Iphone ASIFormDataRequest错误

NSData

-DictionaryFomapplerResponse

返回一个

NSDictionary

。我不明白为什么会出现以下错误：

- (void) recordTransaction: (SKPaymentTransaction *) transaction {
    NSDictionary * receipt = [transaction.transactionReceipt dictionaryFromAppleResponse];
    NSDictionary * purchaseInfo = [[NSData dataFromBase64String: [receipt objectForKey: @"purchase-info"]] dictionaryFromAppleResponse];

    NSURL * url = [NSURL URLWithString: @"http://..."];

    ASIFormDataRequest * request = [ASIFormDataRequest requestWithURL: url];
    [request setDelegate: self];

    [request setPostValue: [NSNumber numberWithBool: YES] forKey: @"upload"];
    [request setPostValue: [[[NSBundle mainBundle] infoDictionary] objectForKey: @"CFBundleDisplayName"] forKey: @"app_id"];
    [request setPostValue: [receipt descriptionInStringsFileFormat] forKey: @"receipt"];
    [request setPostValue: [purchaseInfo descriptionInStringsFileFormat] forKey: @"purchase_info"];

    [WTFeedbackView switchToProgressView];
    [request setUploadProgressDelegate: [WTFeedbackView class]];

    NSLog(@"Before -startAsynchronous call.");
    [request startAsynchronous];
    NSLog(@"After  -startAsynchronous call.");
}

---

如果您在objc_exception_throw上添加断点，这将有助于您获得更多关于错误具体位置的信息（如果这样做，请将回溯添加到问题中）

假设错误来自ASIHTTPRequest本身，它使用NSInvocation与它的委托进行对话。我怀疑你代码中的这一行：

Error Domain=ASIHTTPRequestErrorDomain Code=10 "NSInvalidArgumentException" UserInfo=0x19eb00 {NSLocalizedFailureReason=+[NSInvocation invocationWithMethodSignature:]: method signature argument cannot be nil, NSUnderlyingError=0x19eae0 "The operation couldn’t be completed. (ASIHTTPRequestErrorDomain error 10.)", NSLocalizedDescription=NSInvalidArgumentException}

---

我不确定是否可以将progress委托设置为类，我一直认为它必须是一个实际对象-也许尝试删除它，我怀疑它会使错误消失。

可能就是这样。我会调查一下课堂上的事情，然后再打给你。

[request setUploadProgressDelegate: [WTFeedbackView class]];