ios7 – 在iOS 7中设置Alamofire中的自定义HTTP标头不工作

这对iOS7没有影响：

Alamofire.Manager.sharedInstance.session.configuration.HTTPAdditionalHeaders = ["CustomHeader": customValue]

然而,这将适用于iOS7和8：

var headers = Alamofire.Manager.sharedInstance.session.configuration.HTTPAdditionalHeaders ?? [:]
    headers["CustomHeader"] = customValue

    let configuration = NSURLSessionConfiguration.defaultSessionConfiguration()
    configuration.HTTPAdditionalHeaders = headers

    Alamofire
        .Manager(configuration: configuration)
        .request(.GET,"https://example.com/api/users",parameters: nil,encoding: .JSON)