Question

尝试将嵌套参数的信息发布到rails应用程序并遇到一些麻烦。

#pragma mark - Begin Network Operations
- (void)beginNetworkOperation {
    NSURL *requestURL = [NSURL URLWithString:[self retrieveURL]];
    ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:requestURL];

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_4_0
    [request setShouldContinueWhenAppEntersBackground:YES];
#endif

    [request setRequestMethod:@"PUT"];

    [request addRequestHeader:@"Content-Type" value:@"application/json"];

    [request addPostValue:strClientId forKey:@"client_id"];
    [request addPostValue:strAccessToken forKey:@"access_token"];

    NSDictionary *assetDictionary = [NSDictionary dictionaryWithObject:self.tags forKey:@"tags"];
    [request addPostValue:assetDictionary forKey:@"asset"];

    [request setDelegate:self];
    [request setDidFinishSelector:@selector(requestFinished:)];
    [request setDidFailSelector:@selector(requestFailed:)];
    [request startSynchronous];
}

self.tags只是一个带有逗号分隔值的NSString，但是一旦到达rails服务器，就无法读取tags参数（params [：asset] [：tags]）。

Answer 1

尝试将字典作为JSON字符串传递，而不是字典对象。

你可以使用iOS5 JSON库或者这个来实现更好的兼容性：

https://github.com/stig/json-framework

我所做的是使用appendPostData，因为我很确定设置标头（addRequestHeader）和使用addPostValue是不兼容的功能。以下是我的代码示例：

ASIFormDataRequest *request;
[request addRequestHeader:@"Content-Type" value:@"application/json"];
[request appendPostData:[[SBJsonWriter new] dataWithObject:myDictionaryToPassAsAnArgument]];

使用appendPostData时，不能使用任何addPostValue。你必须将所有内容都放在字典中。

Answer 2

以下是iOS上JSONKit的工作代码片段。

[request addRequestHeader:@"Content-Type" value:@"application/json"];

NSMutableDictionary *requestDict = [[NSMutableDictionary alloc] init];
[requestDict setObject:@"iSteve" forKey:@"UserId"];
[requestDict setObject:@"1" forKey:@"CompanyCode"];
[requestDict setObject:@"IN" forKey:@"LineOfBusiness"];
[requestDict setObject:@"M" forKey:@"LineOfBusinessClassification"];
[requestDict setObject:pricingVariablesListString forKey:@"CarQuoteString"];
[request appendPostData:[requestDict JSONData]];

使用ASDHTTPRequest使用NSDictionary对嵌套的params进行POST

2 个答案: