我正在开发一个聊天应用程序，我可以在其中传输视频/音频/图像等媒体。
当使用下面的代码片段完成传输时，在 Wifi 上传输很流畅，但在移动到 3G 网络时非常慢。
另一个问题是当我进入后台时，AWS SDK 暂停传输并在我进入前台时恢复。
1) 我尝试更改 AWS 区域时如何才能快速进行传输，但仍然没有成功。2) 与使用的 AWS S3 传输管理器相比，还使用 S3Background 传输示例，但是当我按下主页按钮时下载暂停。
下面是我截取的代码。
//上传函数
AWSS3TransferManager *transferManager = [AWSS3TransferManager defaultS3TransferManager];
AWSS3TransferManagerUploadRequest *uploadRequest = [AWSS3TransferManagerUploadRequest new];
uploadRequest.bucket = S3BucketName;
User *userMO = .....my user details
NSString *fileName = [[filePath componentsSeparatedByString:@"/"] lastObject];
uploadRequest.key = [userMO.user_pool_id stringByAppendingPathComponent:fileName];
NSURL *uploadFileURL = [NSURL fileURLWithPath:filePath];
uploadRequest.body = uploadFileURL;
uploadRequest.expires = [NSDate dateWithTimeIntervalSinceNow:3600];
NSString *fileContentTypeStr = @"image/jpg";
if ([FileManager isVideoFile:fileName]) {
// fileContentTypeStr = [NSString stringWithFormat:@"video/%@",[[fileName pathExtension] lowercaseString]];
fileContentTypeStr = [NSString stringWithFormat:@"video/quicktime"];
}
else if ([FileManager isImageFile:fileName]) {
fileContentTypeStr = [NSString stringWithFormat:@"image/%@",[[fileName pathExtension] lowercaseString]];
}
else if ([FileManager isAudioFile:fileName]) {
fileContentTypeStr = [NSString stringWithFormat:@"audio/%@",[[fileName pathExtension] lowercaseString]];
}
uploadRequest.contentType = fileContentTypeStr;
[[transferManager upload:uploadRequest] continueWithBlock:^id(AWSTask *task) {
if (task.error) {
if ([task.error.domain isEqualToString:AWSS3TransferManagerErrorDomain]) {
switch (task.error.code) {
case AWSS3TransferManagerErrorCancelled:
{
//updating ui to notify cancel
}
break;
case AWSS3TransferManagerErrorPaused:
{
//updating ui to notify paused
}
break;
default:
{
NSLog(@"Upload task failed: %@",[task.error localizedDescription]);
//updating ui to notify failed
}
break;
}
} else {
NSLog(@"Upload task failed: %@",[task.error localizedDescription]);
//updating ui to notify failed
}
}
if (task.result)
{
//updating ui to notify finished
}
return nil;
}];
if(uploadRequest.state == AWSS3TransferManagerRequestStateRunning)
{
//updating ui to notify progress
}
//Add the request to the current upload cache handler entry as handle
任何机构都有任何建议并面临类似的问题。