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iOS7中多任务处理:静音推送、后台fetch、后台下载
Thank you for the example.
If you start downloading and then kill the application process calls method stopDownloadWithTaskIdentifier, but resumeData always empty.
Why?
- (void) stopDownloadWithTaskIdentifier:(NSUInteger)taskIdentifier
{
KDownloadInfo *di = [self.downloadInfoDictionary objectForKey:kDownloadInfoKey(taskIdentifier)];
if (di && di.downloadTask) {
[di.downloadTask cancelByProducingResumeData:^(NSData *resumeData) {
NSLog(@"RESUME DATA %@", resumeData);
if (resumeData) {
di.resumeData = resumeData;
}
}];
}
}
Console log:
2013-11-11 20:12:27.975 iOS7_Multitasking[50682:130f] RESUME DATA (null)
2013-11-11 20:12:27.976 iOS7_Multitasking[50682:130f] RESUME DATA (null)
backgroundSessionConfiguration 下的 downloadTask 可以实现后台下载 但是杀掉进程 无法恢复下载?
请问有什么好方案?
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