AWS v2 SNS中的iOS -createPlatformEndpoint:请求

Question

当我在SNS控制台中设置端点时，推送工作。现在，我开始允许iOS应用程序创建端点。然后是订阅。

问题是BFTask *task = [sns createPlatformEndpoint:request];返回，task.result是零，而不是AWSSNSCreateEndpointResponse*。顺便说一下，task.error也是零。

来自.h文件：

• @返回BFTask的一个实例。在成功执行时，task.result将包含一个AWSSNSCreateEndpointResponse实例。执行失败时，task.error可能包含带有AWSSNSErrorDomain domian的NSError和以下错误代码: AWSSNSErrorInvalidParameter、AWSSNSErrorInternalError、AWSSNSErrorAuthorizationError、AWSSNSErrorNotFound。

亚马逊还在SDK v2中为SNS创建了示例。因此，我还想找一个可能有一些使用SDK v2创建端点和订阅的例子的人。

应用程序启动后，我从以下位置调用我的方法：

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
    [self awsStartWithDeviceToken:deviceToken];
} 

守则：

- (void)awsStartWithDeviceToken:(NSData *)deviceToken {

    // Get a hex string for the NSData deviceToken
    // http://stackoverflow.com/questions/7520615/how-to-convert-an-nsdata-into-an-nsstring-hex-string
    NSUInteger dataLength = [deviceToken length];
    NSMutableString *deviceTokenString = [NSMutableString stringWithCapacity:dataLength*2];
    const unsigned char *dataBytes = [deviceToken bytes];
    for (NSInteger idx = 0; idx < dataLength; ++idx) {
        [deviceTokenString appendFormat:@"%02x", dataBytes[idx]];
    }

    // Set the log level
    [AWSLogger defaultLogger].logLevel = AWSLogLevelVerbose;

    // Login
    AWSStaticCredentialsProvider *credentialsProvider = [AWSStaticCredentialsProvider credentialsWithAccessKey:AWS_ACCESSKEY secretKey:AWS_SECRETKEY];
    AWSServiceConfiguration *configuration = [AWSServiceConfiguration configurationWithRegion:AWS_REGION credentialsProvider:credentialsProvider];
    [AWSServiceManager defaultServiceManager].defaultServiceConfiguration = configuration;

    // Create SNS Client
    //AWSSNS *sns = [[AWSSNS new] initWithConfiguration:configuration];
    AWSSNS *sns = [AWSSNS defaultSNS];

    // Create an Application Endpoint
    AWSSNSCreatePlatformEndpointInput *request = [AWSSNSCreatePlatformEndpointInput new];
    request.token = deviceTokenString;
    request.platformApplicationArn = AWS_APP_ARN;
    request.customUserData = [NSString stringWithFormat:@"Operation:%@ Alias:%@ Name:%@ Model:%@ (%@:%@)",
                            [self getOperation], [self getNotifyAlias], [UIDevice currentDevice].name, [UIDevice currentDevice].model,
                            [UIDevice currentDevice].systemName, [UIDevice currentDevice].systemVersion] ;
    BFTask *task = [sns createPlatformEndpoint:request];
}

以下是任务描述：

• task.result = (id) 0.0
• task.error = (NSError *)零

下面是详细的日志记录输出：

2014-08-30 19:04:15.346 iFlightBag[4080:2492646] AWSiOSSDKv2 [Verbose] AWSURLRequestSerialization.m line:462 | -[AWSQueryStringRequestSerializer serializeRequest:headers:parameters:] | Request body: [Action=CreatePlatformEndpoint&Token=0b96783052a5114772ddc9154439849bbff9a6ba364cc3a69bf0524576a7697a&Version=2010-03-31&CustomUserData=Operation%3A%20Alias%3AAirCertChartersBI_%20Name%3ANikko%20Model%3AiPad%20%28iPhone%20OS%3A8.0%29&PlatformApplicationArn=arn%3Aaws%3Asns%3Aus-west-2%3A245211809793%3Aapp%2FAPNS_SANDBOX%2FLevelFlightMobile-Dev]
2014-08-30 19:04:15.364 iFlightBag[4080:2492646] AWSiOSSDKv2 [Debug] AWSSignature.m line:307 | -[AWSSignatureV4Signer signRequestV4:] | AWS4 Canonical Request: [POST
/

 content-type:application/x-www-form-urlencoded; charset=utf-8
 host:sns.us-west-2.amazonaws.com
 user-agent:aws-sdk-iOS/2.0.6 iPhone-OS/8.0 en_US
 x-amz-date:20140831T020415Z

 content-type;host;user-agent;x-amz-date
 76b8df9e95aaea3610c4a67073a0cbe48a941e41507cd55462f6bca2e47134b3]
2014-08-30 19:04:15.365 iFlightBag[4080:2492646] AWSiOSSDKv2 [Debug] AWSSignature.m line:308 | -[AWSSignatureV4Signer signRequestV4:] | payload Action=CreatePlatformEndpoint&Token=0b96783052a5114772ddc9154439849bbff9a6ba364cc3a69bf0524576a7697a&Version=2010-03-31&CustomUserData=Operation%3A%20Alias%3AAirCertChartersBI_%20Name%3ANikko%20Model%3AiPad%20%28iPhone%20OS%3A8.0%29&PlatformApplicationArn=arn%3Aaws%3Asns%3Aus-west-2%3A245211809793%3Aapp%2FAPNS_SANDBOX%2FLevelFlightMobile-Dev
2014-08-30 19:04:15.367 iFlightBag[4080:2492646] AWSiOSSDKv2 [Debug] AWSSignature.m line:324 | -[AWSSignatureV4Signer signRequestV4:] | AWS4 String to Sign: [AWS4-HMAC-SHA256
 20140831T020415Z
 20140831/us-west-2/sns/aws4_request
 e60736ba7af965e80d99ccf2cab6298ffddb79de719f317901a0c29ed5cd33c8]

没有错误返回，我不知道出了什么错.想法？

**更新以使用异步完成块**

    // Async call to create the platform endpoint
    [[[sns createPlatformEndpoint:request] continueWithSuccessBlock:^id(BFTask *task) {
        // success
        [self awsCreateTopicsAndSubscriptionsForEndpoint:task.result];
        return nil;
    }] continueWithBlock:^id(BFTask *task) {
        // failed
        if (task.error) {
            NSLog(@"Error: %@", task.error);
        }
        return nil;
    }];
}

Answer 1

createPlatformEndpoint:是一种异步方法。为了检索continueWithBlock:或task.error，需要对BFTask实例调用task.result。这个博客帖子应该可以帮助您理解如何使用BFTask。