//获取设备号:
    
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    NSString *urlStr = @"http://distribution.dev.juntest.com/web/index/wawajiTest?device_id=xxxxx";

    manager.requestSerializer = [AFHTTPRequestSerializer serializer];
//    manager.requestSerializer = [AFJSONRequestSerializer serializer];

//    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    manager.responseSerializer = [AFJSONResponseSerializer serializer];
    
    NSString *userAgent = [manager.requestSerializer  valueForHTTPHeaderField:@"User-Agent"];
    userAgent = [userAgent stringByAppendingPathComponent:@"CUSTOM_PART"];
    [manager.requestSerializer setValue:userAgent forHTTPHeaderField:@"User-Agent"];
    
    manager.responseSerializer.acceptableContentTypes  = [NSSet setWithObjects:@"application/json", @"text/html",@"text/json",@"text/javascript",@"*/*", nil];
    
    [manager POST:urlStr parameters:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nonnull responseObject) {
        
        NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseObject options:(NSJSONReadingMutableLeaves) error:nil];
        
        NSLog(@"%@", dict);
        
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        NSLog(@"%@", error);
    }];

其他电脑版本的User-Agent

[manager.requestSerializer setValue:@"Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)" forHTTPHeaderField:@"User-Agent"];



IE8 on Windows 7
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)

64-bit IE on 64-bit Windows 7:
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Win64; x64; Trident/4.0)

32-bit IE on 64-bit Windows 7:
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0)