AFNetworking - 如何發出POST請求

Question

編輯07/14

正如比爾·伯吉斯在評論中提到的那樣，這個問題與AFNetworking version 1.3有關。 這里的新人可能已經過時了。

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我對iPhone開發很新，我使用AFNetworking作為我的服務庫。

我正在查詢的API是RESTful的，我需要發出POST請求。 為此，我嘗試使用以下代碼：

NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:@"my_username", @"username", @"my_password", @"password", nil];
NSURL *url = [NSURL URLWithString:@"http://localhost:8080/login"];

NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
    NSLog(@"Pass Response = %@", JSON);
} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
    NSLog(@"Failed Response : %@", JSON);
}];
[operation start];

此代碼有兩個主要問題：

• AFJSONRequestOperation似乎發出了GET請求，而不是POST請求。
• 我不能把參數放到這個方法。

我也嘗試過這段代碼：

NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:@"my_username", @"username", @"my_password", @"password", nil];
NSURL *url = [NSURL URLWithString:@"http://localhost:8080"];
AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];

[httpClient postPath:@"/login" parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"Succes : %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Failure : %@", error);
}];

有沒有更好的方法來制作我想要的東西來完成它？

謝謝您的幫助 ！

Answer 1

您可以覆蓋與AFNetworking一起使用的請求的默認行為，以便作為POST進行處理。

NSURLRequest *request = [client requestWithMethod:@"POST" path:path parameters:nil];

這假設您已覆蓋默認的AFNetworking設置以使用自定義客戶端。 如果你不是，我會建議你這樣做。 只需創建一個自定義類來為您處理網絡客戶端。

MyAPIClient.h

#import <Foundation/Foundation.h>
#import "AFHTTPClient.h"

@interface MyAPIClient : AFHTTPClient

+(MyAPIClient *)sharedClient;

@end

MyAPIClient.m

@implementation MyAPIClient

+(MyAPIClient *)sharedClient {
    static MyAPIClient *_sharedClient = nil;
    static dispatch_once_t oncePredicate;
    dispatch_once(&oncePredicate, ^{
        _sharedClient = [[self alloc] initWithBaseURL:[NSURL URLWithString:webAddress]];
    });
    return _sharedClient;
}

-(id)initWithBaseURL:(NSURL *)url {
    self = [super initWithBaseURL:url];
    if (!self) {
        return nil;
    }
    [self registerHTTPOperationClass:[AFJSONRequestOperation class]];
    [self setDefaultHeader:@"Accept" value:@"application/json"];
    self.parameterEncoding = AFJSONParameterEncoding;

    return self;

}

然后，您應該可以在操作隊列上啟動網絡調用，沒有任何問題。

    MyAPIClient *client = [MyAPIClient sharedClient];
    [[AFNetworkActivityIndicatorManager sharedManager] setEnabled:YES];
    [[AFNetworkActivityIndicatorManager sharedManager] incrementActivityCount];

    NSString *path = [NSString stringWithFormat:@"myapipath/?value=%@", value];
    NSURLRequest *request = [client requestWithMethod:@"POST" path:path parameters:nil];

    AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
        // code for successful return goes here
        [[AFNetworkActivityIndicatorManager sharedManager] decrementActivityCount];

        // do something with return data
    }failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
        // code for failed request goes here
        [[AFNetworkActivityIndicatorManager sharedManager] decrementActivityCount];

        // do something on failure
    }];

    [operation start];