我正在使用AFURLSessionManager,并将管理器设置为单例实例.
- (AFURLSessionManager *)backgroundSession
{
static AFURLSessionManager *backgroundSession = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
NSURLSessionConfiguration *config = [NSURLSessionConfiguration backgroundSessionConfiguration:@"com.testBackground.BackgroundDownload.BackgroundSession1234"];
backgroundSession = [[AFURLSessionManager alloc]initWithSessionConfiguration:config];
[backgroundSession setDownloadTaskDidWriteDataBlock:^(NSURLSession *session, NSURLSessionDownloadTask *downloadTask, int64_t bytesWritten, int64_t totalBytesWritten, int64_t totalBytesExpectedToWrite){
NSLog(@"i am downloading my id = %d progress= %f",downloadTask.taskIdentifier, totalBytesWritten*1.0/totalBytesExpectedToWrite);
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
}];
[backgroundSession setDownloadTaskDidFinishDownloadingBlock:^NSURL *(NSURLSession *session, NSURLSessionDownloadTask *downloadTask, NSURL *location){
NSLog(@"download finished");
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
return location;
}];
});
return backgroundSession;
}
//assign a download task
NSURLSessionDownloadTask *task = [manager1 downloadTaskWithRequest:request …