我正在以这种方式进行“批量操作”，并且效果很好
NSMutableArray *mutableOperations = [NSMutableArray array];
for (NSString *stringURL in url_list) {
NSURL *url = [NSURL URLWithString:stringURL];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
operation.responseSerializer = [AFHTTPResponseSerializer serializer];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
[self addDataToTotal:[self parseJSONfile:responseObject]];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Error: %@", error);
}];
[mutableOperations addObject:operation];
}
NSArray *operations = [AFURLConnectionOperation batchOfRequestOperations:mutableOperations progressBlock:^(NSUInteger numberOfFinishedOperations, NSUInteger totalNumberOfOperations) {
NSLog(@"progress:%f", (float)numberOfFinishedOperations / totalNumberOfOperations);
} completionBlock:^(NSArray *operations) {
NSLog(@"All operations in batch complete");
[self startPopulateDBStructure:self.total];
}];
[[NSOperationQueue mainQueue] addOperations:operations waitUntilFinished:NO];
现在，我想使用“可达性属性”来检查连接状态，然后执行此操作
[[[NSOperationQueue mainQueue]reachabilityManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
switch (status) {
case AFNetworkReachabilityStatusReachableViaWWAN:
case AFNetworkReachabilityStatusReachableViaWiFi:
[[NSOperationQueue mainQueue] setSuspended:NO];
break;
case AFNetworkReachabilityStatusNotReachable:
default:
[[NSOperationQueue mainQueue] setSuspended:YES];
break;
}
}];
但我收到此消息后崩溃，问题出在哪里？
[NSOperationQueue reachabilityManager]: unrecognized selector sent to instance
最佳答案
您正在尝试从主reachabilityManager中获取它，而该主NSOperationQueue没有它。您应该使用[AFNetworkReachabilityManager sharedManager]来获取reachabilityManager实例。
所以：
[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) { ...
另外，请考虑尝试挂起主队列的逻辑。您可能想做的是从
operationQueue实例获取AFHTTPRequestOperationManager并将其挂起...