这是JSON：
sudo cat /proc/$(pidof mongod)/status我试图遍历此JSON数据以查看isCurrentSeason是否为true。如果是真的，我需要存储它的“ id”。
这是我当前的实现方式：
{
"data": [
{
"type": "season",
"id": "season.1",
"attributes": {
"isCurrentSeason": true,
"isOffseason": false
}
},
{
"type": "season",
"id": "season2",
"attributes": {
"isCurrentSeason": false,
"isOffseason": false
}
}
}
在案例.Success行上，我不断收到错误Alamofire.request(request).responseJSON { response in
switch response.result {
case .Success(let _data):
print(_data)
if let DataObject = _data["data"] as? NSDictionary {
if let Attributes = DataObject["attributes"] as? [NSDictionary] {
for attribute in Attributes {
if Attributes["isCurrentSeason"] = true {
currentSeasonID = Attributes["isCurrentSeason"]
}
}
}
}
default:
break;
}
}
。因此，我什至无法测试它是否提取正确的数据。不确定是否有更好的方法来遍历和记录数据。
答案 0 :(得分：0)
首先，您不应该使用NSDictionary代替Swift的Dictionary。其次，您不使用与响应中返回的类型相同的类型转换data。当您将其强制转换为array时，它应该是dictionary中的dictionary，它将始终失败。我不确定您使用的是哪个版本的Alamofire，但是在当前版本中，枚举Result<Any>成功的案例是camelCase，即.success(let data)。如果出现错误，请使用您已经拥有的错误，即.Success(let data)。下面是固定版本，
Alamofire.request(request).responseJSON { response in
typealias JSON = [String: Any]
switch response.result {
case .success(let data):
guard let json = data as? JSON, let objects = json["data"] as? [JSON] else { return }
for object in objects {
if let attributes = object["attributes"] as? JSON,
let currentSession = attributes["isCurrentSeason"] as? Bool,
currentSession == true {
print(currentSession)
print(object["id"] as! String)
break
}
}
default:
print("Error occured")
}
}
答案 1 :(得分：0)
错误清楚地表明，_data（带有下划线的变量非常
请阅读JSON。很简单集合类型只有两种，数组（[]）和字典（{}），因此键data的值是一个数组，键attributes的值是一个字典
并且请遵循命名约定，即变量以小写字母开头，在Swift中不要使用NSArray和NSDictionary。
switch response.result {
case .Success(let response):
if let response = response as? [String:Any],
let data = response["data"] as? [[String:Any]] {
for item in data {
if let attributes = item["attributes"] as? [String:Bool],
let isCurrentSeason = attributes["isCurrentSeason"], isCurrentSeason == true {
currentSeasonID = isCurrentSeason
break // add this to exit the loop immediately if the item was found
}
}
}
default:
break
}
但是我猜currentSeasonID应该是id的值，而不是布尔值isCurrentSeason
case .Success(let response):
if let response = response as? [String:Any],
let data = response["data"] as? [[String:Any]] {
for item in data {
if let identifier = item["id"] as? String,
let attributes = item["attributes"] as? [String:Bool],
let isCurrentSeason = attributes["isCurrentSeason"], isCurrentSeason == true {
currentSeasonID = identifier
break // add this to exit the loop immediately if the item was found
}
}
}
default:
break
}
答案 2 :(得分：-1)
您可以尝试
if let content = _data as? [String:Any] {
if let dataObject = content["data"] as? [[String:Any]] {
dataObject.forEach {
if let attributes = $0["attributes"] as? [String:Bool] {
if attributes["isCurrentSeason"] == true {
print("This is true")
}
}
}
}
}
您的data是字典数组，而attributes是字典