关于导入图片的使用权限和问题

const photoSelectOptions = new picker.PhotoSelectOptions(); 
photoSelectOptions.MIMEType = picker.PhotoViewMIMETypes.IMAGE_TYPE; // 过滤选择媒体文件类型为IMAGE 
photoSelectOptions.maxSelectNumber = 5; // 选择媒体文件的最大数目 
let uris: Array<string> = []; 
const photoViewPicker = new picker.PhotoViewPicker(); 
await photoViewPicker.select(photoSelectOptions).then((photoSelectResult: picker.PhotoSelectResult) => { 
uris = photoSelectResult.photoUris; 
console.info(‘photoViewPicker.select to file succeed and uris are:’ + uris); 
}).catch((err: BusinessError) => { 
console.error(Invoke photoViewPicker.select failed, code is ${err.code}, message is ${err.message}); 
}) 
let uri: string = uris[0]; 
let file = fs.openSync(uri, fs.OpenMode.READ_ONLY); 
console.info('file fd: ’ + file.fd); 
let fd =file.fd 
let filesDir = getContext(this).filesDir; 
fs.copyFileSync(fd, filesDir + “/test2.jpg”) 
let file2 = fs.openSync(filesDir + “/test2.jpg”, fs.OpenMode.READ_ONLY ); 
let file3 = fs.openSync(filesDir + “/test3.jpg”, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE); 
ReadFile(file2.fd,file3.fd) 
native操作如下，将沙箱目录的test2复制到test3： 
static napi_value ReadFile(napi_env env, napi_callback_info info) { 
size_t argc = 2; 
napi_value args[2] = {nullptr}; 
 
napi_get_cb_info(env, info, &argc, args, nullptr, nullptr); 
 
unsigned int fd = -1; 
napi_get_value_uint32(env, args[0], &fd); 
 
unsigned int fd2 = -1; 
napi_get_value_uint32(env, args[1], &fd2); 
 
OpenFile(fd, fd2); 
 
return nullptr; 
} 
 
static napi_value OpenFile(unsigned int fd,unsigned int fd2) { 
OH_LOG_INFO(LOG_APP, “OpenFile”); 
 
if (fd != -1) { 
    char buffer[4096]; 
    ssize_t bytesRead; 
 
    // 读取文件内容到缓冲区中 
    bytesRead = read(fd, buffer, sizeof(buffer)); 
    if (bytesRead == -1) { 
        OH_LOG_INFO(LOG_APP, "读取文件失败"); 
        close(fd); // 关闭文件描述符 
        return nullptr; 
    } 
while (bytesRead != 0) { 
        OH_LOG_INFO(LOG_APP, "读取文件大小 %{public}lu", bytesRead); 
        OH_LOG_INFO(LOG_APP, "读取文件cg"); 
        char *pData1 = buffer; 
        OH_LOG_INFO(LOG_APP, "文件内容: \n%{public}s", pData1); 
 
        ssize_t bytesWrite; 
        bytesWrite = write(fd2, pData1, bytesRead); 
        if (bytesWrite == -1) { 
            OH_LOG_INFO(LOG_APP, "写文件失败"); 
            close(fd2); // 关闭文件描述符 
            return nullptr; 
        } 
bytesRead = read(fd, buffer, sizeof(buffer)); 
} 
 
// 关闭文件描述符 
close(fd); 
close(fd2); // 关闭文件描述符 
} 
return nullptr; 
}
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