所以在这里你可以看到我的方法获取JSON。我的问题是我希望我的循环遍历每个对象。没有一个物体像现在这样10次。我知道player["1"]导致它重复获取第一个对象，这只是为了示例。我需要获取每个player信息。有人可以解决这个问题并稍微解释一下情况。
var homeTeamPlayers: [MatchUp]? = []
let urlRequest = URLRequest(url: URL(string: "http://www.fibalivestats.com/data/586746/data.json")!)
func fetchHomeTeam() {
let task = URLSession.shared.dataTask(with: urlRequest) { (data,response,error) in
if error != nil {
print(error!)
return
}
homeTeamPlayers = [MatchUp]()
do {
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as! [String : AnyObject]
if let teamsFromJSON = json["tm"] as? [String : AnyObject] {
if let homeTeam = teamsFromJSON["1"] as? [String : AnyObject] {
if let player = homeTeam["pl"] as? [String : AnyObject] {
for _ in player {
let homeTeamPlayer = MatchUp()
if let firstPlayer = player["1"] as? [String : AnyObject] {
if let name = firstPlayer["name"] as? String {
homeTeamPlayer.homeTeam_name = name
}
}
homeTeamPlayers?.append(homeTeamPlayer)
}
}
}
}
} catch let error {
print(error)
}
}
task.resume()
}
这是我想要获取的JSON ......
{
tm: {
1: {
pl: {
1: {
name: "R. Miniotas"
},
2: {
name: "T. Delininkaitis"
},
3: {
name: "V. Cizauskas"
},
4: {
name: "T. Klimavicius"
},
5: {
name: "V. Lipkevicius"
},
6: {
name: "M. LinkeviÄius"
},
7: {
name: "D. Seskus"
},
8: {
name: "T. Michnevicius"
},
9: {
name: "D. Gvezdauskas"
},
11: {
name: "A. Valeika"
}
}
答案 0 :(得分：3)
您需要使用for (key, value) in语法枚举字典：
if let players = homeTeam["pl"] as? [String : Any] {
for (_, value) in players {
let homeTeamPlayer = MatchUp()
if let currentPlayer = value as? [String : Any],
let name = currentPlayer["name"] as? String {
homeTeamPlayer.homeTeam_name = name
}
homeTeamPlayers?.append(homeTeamPlayer)
}
}
但是为了避免空Matchup个实例，我建议
if let players = homeTeam["pl"] as? [String : Any] {
for (_, value) in players {
if let currentPlayer = value as? [String : Any],
let name = currentPlayer["name"] as? String {
let homeTeamPlayer = MatchUp()
homeTeamPlayer.homeTeam_name = name
homeTeamPlayers?.append(homeTeamPlayer)
}
}
}
注意：Swift 3中的JSON字典是[String:Any]，为什么homeTeamPlayers数组是可选的？
最后 - 像往常一样 - .mutableContainers在Swift中毫无意义。
答案 1 :(得分：1)
您的JSON数据是字典词典的字典。
看起来有一个外键“tm”（团队），然后包含每个团队的键“1”，“2”等字典，然后在团队内部，有更多字典再次使用球员的钥匙“1”，“2”，“3”等。这不是一个很好的结构。
如果您不关心从字典中获取项目的顺序，那么您可以使用以下语法：
for (key, value) in dictionary
...循环遍历字典中的所有键/值对，但您需要知道未获得键/值对的顺序。它有时会按键顺序给你输入，而不是按顺序给你。
如果订单很重要，那么您需要先获取密钥，对它们进行排序，然后获取项目（或其他一些技术）。获取按键排序的值可能如下所示：
let keys = dictionary.keys.sorted($0 < $1)
for aKey in keys {
let aValue = dictionary[aKey]
//Do whatever you need to do with this entry
}
您的JSON数据需要进行一些编辑才能使其成为合法的JSON：
{
"tm" : {
"1" : {
"pl" : {
"7" : {
"name" : "D. Seskus"
},
"3" : {
"name" : "V. Cizauskas"
},
"8" : {
"name" : "T. Michnevicius"
},
"4" : {
"name" : "T. Klimavicius"
},
"11" : {
"name" : "A. Valeika"
},
"9" : {
"name" : "D. Gvezdauskas"
},
"5" : {
"name" : "V. Lipkevicius"
},
"1" : {
"name" : "R. Miniotas"
},
"6" : {
"name" : "M. LinkeviÃÂius"
},
"2" : {
"name" : "T. Delininkaitis"
}
}
}
}
}
（所有的键和值都必须用引号括起来，我需要添加结束括号来终止对象图）
我编写了上面的代码并将其读入JSON对象，然后将其写回JSON而没有空格。然后我将所有引号转换为\"。
这是经过测试的代码，它将JSON解析为对象，然后通过相当多的错误检查来遍历您的数据结构：
let jsonString = "{\"tm\":{\"1\":{\"pl\":{\"7\":{\"name\":\"D. Seskus\"},\"3\":{\"name\":\"V. Cizauskas\"},\"8\":{\"name\":\"T. Michnevicius\"},\"4\":{\"name\":\"T. Klimavicius\"},\"11\":{\"name\":\"A. Valeika\"},\"9\":{\"name\":\"D. Gvezdauskas\"},\"5\":{\"name\":\"V. Lipkevicius\"},\"1\":{\"name\":\"R. Miniotas\"},\"6\":{\"name\":\"M. LinkeviÃius\"},\"2\":{\"name\":\"T. Delininkaitis\"}}}}}"
guard let data = jsonString.data(using: .utf8) else {
fatalError("Unable to convert string to Data")
}
var jsonObjectOptional: Any? = nil
do {
jsonObjectOptional = try JSONSerialization.jsonObject(with: data, options: [])
