ASIFormDataRequest错误

Question

- (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.");
}

NSData -dictionaryFromAppleResponse返回NSDictionary。我不知道为什么会出现以下错误：

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}

Answer 1

如果您在objc_exception_throw上添加了断点，这将帮助您获得更多关于错误位置的信息(如果您这样做了，请务必将回溯添加到您的问题中)。

假设错误来自ASIHTTPRequest本身，它使用NSInvocation与它的委托对话。我对您的代码中的这一行表示怀疑：

[request setUploadProgressDelegate: [WTFeedbackView class]];

我不确定您是否可以将进度委托设置为一个类，我一直认为它必须是一个实际的对象-也许可以尝试删除它，我怀疑它会使错误消失。