Question

我正在尝试将应用内购买功能添加到我的应用中，并且我想下载我在自己的服务器中托管的内容。 RMStore提供了一个API来执行此操作，但我无法弄清楚如何执行此操作。

文档说：

RMStore委托通过以下方式下载自托管内容可选的contentDownloader代表。你可以提供自己的使用RMStoreContentDownloader协议实现：

- (void)downloadContentForTransaction:(SKPaymentTransaction*)transaction
                              success:(void (^)())successBlock
                             progress:(void (^)(float progress))progressBlock
                              failure:(void (^)(NSError *error))failureBlock;

如果下载成功，请致电successBlock，如果是failureBlock则致电{1}} isn＆t;和progressBlock通知下载进度。 RMStore会考虑到交易在完成或失败之后才会完成内容下载程序委托已成功或失败下载了它的内容。

以下是协议（来自RMStore.h）：

@protocol RMStoreContentDownloader <NSObject>

/**
 Downloads the self-hosted content associated to the given transaction and calls the given success or failure block accordingly. Can also call the given progress block to notify progress.
 @param transaction The transaction whose associated content will be downloaded.
 @param successBlock Called if the download was successful. Must be called in the main queue.
 @param progressBlock Called to notify progress. Provides a number between 0.0 and 1.0, inclusive, where 0.0 means no data has been downloaded and 1.0 means all the data has been downloaded. Must be called in the main queue.
 @param failureBlock Called if the download failed. Must be called in the main queue.
 @discussion Hosted content from Apple’s server (@c SKDownload) is handled automatically by RMStore.
 */
- (void)downloadContentForTransaction:(SKPaymentTransaction*)transaction
                              success:(void (^)())successBlock
                             progress:(void (^)(float progress))progressBlock
                              failure:(void (^)(NSError *error))failureBlock;

@end

简单地说，下载与给定交易相关联的自托管内容。如何将自托管与交易相关联？

Answer 1

这就是我的所作所为。显然，您需要在运行此方法的类中添加RMStore.h和协议RMStoreContentDownloader。它有效，虽然我不明白如何管理progressBlock（也许我的下载太短了？）......

- (void)downloadContentForTransaction:(SKPaymentTransaction*)transaction
                          success:(void (^)())successBlock
                         progress:(void (^)(float progress))progressBlock
                          failure:(void (^)(NSError *error))failureBlock
{
    //the product purchased
    NSString *productID = transaction.payment.productIdentifier;


    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
    AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];

    //HERE IS WHERE TO INSERT THE URL
    NSURL *URL = [NSURL URLWithString:@"http://example.com/download.zip"];
    NSURLRequest *request = [NSURLRequest requestWithURL:URL];

    NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
    NSURL *documentsDirectoryURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];
    return [documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]];
    } completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
    if (error == nil)
        NSLog(@"File downloaded to: %@", filePath);
        successBlock();
    else
        NSLog(@"Error in download: %@", error.localizedDescription);
        failureBlock();
    }];
    [downloadTask resume];
    [manager setDownloadTaskDidWriteDataBlock:^(NSURLSession *session,    NSURLSessionDownloadTask *downloadTask, int64_t bytesWritten, int64_t totalBytesWritten, int64_t totalBytesExpectedToWrite)
    {
        float percentDone = (((float)((int)totalBytesWritten) / (float)((int)totalBytesExpectedToWrite))*100);
        progressBlock(percentDone);
    }];

}

然后RMStore在适当的时候调用该方法！

希望它有所帮助！

Answer 2

您尝试通过应用内购买提供的内容是否对每笔交易都是唯一的？如果它对每个事务都是唯一的，则应将事务ID传递给服务器并下载仅为此事务ID生成的内容。否则，为每个事务下载内容而不传递事务id。对于这两种情况，您应该在下载过程结束时调用successBlock或failureBlock。（可选）您可以在每次要更新进度时调用progressBlock。

如何将自托管内容与事务相关联？

2 个答案: