Question

在负责网络的单身人士中，我创建了一个驱动服务实例：

self.service = [[GTLServiceDrive alloc] init];
[self.service setShouldFetchInBackground:YES];

在某些时候，我创建了一张上传给定文件的票证：

GTLUploadParameters *uploadParameters = [GTLUploadParameters uploadParametersWithFileHandle:fileHandle MIMEType:kGDriveMimeType];
GTLDriveFile *newFile = [GTLDriveFile object];
newFile.title = @"123";

// keep the file inside event folder
GTLDriveParentReference *parentFolder = [GTLDriveParentReference object];
parentFolder.identifier = parentFolderId;
newFile.parents = @[parentFolder];

GTLQueryDrive *uploadQuery = [GTLQueryDrive queryForFilesInsertWithObject:newFile uploadParameters:uploadParameters];

GTLServiceTicket *serviceTicket = [self.service executeQuery:uploadQuery completionHandler:^(GTLServiceTicket *ticket, GTLDriveFile *uploadedFile, NSError *uploadError) {
    if (completionHandler) {
        completionHandler(uploadedFile, uploadError);
    }
}];

[serviceTicket setUploadProgressBlock:^(GTLServiceTicket *ticket, unsigned long long numberOfBytesRead, unsigned long long dataLength) {
    CGFloat progress = (CGFloat)numberOfBytesRead / (CGFloat)dataLength;
    if (progressHandler) {
        progressHandler(progress);
    }
}];

整个问题是，当我使用GTMHTTPFetcher下载数据时，后台的工作仍在继续。使用GTLServiceTicket上传时，应用在后台会暂停。我找不到任何属性让它在后台工作。我错过了什么吗？怎么做？

Answer 1

我没有找到GTLServiceTicket的任何合适的解决方案，所以我已经完成了自定义包装器，它正在收听UIApplicationDidEnterBackgroundNotification并使用beginBackgroundTaskWithName:expirationHandler:。

继续在后台使用GTLServiceTicket上传

1 个答案: