I have a json string converted to string array like below:
let str = "{ \"dtResult\": [ { \"itmdtl_item_no\": \"AO406705959SE3\" }, { \"itmdtl_item_no\": \"AO406708959SE3\" } ] }"
let data = str.data(using: String.Encoding.utf8, allowLossyConversion: false)!
do {
let json = try JSONSerialization.jsonObject(with: data, options: []) as! [String: AnyObject]
let result = json["dtResult"] as? [[String:Any]] ?? [ ]
let item = result[0] as! [String:Any]
print(item)
} catch let error as NSError {
print("Failed to load: \(error.localizedDescription)")
}
When i print out the result of item, i got the value like this:
["itmdtl_item_no": AO406705959SE3]
But i just want the string "AO406705959SE3", how can i do? Thanks.
First of all don't write
let result = json["dtResult"] as? [[String:Any]] ?? [ ]
If result is nil or empty the app will crash on result[0]
Instead write to check if the array exists and is not empty
if let result = json["dtResult"] as? [[String:Any]], !result.isEmpty {
let item = result[0] as! [String:Any]
// Now get the value for key "itmdtl_item_no"
if let itemNo = item["itmdtl_item_no"] as? String {
print(itemNo)
}
}
Related
Data:
tried get data from JSON
has code with Swift run on Playground
var roadWayStatusArray = [AnyObject]()
let url = URL(string: "http://od.moi.gov.tw/data/api/pbs")
let data = try? Data(contentsOf: url!)
let json = try? JSONSerialization.jsonObject(with: data!, options: .mutableContainers)
if let results = json as? [String : AnyObject] {
if let result = results["result"] as? [[String : AnyObject]] {
for data in result {
let happendate = data["happendate"] as? String
roadWayStatusArray.append(data as AnyObject!)
}
}
}
I has tried using roadWayStatusArray.sort(by: >) but Xcode report me Ambiguous reference member '>'
How to create sort by hapendate or happentime
Your roadWayStatusArray is an array of AnyObject. There is no > operator defined for AnyObject.
The objects in roadWayStatusArray are actually dictionaries that look like this:
{
UID = "10602090007-0";
areaNm = "\U4e2d\U5c71\U9ad8\U901f\U516c\U8def-\U570b\U9053\Uff11\U865f";
comment = "\U5317\U4e0a.\U4e2d\U58e2\U670d\U52d9\U5340 \U51fa\U53e3\U531d\U9053\U4e2d \U53f3\U5074 \U5c0f\U5ba2\U8eca\U505c\U653e\Uff0c\U99d5\U99db\U7591\U4f3c\U7761\U8457\U4e86";
direction = "\U5317\U4e0a";
happendate = "2017-02-09";
happentime = "01:08:00.0000000";
modDttm = "2017-02-09 01:15:43.603";
region = N;
road = "";
roadtype = "\U5176\U4ed6";
srcdetail = "\U71b1\U5fc3\U807d\U773e";
x1 = "121.73558";
y1 = "25.12263";
}
You need to call sort(by:) with a closure that determines the sort order. For example, if you want to sort by happendate and then happentime:
roadWayStatusArray.sort(by: { (lhsAny, rhsAny) -> Bool in
let lhs = lhsAny as? [String: AnyObject]
let rhs = lhsAny as? [String: AnyObject]
let lhsKey = (lhs?["happendate"] as? String ?? "", lhs?["happentime"] as? String ?? "")
let rhsKey = (rhs?["happendate"] as? String ?? "", rhs?["happentime"] as? String ?? "")
return lhsKey < rhsKey
})
I want to get long_name from this JSON file I can just access 'results' with this code:
let url = URL(string: "https://maps.googleapis.com/maps/api/geocode/json?latlng=35.7229513,51.3566039&language=fa&key=AIzaSyBXOPT1jEYizWZHOKLwv4dhacgYTcmn3I4")!
let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
if error != nil {
print(error!)
}
else{
if let urlcontent = data {
do{
let jsonResult = try JSONSerialization.jsonObject(with: urlcontent, options: JSONSerialization.ReadingOptions.mutableContainers) as! [String:Any]
print(jsonResult["results"]!)
if let jsonResult = jsonResult["results"] as? [String: Any] {
if let address_components = jsonResult["address_components"] as? [String: Any] {
print(address_components)
if let long_name = address_components["long_name"] as? [String: Any] {
print(long_name)
}
}
}
}
catch{
print("json failed")
}
}
}
}
task.resume()
But I'm just getting result this is my JSON file:
https://maps.googleapis.com/maps/api/geocode/json?latlng=35.7339859%2C51.3393980&sensor=true_or_false&language=fa
Your result key contains Array as value not Dictionary so simply change [String:Any] to [[String:Any]] and then access address_components from the each dictionary objects of resultsArray, now address_components is also array of dictionary and long_name is inside that dictionary. So try like this.
if let resultsArray = jsonResult["results"] as? [[String: Any]] {
for dic in resultsArray {
if let addressArray = dic["address_components"] as? [[String:Any]] {
for address in addressArray {
if let longName = address["long_name"] as? String {
print(longName)
}
}
}
}
}
I don't understand how to get array from dictionary, i have tried in this code but i want get array only content and type
This is my array
{
wsResponse = {
aarti =(
{
content = "";
identifier = "slok_one";
title = 1;
type = "\U092d\U0915\U094d\U0924\U093e\U092e\U0930";
},
{
content = "";
identifier = "slok_two";
title = 2;
type = "\U092d\U0915\U094d\U0924\U093e\U092e\U0930";
},
{
content = "";
identifier = "slok_three";
title = 3;
type = "\U092d\U0915\U094d\U0924\U093e\U092e\U0930";
}
}
);
};
Here is my code
Alamofire.request(url, method: .get, parameters: nil, encoding: JSONEncoding.default)
.responseJSON { response in
if let status = response.response?.statusCode {
switch(status){
case 201:
print("example success")
default:
print("error with response status: \(status)")
}
}
//to get JSON return value
if let array = response.result.value
{
let JSON = array as! NSDictionary
print("\(JSON)")
let response = JSON["wsResponse"] as! NSDictionary
let data = response["aarti"]
}
}
i want array from this ,like content,title,type
thank you in advance
According to the JSON this prints all values in the aarti array:
if let JSON = response.result.value as? [String:Any] {
if let response = JSON["wsResponse"] as? [String:Any],
let aarti = response["aarti"] as? [[String:Any]] {
for item in aarti {
let content = item["content"] as! String
let identifier = item["identifier"] as! String
let title = item["title"] as! Int
let type = item["type"] as! String
print(content, identifier, title, type)
}
}
}
Basically do not use NSDictionary / NSArray in Swift.
If you want to put all content values in an array use flatMap. The line can replace the whole repeat loop.
let contentArray = aarti.flatMap { $0["content"] as? String }
PS: If you are going to create multiple arrays from the values don't do that: Use a custom struct or class
if someone want to get dictionary of array and use it in tableview
declaration:
var list:[Any] = []
and initialisation :
self.list = (self.ListDic?["data"] as! NSArray!) as! [Any]
and use:
let dictObj = self.list[indexPath.row] as! NSDictionary
print("object value: ",dictObj["text"] as! String)
[{"name":"Air Elemental","toughness":"4","printings":["LEA","BTD","7ED","8ED","9ED","10E","DD2","M10","DPA","ME4","DD3_JVC"]}]
I have a JSON where there is an array in each listing called "printings" as seen below, how would I take this array out of each listing and convert it into a string like "LEA-BTD-7ED". Here is what I have so far but its crashing.
let err : NSErrorPointer?
let dataPath = NSBundle.mainBundle().pathForResource("cardata", ofType: "json")
let data : NSData = try! NSData(contentsOfFile: dataPath! as String, options: NSDataReadingOptions.DataReadingMapped)
do{
var contents = try NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.AllowFragments) as! [AnyObject]
for var i = 0;i<contents.count;++i{
let printing = contents[i]["printings"] as! String
}
}
Here's the code:
let path = dataPath!
if let JSONData = NSData(contentsOfFile: path)
{
do
{
if let dictionariesArray = try NSJSONSerialization.JSONObjectWithData(JSONData, options: NSJSONReadingOptions()) as?
[[String: AnyObject]]
{
for dictionary in dictionariesArray
{
if let printingsArray = dictionary["printings"] as? [String]
{
let printingsString = printingsArray.joinWithSeparator("-")
print(printingsString)
}
}
}
}
catch
{
print("Could not parse file at \(path)")
}
}
Executing it prints "LEA-BTD-7ED-8ED-9ED-10E-DD2-M10-DPA-ME4-DD3_JVC"
You can't cast an Array (contents[i]["printings"]) to a String. What you want is Array's joinWithSeparator() method, like this:
let printing = contents[i]["printing"] as! Array
let printingStr = printing.joinWithSeparator("-")
(Actually, I'm not sure whether you need the as! Array; try it without it.)
i need to save with NSUserDefaults an array that i get from jSON, the problem is it save only the first string and not all the array. So if the array is like NewYork,London,Rome .. it save only NewYork. I use it for a picker view.
This is the code:
EDIT
For save the Array from jSON:
if let jsonData = NSJSONSerialization.JSONObjectWithData(urlData!, options: nil, error: &error) as? [String:AnyObject] { // dictionary
if let locationsArray = jsonData["locations"] as? [[String:AnyObject]] { // array of dictionaries
for locationDictionary in locationsArray { // we loop in the array of dictionaries
if let location = locationDictionary["location_name"] as? String { // finally, access the dictionary like you were trying to do
// println(location)
var locationSave: Void = save.setObject(location, forKey: "Location")
}
}
}
}
}
and for request the Array:
var Location = save.objectForKey("Location")!
var pickerviewFields = Location
return pickerviewFields.count
Thanks in advance!
You can only save an NSArray, if the Array is a Swift Array, you will need to convert it. Also, NSArray and NSDictionary objects, their contents must be property list objects.
Here's how you would convert the Array:
var MyArray = ["a", "b", "c"]
var MyNSArray: NSArray
MyNSArray = MyArray as NSArray
println("\(MyNSArray)")
Prints: (a,b,c)
I have a small example with some sample JSON:
var myJSONString: NSString = "{ \"locations\" : [ { \"location_name\" : \"A\" }, { \"location_name\" : \"B\" }, { \"location_name\" : \"C\" }, { \"location_name\" : \"D\" } ] }"
var urlData: NSData? = NSData()
var error: NSError?
var save = NSUserDefaults.standardUserDefaults()
urlData = myJSONString.dataUsingEncoding(NSUTF8StringEncoding)
if let jsonData = NSJSONSerialization.JSONObjectWithData(urlData!, options: nil, error: &error) as? NSDictionary { // dictionary
if let locationsArray = jsonData["locations"] as? NSArray { // array of dictionaries
for locationDictionary in locationsArray { // we loop in the array of dictionaries
if let location = locationDictionary["location_name"] as? NSString {
println(location)
}
}
NSUserDefaults.standardUserDefaults().setObject(locationsArray, forKey: "locationArray")
}
}
println(save.dictionaryRepresentation())
You can try this:
Writing
let locationArray = ["London", "NewYork", "Rome"]
let locationData = NSKeyedArchiver.archivedDataWithRootObject(locationArray)
NSUserDefaults.standardUserDefaults().setObject(locationData, forKey: "Location")
NSUserDefaults.standardUserDefaults().synchronize()
Reading
let locationData = NSUserDefaults.standardUserDefaults().objectForKey("Location") as? NSData
if let locationData = locationData {
let locationArray = NSKeyedUnarchiver.unarchiveObjectWithData(locationData) as? [String]
if let locationArray = locationArray {
println(locationArray)
}
}