iphone - 应用内购买响应永远不会到来

Question

在我的 iPhone 应用中，我设置了应用内购买。我开始这样的请求:

SKProductsRequest *request= [[SKProductsRequest alloc] initWithProductIdentifiers: [NSSet setWithObject: @"com.nicknoble.tiprounder.upgrade"]];
request.delegate = self;
[request start];

我使用这种方法来获得响应:

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response
{   
    NSLog(@"response recieved");
}

而这个捕捉错误:

-(void)request:(SKRequest *)request didFailWithError:(NSError *)error
{
    NSLog(@"%@",error.description);
}

但两者都没有被调用。我的项目没有警告或错误，我正在我的设备(iPhone)上运行它。有什么建议么？

编辑:

所以它适用于我的窗口的 Root View Controller ，但不适用于我目前的模态视图 Controller 。这是我的主视图 Controller 的代码:

TestViewController *testView = [[TestViewController alloc] initWithNibName:@"TestViewController" bundle:nil];
[self presentModalViewController:testView animated:YES];

这是 TestViewController 的 .h 文件:

#import <UIKit/UIKit.h>
#import <StoreKit/StoreKit.h>

@interface TestViewController : UIViewController <SKProductsRequestDelegate>
@end

这是我的 .m 文件的代码:

#import "TestViewController.h"

@implementation TestViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    SKProductsRequest *request= [[SKProductsRequest alloc] initWithProductIdentifiers:     [NSSet setWithObject: @"com.nicknoble.tiprounder.upgrade"]];
    request.delegate = self;
    [request start];
}

-(void)request:(SKRequest *)request didFailWithError:(NSError *)error
{
    NSLog(@"%@",error.description);
}

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response
{   
    NSLog(@"response recieved");
}

@end

我很绝望。任何帮助都会很棒!谢谢!

Answer 1

SKProductsRequest在请求期间需要保留实例。如果不是，它将默默地死去(不通知其代表)，因为没有其他东西保留它。

现在，ARC 将摆脱您的 SKProductsRequest一旦代码退出分配它的范围。

一个解决方案是保留您的 SKProductsRequest在 ivar 中并将其设置为 nil当请求完成/失败时。这也很方便防止在已经有一个请求的情况下启动一个请求:

// Define _productsRequest as an ivar of type SKProductsRequest in your class

- (void)someMethodThatInitiatesTheProductsRequest
{
    if( _productsRequest != nil )
        return; // There's already a request in progress. Don't start another one.

    SKProductsRequest *request= [[SKProductsRequest alloc] initWithProductIdentifiers: [NSSet setWithObject: @"com.nicknoble.tiprounder.upgrade"]];
    request.delegate = self;
    [request start];

    _productsRequest = request; // <<<--- This will retain the request object
}

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response
{   
    NSLog(@"response recieved");
    _productsRequest = nil; // <<<--- This will release the request object
}

-(void)request:(SKRequest *)request didFailWithError:(NSError *)error
{
    NSLog(@"%@",error.description);
    _productsRequest = nil; // <<<--- This will release the request object
}