} catch {
print("reading JSON failed with error \(error)")
}
guard let jsonObject = jsonObjectOptional as? [String: Any] else {
fatalError("Unable to read JSON data")
}
//Fetch the value for the "tm" key in the outer dictionary
guard let teamsFromJSON = jsonObject["tm"] as? [String : Any] else {
fatalError("Can't fetch dictionary from JSON[\"tm\"]")
}
let teamKeys = teamsFromJSON
.keys //Fetch all the keys from the teamsFromJSON dictionary
.sorted{$0.compare($1, options: .numeric) == .orderedAscending} //Sort the key strings in numeric order
print("teamsFromJSON = \(teamsFromJSON)")
//loop through the (sorted) team keys in teamKeys
for aTeamKey in teamKeys {
guard let aTeam = teamsFromJSON[aTeamKey] as? [String: Any] else {
print("Unable to read array of teams")
continue
}
//Fetch the dictionary of players for this team
guard let playersDict = aTeam["pl"] as? [String: Any] else {
print("Unable to read players dictionary from team \(aTeamKey)")
continue
}
//Fetch a sorted list of player keys
let playerKeys = playersDict
.keys
.sorted{$0.compare($1, options: .numeric) == .orderedAscending}
print("playerKeys = \(playerKeys)")
//Loop through the sorted array of player keys
for aPlayerKey in playerKeys {
//Fetch the value for this player key
guard let aPlayer = playersDict[aPlayerKey] as? [String: String] else {
print("Unable to cast aPlayer to type [String: String]")
continue
}
//Attempt to read the "name" entry for this player.
guard let playerName = aPlayer["name"] else {
continue
}
//Deal with a player in this team
print("In team \(aTeamKey), player \(aPlayerKey) name = \(playerName)")
}
}
if let jsonData = try? JSONSerialization.data(withJSONObject: jsonObject, options: []),
let jsonString = String(data: jsonData, encoding: .ascii) {
print("\n\njsonString = \n\(jsonString)")
}
该代码的输出是：
playerKeys = ["1", "2", "3", "4", "5", "6", "7", "8", "9", "11"]
In team 1, player 1 name = R. Miniotas
In team 1, player 2 name = T. Delininkaitis
In team 1, player 3 name = V. Cizauskas
In team 1, player 4 name = T. Klimavicius
In team 1, player 5 name = V. Lipkevicius
In team 1, player 6 name = M. LinkeviÃius
In team 1, player 7 name = D. Seskus
In team 1, player 8 name = T. Michnevicius
In team 1, player 9 name = D. Gvezdauskas
In team 1, player 11 name = A. Valeika
（您的数据缺少玩家10的条目。）
答案 2 :(得分：0)
假设这是我的网址：
URL: https://maps.googleapis.com/maps/api/directions/json?origin=19.0176147,72.8561644&destination=26.98228,75.77469&sensor=false
在浏览器中输入上面提到的网址时，谷歌会给我一个JSON响应。 在这个回复中，我必须获取距离和持续时间的值。
所以我获取值的快捷代码是：
do{
let data = try Data(contentsOf: url!)
let json = try JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions.allowFragments) as? [String: AnyObject]
if let routes = json?["routes"] as AnyObject? as? [[String: AnyObject]] {
//print(routes)
for r in routes {
if let legs = r["legs"] as? [[String: AnyObject]] {
for l in legs {
//Start Address
print("Start Address: \((l["start_address"]!) as Any)")
// End Address
print("End Address: \((l["end_address"]!) as Any)")
//Distance
if let distance = l["distance"] as? [String: AnyObject] {
distanceResult = (distance["text"]!) as Any as? String
print("Distance: \(distanceResult!)")
}
// Duration
if let duration = l["duration"] as? [String: AnyObject] {
durationResult = (duration["text"]!) as Any as? String
print("Duration: \(durationResult!)")
}
}
googleResult = distanceResult+durationResult
}
}
}
}
catch
{
distanceResult = ""
durationResult = ""
print("error in JSONSerialization")
}
if(googleResult != ""){
googleResult = "Distance: \(distanceResult!), Duration: \(durationResult!)"
}
else{
print("googleResult is nil")
distanceResult = ""
durationResult = ""
}
return googleResult