Step:1使用CocoaPod 在swift项目中导入 AFNetworking框架

具体步骤-> http://code4app.com/article/cocoapods-install-usage 特别全

Step2:配置info.plist支持http请求（https还没看- -、）

根标签下添加 App Transport Security Settings  ，类型  Dictionary 。添加元素 Allow Arbitrary Loads   类型布尔，值为true.

    func wordsTrans(inputText:String, type:Int){
        let manager = AFHTTPRequestOperationManager();
        
        manager.GET("http://japi.juhe.cn/charconvert/change.from", parameters:["text":inputText,"type":type,"key":"用你自己的Key"], success: {
            (op:AFHTTPRequestOperation, responseData: AnyObject)
            -> Void in
            
            print("responseData = \(responseData)")
            let data = responseData as! NSDictionary;
            
            print(data["outstr"]!);
            
            },failure: {
                (operation: AFHTTPRequestOperation?,error: NSError?)
                -> Void in
                
                print("failure");
        })
    }

Bingo