Using AFNetworking and HTTP Basic Authentication

Question

以下代码成功连接到我的Ruby on Rails API，并使用AFNetworking返回JSON。我需要做什么来编辑它以传入用户名和密码，以便我的 API 可以使用 HTTP 基本身份验证？

我已经阅读了他们的文档，但我是Objective-C和AFNetworking的新手，目前没有意义。

NSURL *url = [[NSURL alloc] initWithString:@"http://localhost:3000/tasks.json"];
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url];
AFJSONRequestOperation *operation = [AFJSONRequestOperation
                                     JSONRequestOperationWithRequest:request
                                     success:^(NSURLRequest *request
                                     , NSHTTPURLResponse *response
                                     , id JSON) {
    self.tasks = [JSON objectForKey:@"results"];
    [self.activityIndicatorView stopAnimating];
    [self.tableView setHidden:NO];
    [self.tableView reloadData];
    NSLog(@"JSON");
} failure:^(NSURLRequest *request
                , NSHTTPURLResponse *response
                , NSError *error
                , id JSON) {
    NSLog(@"Request Failed with Error: %@, %@", error, error.userInfo);
}];
[operation start];

Answer 1

针对 AFNetworking 2.x 更新了答案

对于AFNetworking 2.x：

在 2.x 中，他们取消了 AFHTTPClient，因此您需要使用自己的类扩展 AFHTTPRequestOperationManager。然后，可以从其他代码调用该类。例如，下面是一个扩展 AFHTTPRequestOperationManager 的示例类：

SBAPIManager.h：

#import "AFHTTPRequestOperationManager.h"
@interface SBAPIManager : AFHTTPRequestOperationManager
- (void)setUsername:(NSString *)username andPassword:(NSString *)password;
+ (SBAPIManager *)sharedManager;
@end

SBAPIManager.m：

#import "SBAPIManager.h"
#import "AFNetworkActivityIndicatorManager.h"
@implementation SBAPIManager
#pragma mark - Methods
- (void)setUsername:(NSString *)username andPassword:(NSString *)password
{
    [self.requestSerializer clearAuthorizationHeader];
    [self.requestSerializer setAuthorizationHeaderFieldWithUsername:username password:password];
}
#pragma mark - Initialization
- (id)initWithBaseURL:(NSURL *)url
{
    self = [super initWithBaseURL:url];
    if(!self)
        return nil;
    self.requestSerializer = [AFJSONRequestSerializer serializer];
    [[AFNetworkActivityIndicatorManager sharedManager] setEnabled:YES];
    return self;
}
#pragma mark - Singleton Methods
+ (SBAPIManager *)sharedManager
{
    static dispatch_once_t pred;
    static SBAPIManager *_sharedManager = nil;
    dispatch_once(&pred, ^{ _sharedManager = [[self alloc] initWithBaseURL:[NSURL URLWithString:@"http://localhost:3000"]]; }); // You should probably make this a constant somewhere
    return _sharedManager;
}
@end

然后，在代码中，可以像这样调用它：

[[SBAPIManager sharedManager] setUsername:yourUsernameVariableHere andPassword:yourPasswordVariableHere];
[[SBAPIManager sharedManager] GET:@"/tasks.json" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
    self.tasks = [responseObject objectForKey:@"results"];
    [self.activityIndicatorView stopAnimating];
    [self.tableView setHidden:NO];
    [self.tableView reloadData];
    NSLog(@"JSON");
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    // error stuff here
}];

---

对于AFNetworking 1.x：

在AFNetworking中，最好的做法是用你自己的类扩展AFHTTPClient。然后，可以从其他代码调用该类。例如，下面是一个扩展 AFHTTPClient 的示例类：

SBAPIManager.h：

#import "AFNetworking/AFHTTPClient.h"
@interface SBAPIManager : AFHTTPClient
- (void)setUsername:(NSString *)username andPassword:(NSString *)password;
+ (SBAPIManager *)sharedManager;
@end

SBAPIManager.m：

#import "SBAPIManager.h"
#import "AFJSONRequestOperation.h"
#import "AFNetworkActivityIndicatorManager.h"
@implementation SBAPIManager
#pragma mark - Methods
- (void)setUsername:(NSString *)username andPassword:(NSString *)password
{
    [self clearAuthorizationHeader];    
    [self setAuthorizationHeaderWithUsername:username password:password];
}
#pragma mark - Initialization
- (id)initWithBaseURL:(NSURL *)url
{
    self = [super initWithBaseURL:url];
    if(!self)
        return nil;
    [self registerHTTPOperationClass:[AFJSONRequestOperation class]];
    [self setDefaultHeader:@"Accept" value:@"application/json"];
    [self setParameterEncoding:AFJSONParameterEncoding];
    [[AFNetworkActivityIndicatorManager sharedManager] setEnabled:YES];
    return self;
}
#pragma mark - Singleton Methods
+ (SBAPIManager *)sharedManager
{
    static dispatch_once_t pred;
    static SBAPIManager *_sharedManager = nil;
    dispatch_once(&pred, ^{ _sharedManager = [[self alloc] initWithBaseURL:[NSURL URLWithString:@"http://localhost:3000"]]; }); // You should probably make this a constant somewhere
    return _sharedManager;
}
@end

然后，在代码中，可以像这样调用它：

[[SBAPIManager sharedManager] setUsername:yourUsernameVariableHere andPassword:yourPasswordVariableHere];
[[SBAPIManager sharedManager] getPath:@"/tasks.json" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
    self.tasks = [responseObject objectForKey:@"results"];
    [self.activityIndicatorView stopAnimating];
    [self.tableView setHidden:NO];
    [self.tableView reloadData];
    NSLog(@"JSON");
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    // error stuff here
}];