Alamofire 网络请求 - 初体验

Alamofire的请求数据的方法：

public func request(_ url: URLConvertible, method: HTTPMethod = .get, parameters: Parameters? = nil, encoding: ParameterEncoding = URLEncoding.default, headers: HTTPHeaders? = nil)

• 使用：

Alamofire.request(dataURL, method: .get, parameters: ["q": keyword, "count": "10"], encoding: URLEncoding.default, headers: nil).responseJSON { (response) in

}

• HTTPMethod

public enum HTTPMethod: String {

case options = "OPTIONS"

case get    = "GET"

case head    = "HEAD"

case post    = "POST"

case put    = "PUT"

case patch  = "PATCH"

case delete  = "DELETE"

case trace  = "TRACE"

case connect = "CONNECT"

}

• 编码 :
  ParameterEncoding:

URLEncoding:

1 - URLEncoding和URL相关的编码，有两种编码方式：

直接拼接到URL中

通过request的httpBody传值

2 - JSONEncoding把参数字典编码成JSONData后赋值给request的httpBody

3 - PropertyListEncoding把参数字典编码成PlistData后赋值给request的httpBody

报错 "Extra argument 'method' in call"

一般会有这样几个原因：

1、url是字符串格式

2、parameters格式没写对，如果空写nil或[:]就行

3、encoding写错了