech-1-articleLarge.jpg?quality=75&auto=webp&disable=upscale', fit: BoxFit.cover, height: 100, ), Image.network( 'https://static01.nyt.com/images/2020/06/30/business/30india-tech-1/30india-tech-1-articleLarge.jpg?quality=75&auto=webp&disable=upscale', fit: BoxFit.cover, ), Image.network( 'https://static01.nyt.com/images/2020/06/30/business/30india-tech-1/30india-tech-1-articleLarge.jpg?quality=75&auto=webp&disable=upscale', fit: BoxFit.cover, ), Image.network( 'https://static01.nyt.com/images/2020/06/30/business/30india-tech-1/30india-tech-1-articleLarge.jpg?quality=75&auto=webp&disable=upscale', fit: BoxFit.cover, ), ], ), ), ); } } 元素中，我应用了 Image 但这会被忽略（无论值是什么）。

如何解决这个问题，以便我可以应用任何高度？

Answer 1

Scaffold(
     
      body: new Container(
        child: new GridView.count(
          crossAxisCount: 2,
          controller: new ScrollController(keepScrollOffset: false),
          shrinkWrap: true,
          scrollDirection: Axis.vertical,
            children: <Widget>[
            Image.network(
              'https://static01.nyt.com/images/2020/06/30/business/30india-tech-1/30india-tech-1-articleLarge.jpg?quality=75&auto=webp&disable=upscale',
              fit: BoxFit.cover,
              height: 100,
            ),
            Image.network(
              'https://static01.nyt.com/images/2020/06/30/business/30india-tech-1/30india-tech-1-articleLarge.jpg?quality=75&auto=webp&disable=upscale',
              fit: BoxFit.cover,
            ),
            Image.network(
              'https://static01.nyt.com/images/2020/06/30/business/30india-tech-1/30india-tech-1-articleLarge.jpg?quality=75&auto=webp&disable=upscale',
              fit: BoxFit.cover,
            ),
            Image.network(
              'https://static01.nyt.com/images/2020/06/30/business/30india-tech-1/30india-tech-1-articleLarge.jpg?quality=75&auto=webp&disable=upscale',
              fit: BoxFit.cover,
            ),
          ],
        ),
      ),
    );

图像高度被忽略

1 个答案: