Alamofire新版本request方法参数变化

[narakai]

闭包的三个参数变为一个，修改为下面的代码编译运行OK：

Alamofire.request(.GET, "http://news-at.zhihu.com/api/4/themes").responseJSON { response in
guard response.result.error == nil else {
print("获取数据失败")
return
}
let data = JSON(response.result.value!)["others"]
for i in 0 ..< data.count {
self.themes.append(ThemeModel(id: String(data[i]["id"]), name: data[i]["name"].string!))
}
}