在字节跳动上显示这样的。在手机上扫字节跳动的码的话，则会出现部分资源下不下来，然后进行黑屏的样子。引擎版本：2.3.2
‘use strict’;
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of this software and associated engine source code (the “Software”), a limited,
worldwide, royalty-free, non-assignable, revocable and non-exclusive license
to use Cocos Creator solely to develop games on your target platforms. You shall
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var fs = wx.getFileSystemManager ? wx.getFileSystemManager() : null;
function getUserDataPath() {
return wx.env.USER_DATA_PATH;
}
function checkFsValid() {
if (!fs) {
console.warn('can not get the file system!');
return new Error('file system does not exist!');
}
return null;
}
function deleteFile(filePath, callback) {
var result = checkFsValid();
if (result) return result;
fs.unlink({
filePath: filePath,
success: function success() {
cc.log('Removed local file ' + filePath + ' successfully!');
callback && callback(null);
},
fail: function fail(res) {
console.warn(res.errMsg);
callback && callback(new Error(res.errMsg));
}
});
}
function downloadFile(remoteUrl, filePath, callback, retryCount = 1) {
if (retryCount) {
console.warn("DownloadFile " + retryCount + " By:" + remoteUrl);
}
wx.downloadFile({
url: remoteUrl,
filePath: filePath,
success: function success(res) {
if (res.statusCode === 200) {
callback && callback(null, res.tempFilePath || res.filePath);
} else {
if (res.filePath) {
deleteFile(res.filePath);
}
console.warn("Download file failed: " + remoteUrl);
callback && callback(new Error(res.errMsg), null);
}
},
fail: function fail(res) {
downloadFile(remoteUrl, filePath, callback, retryCount + 1)
}
});
}
function saveFile(srcPath, destPath, callback) {
wx.saveFile({
tempFilePath: srcPath,
filePath: destPath,
success: function success(res) {
cc.log('save file finished:' + destPath);
callback && callback(null, res.savedFilePath);
},
fail: function fail(res) {
cc.log('save file failed:' + res.errMsg);
callback && callback(new Error(res.errMsg), null);
}
});
}
function copyFile(srcPath, destPath, callback) {
var result = checkFsValid();
if (result) return result;
fs.copyFile({
srcPath: srcPath,
destPath: destPath,
success: function success() {
cc.log('copy file finished:' + destPath);
callback && callback(null);
},
fail: function fail(res) {
cc.log('copy file failed:' + res.errMsg);
callback && callback(new Error(res.errMsg));
}
});
}
function writeFile(path, data, encoding, callback) {
var result = checkFsValid();
if (result) return result;
fs.writeFile({
filePath: path,
encoding: encoding,
data: data,
success: callback ? function () {
callback(null);
} : undefined,
fail: function fail(res) {
console.warn(res.errMsg);
callback && callback(new Error(res.errMsg));
}
});
}
function writeFileSync(path, data, encoding) {
var result = checkFsValid();
if (result) return result;
try {
fs.writeFileSync(path, data, encoding);
return null;
} catch (e) {
console.warn(e.message);
return new Error(e.message);
}
}
function readFile(filePath, encoding, callback) {
var result = checkFsValid();
if (result) return result;
fs.readFile({
filePath: filePath,
encoding: encoding,
success: callback ? function (res) {
callback(null, res.data);
} : undefined,
fail: function fail(res) {
console.warn(res.errMsg);
callback && callback(new Error(res.errMsg), null);
}
});
}
function readDir(filePath, callback) {
var result = checkFsValid();
if (result) {
return result;
}
fs.readdir({
dirPath: filePath,
success: callback ? function (res) {
callback(null, res.files);
} : undefined,
fail: callback ? function (res) {
callback(new Error(res.errMsg), null);
} : undefined
});
}
function readText(filePath, callback) {
return readFile(filePath, 'utf8', callback);
}
function readArrayBuffer(filePath, callback) {
return readFile(filePath, '', callback);
}
function readJsonSync(path) {
var result = checkFsValid();
if (result) return result;
try {
var str = fs.readFileSync(path, 'utf8');
return JSON.parse(str);
} catch (e) {
console.warn(e.message);
return new Error(e.message);
}
}
function makeDirSync(path, recursive) {
var result = checkFsValid();
if (result) return result;
try {
fs.mkdirSync(path, recursive);
return null;
} catch (e) {
console.warn(e.message);
return new Error(e.message);
}
}
function exists(filePath, callback) {
var result = checkFsValid();
if (result) return result;
fs.access({
path: filePath,
success: callback ? function () {
callback(true);
} : undefined,
fail: callback ? function () {
callback(false);
} : undefined
});
}
window.fsUtils = module.exports = { fs: fs, getUserDataPath: getUserDataPath, checkFsValid: checkFsValid, readDir: readDir, exists: exists, copyFile: copyFile, downloadFile: downloadFile, readText: readText, readArrayBuffer: readArrayBuffer, saveFile: saveFile, writeFile: writeFile, deleteFile: deleteFile, writeFileSync: writeFileSync, readJsonSync: readJsonSync, makeDirSync: makeDirSync };
以前我的做法时下载超时或者失败 就再次下载
如果确定有这个文件的话
可以考虑一下是否是单个资源太大了 超出了字节小游戏的限制呢
之前在弱网环境下测试过 确实很容易复现文件下载失败 和文件大小无关