您好我是Ios的新手，在我的应用中，我希望使用 BackGround Thread 运行我的Web服务，即使应用于Background State，我也希望运行此Web服务。
我该如何做这个场景？有谁可以帮助我吗？
我的代码如下。
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[self getServieCalling:@"MY URL"];
}
-(void)getServieCalling :(NSString*)mainurl{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:mainurl,kServerBaseURL1]]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request setHTTPMethod:@"GET"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
NSURLSessionTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error != nil) {
NSString * BasicnetworkError = [error localizedDescription];
NSString * AppendString = @"Http Response failed with the following ";
NSString * networkError = [AppendString stringByAppendingString:BasicnetworkError];
[self BasicError:networkError];
return;
}
else if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
NSInteger statusCode = [(NSHTTPURLResponse *)response statusCode];
if (statusCode != 200) {
NSString *statusCodeError = [NSString stringWithFormat: @"Http Response failed with the following code %ld", (long)statusCode];
}else{
NSError *parseError;
id responseObject = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];
NSLog(@"response object %@",responseObject);
else {
NSLog(@"Error parsing JSON: %@", parseError);
NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"responseString = %@", responseString);
}
}
}
}];
[task resume];
});
}