在初始化 AFHTTPClient 的共享实例后，我有一个 setReachabilityStatusChangeBlock 代码块，然后我有一个 enqueueBatchOfHTTPRequestOperations。问题是 setReachabilityStatusChangeBlock 永远不会被执行，我试图捕捉可能危及 enqueueBatchOfHTTPRequestOperations 中下载的任何文件的不良网络连接。
对此的任何帮助将不胜感激。
这是我所拥有的一个例子......
////////////////////////
// Start the operations in the download client
////////////////////////
AFHTTPClient *client = [EMEDownloadClient sharedClient];
// Workaround if network connection is poor
[client setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
NSLog(@"%d", status);
if ( status == AFNetworkReachabilityStatusNotReachable ) {
NSLog(@"Reachability Changed : disconnected");
// update status for download
[dq statusDownload:@"removed"];
// remove assetId from the downloadQueue
[dq resetDownloadQueue];
dispatch_async(dispatch_get_main_queue(), ^{
[SVProgressHUD showErrorWithStatus:
@"There is no network connection, please try again!"];
});
}
else if ( status == AFNetworkReachabilityStatusUnknown ) {
NSLog(@"Reachability Changed : unknown");
// update status for download
[dq statusDownload:@"removed"];
// remove assetId from the downloadQueue
[dq resetDownloadQueue];
dispatch_async(dispatch_get_main_queue(), ^{
[SVProgressHUD showErrorWithStatus:
@"Poor internet connection, please try again from a better \n"
"location."];
});
}
else {
NSLog(@"Reachability Changed : connected");
}
}];
[client enqueueBatchOfHTTPRequestOperations:requestsForDownload
progressBlock:^(NSUInteger numberOfFinishedOperations,
NSUInteger totalNumberOfOperations) {
NSLog(@"%d / %d", numberOfFinishedOperations, totalNumberOfOperations);
dispatch_async(dispatch_get_main_queue(), ^{
[SVProgressHUD showWithStatus:[NSString
stringWithFormat:@"Downloading... %d / %d. This process \n"
"may take a few minutes for assets with multiple playback \n"
"components.",
numberOfFinishedOperations,
totalNumberOfOperations]
maskType:SVProgressHUDMaskTypeGradient];
});
} completionBlock:^(NSArray *operations) {
int i = 0;
for (AFHTTPRequestOperation *ro in operations) {
NSLog(@"Operation statusCode: %ld", (long)[ro.response statusCode]);
if ((long)[ro.response statusCode] != 200 ) {
i++;
}
}
if ( i == 0 ) {
////////////////////////
// Save the managedObjectContext
////////////////////////
NSError *error = nil;
if ([context save:&error]) {
// Sucess!!
// NSLog(@"%s", __PRETTY_FUNCTION__);
NSLog(@"context used in downloading has been saved");
// update status for download
[dq statusDownload:@"downloaded"];
// remove assetId from the downloadQueue
[dq resetDownloadQueue];
dispatch_async(dispatch_get_main_queue(), ^{
[SVProgressHUD showSuccessWithStatus:@"Download Completed"];
});
if (autoplay) {
if ([section isEqualToString:@"generalLibrary"]) {
// autoplay downloaded asset
[[NSNotificationCenter defaultCenter]
postNotificationName:kECHONotificationDownloadAssetDidSucceedAutoplayGeneral
object:self
userInfo: @{ @"assetID": assetID }];
} else if ([section isEqualToString:@"collectionLibrary"]) {
// autoplay downloaded asset
[[NSNotificationCenter defaultCenter] postNotificationName:kECHO
object:self
userInfo: @{ @"assetID": assetID }];
} else if ([section isEqualToString:@"detailView"]) {
// autoplay downloaded asset
[[NSNotificationCenter defaultCenter]
postNotificationName:kECHONotificationDownloadAssetDidSucceedAutoplayDetail
object:self
userInfo: @{ @"assetID": assetID }];
}
}
} else {
NSLog(@"ERROR: %@ %@", [error localizedDescription],
[error userInfo]);
exit(1);
}
} else {
// something went wrong with the download, try again
// update status for download
[dq statusDownload:@"removed"];
// remove assetId from the downloadQueue
[dq resetDownloadQueue];
dispatch_async(dispatch_get_main_queue(), ^{
[SVProgressHUD showErrorWithStatus:@"Something went wrong, \n"
"please try again!"];
});
}
}];