使用Xcode 7.1
Using Xcode 7.1
在Alamofire responseJSON请求中,我无法放置4个参数。 下面是代码
In the Alamofire responseJSON request I cannot put 4 parameters. Below is the code
let url2 = "httpbin/get" Alamofire.request(.GET, url2).responseJSON{ request, response, JSON, error in print(JSON) }我收到此错误:元组类型为((NSURLRequest ?, NSHTTPURLResponse ?, Result)'(aka'(Optional,Optional,Result)')和'((_,_,_ ,_)'具有不同数量的元素(3个与4个)
I get this error: Tuple types '(NSURLRequest?, NSHTTPURLResponse?, Result)' (aka '(Optional, Optional, Result)') and '(_, _, _, _)' have a different number of elements (3 vs. 4)
如果我从中删除了 错误参数responseJSON 并运行它...该应用程序已构建,但控制台上未打印json。.
If I remove the "error" parameter from responseJSON and run it...the app builds but no json is printed on the console..
let url2 = "httpbin/get" Alamofire.request(.GET, url2).responseJSON{ request, response, JSON in print(JSON) }控制台输出
没有JSON被打印。如果您从代码中示例 URL ,您将看到JSON。
There is no JSON being printed. If you go to sample URL from the code you will see JSON.
我已经按照 GitHub 上的说明进行操作,但是它不起作用
I have followed the instructions from GitHub but its not working
推荐答案Alamofire v1.x具有 responseJSON 闭包的四个参数。 Alamofire v2.x具有三个参数。 Alamofire v3.x现在使用单个参数调用 Response :
Alamofire v1.x had four parameters to the responseJSON closure. Alamofire v2.x had three parameters. Alamofire v3.x now calls the closure with a single parameter, a Response:
Alamofire.request(.GET, url2).responseJSON { response in switch (response.result) { case .Success(let value): print(value) case .Failure(let error): if let data = response.data, let string = String(data: data, encoding: NSUTF8StringEncoding) { print(string) } print(error) } }或者,您可以使用 isSuccess , isFailure ,值,数据和错误为结果计算的属性,例如:
Alternatively, you can use the isSuccess, isFailure, value, data and error computed properties for Result, e.g.:
Alamofire.request(.GET, url2).responseJSON { response in print(response.result.value) }[此版本已针对Alamofire 3语法进行了更新。如果您需要Alamofire 2语法,请参考此问题的修订历史记录。]
[This has been updated for the Alamofire 3 syntax. If you need the Alamofire 2 syntax, please refer to this question's revision history.]
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