I'm using the SwiftyDropbox library for an iOS project, getting a list of folders recursively, and checking to see if files are photos or videos.
client.files.getMetadata(path: fileURL, includeMediaInfo: true).response { response, error in
if let file = response as? Files.FileMetadata {
if file.mediaInfo != nil {
// ??? how to get file.mediaInfo.metadata
// specifically, I need the mediaMetadata
}
}
}
I can see file.mediaInfo (which, if it exists, means that metadata exists, but the documentation doesn't show how to get the actual metadata itself (specifically, dimensions for photos or durations for video).
I can get this from the description of file.mediaInfo (and parse the String that is returned from that), but that's hacky and not future-safe. Is there another way to get this data?
This is the class I want to get data from (in Files.swift):
public class MediaMetadata: CustomStringConvertible {
/// Dimension of the photo/video.
public let dimensions : Files.Dimensions?
/// The GPS coordinate of the photo/video.
public let location : Files.GpsCoordinates?
/// The timestamp when the photo/video is taken.
public let timeTaken : NSDate?
public init(dimensions: Files.Dimensions? = nil, location: Files.GpsCoordinates? = nil, timeTaken: NSDate? = nil) {
self.dimensions = dimensions
self.location = location
self.timeTaken = timeTaken
}
public var description : String {
return "\(prepareJSONForSerialization(MediaMetadataSerializer().serialize(self)))"
}
}
Here's a sample:
Dropbox.authorizedClient!.files.getMetadata(path: "/test.jpg", includeMediaInfo: true).response { response, error in
if let result = response as? Files.FileMetadata {
print(result.name)
if result.mediaInfo != nil {
switch result.mediaInfo! as Files.MediaInfo {
case .Pending:
print("Media info is pending...")
case .Metadata(let mediaMetadata):
print(mediaMetadata.dimensions)
print(mediaMetadata.location)
print(mediaMetadata.timeTaken)
}
}
} else {
print(error!)
}
}
Related
Language:Swift
Hello, I'd like some help in resolving an error being thrown when I try to retrieve data from an Apollo GraphQL request that I'm making. The API in use is the AniList API utilizing GraphQL.
Here's what I've tried:
In my model I'm making the Apollo GraphQL query inside of a search() function. I want to then use the Codable protocol to fill an array of anime objects. Currently it's setup to return just for 1 anime object. I was planning on using this anime list as a data set for TableView later. I wanted to take small steps so my current goal is to at least get the Codable protocol to work and return the response data to an anime Struct object.
The documentation for Apollo shows how to get individual fields but when I try to get the corresponding fields from my response , I don't even have the option.
func search(){
Network.shared.apollo.fetch(query: AnisearchQuery()){ result in
guard let data = try? result.get().data else { return }
var topData:APIResponse?
do{
topData = JSONDecoder().decode(APIResponse.self, from: data.self)
}catch{
}
}
}
Here are the data structures that I've set up as a representation of the JSON data I expect to receive with respect to the hierarchy it is laid out in the response.
struct APIResponse:Codable{
let data:data
}
struct data:Codable{
let Page:page
let media:media
}
struct media:Codable{
let animeResults:anime
}
struct anime:Codable{
var romaji:String
var english: String
var native:String
var episodes:Int
var duration:Int
var medium:String
}
Here is the error in question.
"Cannot convert value of type 'AnisearchQuery.Data' to expected argument type 'Data'". This is generated by this line of code
topData = JSONDecoder().decode(APIResponse.self, from: data.self)
For further context , AnisearchQuery.Data is generated in response to the query I created for the codgen.
Here's what the data would look like in JSON format
This is the setup of the query:
query anisearch($page:Int, $perPage:Int, $search:String){
Page (page:$page, perPage:$perPage){
pageInfo {
total
currentPage
lastPage
hasNextPage
perPage
}
media(search:$search){
title{
romaji
english
native
}
episodes
duration
coverImage{
medium
}
}
}
}
Here's the Data object in the API.swift file:
public struct Data: GraphQLSelectionSet {
public static let possibleTypes: [String] = ["Query"]
public static var selections: [GraphQLSelection] {
return [
GraphQLField("Page", arguments: ["page": GraphQLVariable("page"), "perPage": GraphQLVariable("perPage")], type: .object(Page.selections)),
]
}
I'd be open to any alternative methods as to getting this task done or perhaps fixes to the error being thrown.
Many thanks in advance.
Inefficient Workaround
var animeCollection:SearchAnimeQuery.Data?
var media:[SearchAnimeQuery.Data.Page.Medium]?
var filteredData:[SearchAnimeQuery.Data.Page.Medium] = []
func loadData(search:String = "") {
if !search.isEmpty{
Network.shared.apollo.fetch(query: SearchAnimeQuery(search: search)){
[weak self] result in
//Make Sure ViewController Has not been deallocated
guard let self = self else{
return
}
/*defer {
}*/
switch result {
case .success(let graphQLResult):
if let animeData = graphQLResult.data {
DispatchQueue.main.async {
self.animeCollection = animeData
self.media = self.animeCollection?.page?.media as! [SearchAnimeQuery.Data.Page.Medium]
self.filteredData = self.media!
self.tableView.reloadData()
}
}
if let errors = graphQLResult.errors {
let message = errors
.map { $0.localizedDescription }
.joined(separator: "\n")
print(message)
}
case .failure(let error):
print(error.localizedDescription)
}
}
}
}
So I have this function in class Functions :
struct Prices {
var standardPrice: Int!
}
// FUNC PRICING
class Functions {
private var PricingRef: CollectionReference!
var price = Prices()
func getPrice() -> Prices {
PricingRef = Firestore.firestore().collection("ProductXYZ")
PricingRef.getDocuments { (snapshot, error) in
if let err = error {
debugPrint("Error fetching data \(err)")
}
else {
guard let snap = snapshot else { return }
for document in snap.documents {
let data = document.data()
let std = data["standard"] as! String
self.price.standardPrice = Int(std)!
print(self.price.standardPrice!) // This print the intended result
}
}
}
return price
}
}
Then I want to pass the standardPrice value to this class, called PriceList :
class PriceList: UITableViewController {
var price = Prices()
var newStandardPrice = 0
func Price() {
price = Functions().getPrice()
newStandardPrice = price.standardPrice // always error with value nil
}
I always have that error where newStandardPrice is nil.
but the print(self.price.standardPrice!) shows number of result I want.
So as far as I know, the problem here is because it takes time for the firebase firestore to get the data from database.
How do I get the value of standardPrice after its assigned with the new price from firebase database?
Any help will be appreciated
Thankyou
you need to use completion handler because its async function
func getPrice(completion:#escaping (Prices?,Error?)-> Void) {
PricingRef = Firestore.firestore().collection("ProductXYZ")
PricingRef.getDocuments { (snapshot, error) in
if let err = error {
debugPrint("Error fetching data \(err)")
completion(nil,err)
}
else {
guard let snap = snapshot else { return }
for document in snap.documents {
let data = document.data()
let std = data["standard"] as! String
self.price.standardPrice = Int(std)!
print(self.price.standardPrice!) // This print the intended result
completion(self.price.standardPrice,nil)
}
}
}
}
How to use
Functions().getPrice { (price, error) in
if let err = error {
// do something if you get error
} else if let getPrice = price {
// use price
self.price = getPriice
}
I am trying to read from Firestore into a Dictionary[Any] type using Struct. I can get the values loaded into variable "data" dictionary with Any type.
However I cannot loop thru it to access normal nested Dictionary variable.
I cannot get Key, values printed.
Following is my code:
class PullQuestions {
//shared instance variable
**public var data = [Any]()**
private var qdb = Firestore.firestore()
public struct questionid
{
let qid : String
var questions : [basequestion]
var answers: [baseans]
}
public struct basequestion {
let category : String
let question : String
}
public struct baseans {
let answer : String
}
class var sharedManager: PullQuestions {
struct Static {
static let instance = PullQuestions()
}
return Static.instance
}
static func getData(completion: #escaping (_ result: [Any]) -> Void) {
let rootCollection = PullQuestions.sharedManager.qdb.collection("questions")
//var data = [Any]()
rootCollection.order(by: "upvote", descending: false).getDocuments(completion: {
(querySnapshot, error) in
if error != nil {
print("Error when getting data \(String(describing: error?.localizedDescription))")
} else {
guard let topSnapshot = querySnapshot?.documents else { return }
// var questiondoc = [basequestion]()
for questioncollection in topSnapshot {
rootCollection.document(questioncollection.documentID).collection("answers").getDocuments(completion: {
(snapshot, err) in
guard let snapshot = snapshot?.documents else { return }
var answers = [baseans]()
for document in snapshot { //There should be only one Document for each answer collection
//Read thru all fields
for i in 0..<document.data().count
{
let newAns = baseans(answer: answer)
print("Answer Docs=>", (answer))
answers.append(newAns)
}
}
let qid = questioncollection.documentID
let category = questioncollection.data()["category"] as! String
let question = questioncollection.data()["question"] as! String
let newQuestions = basequestion(category: category ,question: question)
let newQuestionDict = questionid(qid: qid, questions: [newQuestions], answers: answers)
PullQuestions.sharedManager.data.append(newQuestionDict)
//Return data on completion
completion(PullQuestions.sharedManager.data)
})
}
}
})
}
}
I can print like this
print("Count =>", (PullQuestions.sharedManager.data.count))
// print(PullQuestions.sharedManager.data.first ?? "Nil")
print(PullQuestions.sharedManager.data[0])
for element in PullQuestions.sharedManager.data
{
print("Elements in data:=>", (element))
}
I could access only the key.. how do i go and get the nested values ?
First of all, consider using Swift code conventions (e.g. your structs are named with small letters, but you should start with capital), this will make your code more readable.
Returning to your question. You use an array instead of dictionary (this piece of code: public var data = [Any]()). And here you are trying to print values:
for element in PullQuestions.sharedManager.data
{
print("Elements in data:=>", (element))
}
In this context element is an Any object, thus you cannot access any underlying properties. In order to do this you have two options:
1. You should specify the type of array's objects in it's declaration like this:
public var data = [questionid]()
or you can user this:
public var data: [questionid] = []
These two are equals, use the one you prefer.
2. If for any reasons you don't want to specify the type in declaration, you can cast it in your loop. Like this:
for element in PullQuestions.sharedManager.data
{
if let element = element as? quetionid {
print("Elements in data:=>", (element))
// you can also print element.qid, element.questions, element.answers
} else {
print("Element is not questionid")
}
}
You could of course use the force cast:
let element = element as! questionid
and avoid if let syntax (or guard let if you prefer), but I wouldn't recommend this, because it (potentially) can crash your app if element will be nil or any other type.
I am using MapBox to download an offline map. So that my user has access to a specific area when they go travelling.
Using the MapBox Offline documentation, it appears that the MapBox Map always tries to download (re-download) whenever there is a connection.
How do I set up my MapBox so that it performs a check in storage to see if the map has been downloaded?
func startOfflinePackDownload() {
let region = MGLTilePyramidOfflineRegion(styleURL: mapView.styleURL, bounds: mapView.visibleCoordinateBounds, fromZoomLevel: mapView.zoomLevel, toZoomLevel: 13)
let userInfo = ["name": "My Offline Pack"]
let context = NSKeyedArchiver.archivedData(withRootObject: userInfo)
MGLOfflineStorage.shared().addPack(for: region, withContext: context) { (pack, error) in
guard error == nil else {
// The pack couldn’t be created for some reason.
print("Error: \(error?.localizedDescription ?? "unknown error")")
return
}
// Start downloading.
pack!.resume()
}
}
I found the below code to check to see if the download already exists... So this would go at the start of my 'startOfflinePackDownload()' function above.
However, the newer version of MapBox doesn't recognise the code. Is someone able to help me on this please?
MGLOfflineStorage.sharedOfflineStorage().getPacksWithCompletionHandler { (packs, error) in guard error == nil else {
return
}
for pack in packs {
let userInfo = NSKeyedUnarchiver.unarchiveObjectWithData(pack.context) as! [String: String]
if userInfo["name"] == "My Offline Pack" {
// allready downloaded
return
}
}
See the mapbox Doc , MGLOfflinePackStateUnknown = 0 means the the tiles is already downloaded, so we can check the Offline pack state likewise :
Code is in Objective c , You can convert to swift
-(void)mapViewDidFinishLoadingMap:(MGLMapView *)mapView {
NSArray *arrTiles = MGLOfflineStorage.sharedOfflineStorage.packs;
if (arrTiles.count==0) {
[self startOfflinePackDownload];
}
for (MGLOfflinePack *downloadPack in arrTiles) {
NSLog(#"title: %#",downloadPack.region.description );
switch (downloadPack.state) {
case MGLOfflinePackStateUnknown:
[downloadPack requestProgress];
break;
case MGLOfflinePackStateComplete:
break;
case MGLOfflinePackStateInactive:
[downloadPack resume];
break;
case MGLOfflinePackStateActive:
[self startOfflinePackDownload];
break;
case MGLOfflinePackStateInvalid:
// NSAssert(NO, #"Invalid offline pack at index path %#", indexPath);
break;
}
}
}
You should use MGLOfflineStorage.shared().packs, note that use this method only after map is fully loaded. Implement MGLMapViewDelegate method:
func mapViewDidFinishLoadingMap(_ mapView: MGLMapView) {
print(MGLOfflineStorage.shared().packs)
}
This code snippet will print all your packs, that currently stored on device. Don't do that in viewDidLoad or viewWillAppear methods, MGLOfflineStorage.shared().packs will return nil.
After you receive your packs you can iterate through them and choose that pack what your need to resume downloading or deleting it from offline storage
UPDATE
Save somewhere in code your content pack name of your downloading region and Bool variable to determine if your pack is already downloaded
let packageName = "YourPackageName"
var isPackageNameAlreadyDownloaded = false
Func below checks if packageName is already downloaded:
func downloadPackage() {
if let packs = MGLOfflineStorage.shared().packs {
if packs.count > 0 {
// Filter all packs that only have name
let filteredPacks = packs.filter({
guard let context = NSKeyedUnarchiver.unarchiveObject(with: $0.context) as? [String:String] else {
print("Error retrieving offline pack context")
return false
}
let packTitle = context["name"]!
return packTitle.contains("(Data)") ? false : true
})
// Check if filtered packs contains your downloaded region
for pack in filteredPacks {
var packInfo = [String:String]()
guard let context = NSKeyedUnarchiver.unarchiveObject(with: pack.context) as? [String:String] else {
print("Error retrieving offline pack context")
return
}
// Recieving packageName
let packTitle = context["name"]!
if packTitle == packageName {
// Simply prints how download progress
print("Expected: \(pack.progress.countOfResourcesExpected); Completed: \(pack.progress.countOfBytesCompleted)")
print("Tile bytes completed: \(pack.progress.countOfTileBytesCompleted); Tiles Completed: \(pack.progress.countOfTilesCompleted)")
// If package isn't fully downloaded resume progress. If it downloaded - it'll check and won't redownload it
pack.resume()
isPackageNameAlreadyDownloaded = true
break
} else {
// This is another region
}
}
}
}
// If region is downloaded - return
if isPackageNameAlreadyDownloaded {
return
}
// if not - create region, map style url (which you recieve from MapBox Styler
let region = MGLTilePyramidOfflineRegion(styleURL: URL(string: YourMapStyleUrl)!, bounds: YourBoundaries, fromZoomLevel: 12, toZoomLevel: 16.5)
// Save packageName in Library and archive in package context.
let userInfo = ["name": packageName]
let context = NSKeyedArchiver.archivedData(withRootObject: userInfo)
// Create and register an offline pack with the shared offline storage object.
MGLOfflineStorage.shared().addPack(for: region, withContext: context) { (pack, error) in
guard error == nil else {
// The pack couldn’t be created for some reason.
print("Error: \(error?.localizedDescription ?? "unknown error")")
return
}
// Start downloading.
pack!.resume()
print(MGLOfflineStorage.shared().packs)
// Shows the download progress in logs
print(pack!.progress)
}
}
I'm trying to get the available iOS device storage using Swift. I found this function here
func deviceRemainingFreeSpaceInBytes() -> NSNumber {
let documentDirectoryPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
let systemAttributes = NSFileManager.defaultManager().attributesOfFileSystemForPath(documentDirectoryPath.last as String, error: nil)
return systemAttributes[NSFileSystemFreeSize] as NSNumber
}
But at compile time this error is given: [NSObject : AnyObject]? does not have a member named 'subscript' I believe this error arises from the issue mentioned here, namely that attributesOfFileSystemForPath returns an optional dictionary (documentation). I understand the problem in a general sense, but because the suggested solution involves a nested case, I don't quite see how to fix the function I'm interested in (it doesn't help that I'm quite new to Swift). Can someone suggest how to make the function work? NOTE: I'm not sure if the original function was tested by the author or if it worked under an xcode 6 beta, but it doesn't work under the GM as far as I can see.
iOS 11 Update
The answers given below no longer provide accurate results under iOS 11. There are new volume capacity keys that can be passed to URL.resourceValues(forKeys:) that provide values that match what is available in device settings.
static let volumeAvailableCapacityKey: URLResourceKey
Key for the volume’s available capacity in bytes (read-only).
static let volumeAvailableCapacityForImportantUsageKey: URLResourceKey
Key for the volume’s available capacity in bytes for storing important resources (read-only).
static let volumeAvailableCapacityForOpportunisticUsageKey: URLResourceKey
Key for the volume’s available capacity in bytes for storing nonessential resources (read-only).
static let volumeTotalCapacityKey: URLResourceKey
Key for the volume’s total capacity in bytes (read-only).
From Apple's documentation:
Overview
Before you try to store a large amount of data locally, first verify that you have sufficient storage capacity. To get the storage capacity of a volume, you construct a URL (using an instance of URL) that references an object on the volume to be queried, and then query that volume.
Decide Which Query Type to Use
The query type to use depends on what's being stored. If you’re storing data based on a user request or resources the app requires to function properly (for example, a video the user is about to watch or resources that are needed for the next level in a game), query against volumeAvailableCapacityForImportantUsageKey. However, if you’re downloading data in a more predictive manner (for example, downloading a newly available episode of a TV series that the user has been watching recently), query against volumeAvailableCapacityForOpportunisticUsageKey.
Construct a Query
Use this example as a guide to construct your own query:
let fileURL = URL(fileURLWithPath: NSHomeDirectory() as String)
do {
let values = try fileURL.resourceValues(forKeys: [.volumeAvailableCapacityForImportantUsageKey])
if let capacity = values.volumeAvailableCapacityForImportantUsage {
print("Available capacity for important usage: \(capacity)")
} else {
print("Capacity is unavailable")
}
} catch {
print("Error retrieving capacity: \(error.localizedDescription)")
}
Original Answer
Optional binding with if let works here as well.
I would suggest that the function returns an optional Int64, so that it can return
nil to signal a failure:
func deviceRemainingFreeSpaceInBytes() -> Int64? {
let documentDirectoryPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
if let systemAttributes = NSFileManager.defaultManager().attributesOfFileSystemForPath(documentDirectoryPath.last as String, error: nil) {
if let freeSize = systemAttributes[NSFileSystemFreeSize] as? NSNumber {
return freeSize.longLongValue
}
}
// something failed
return nil
}
Swift 2.1 Update:
func deviceRemainingFreeSpaceInBytes() -> Int64? {
let documentDirectory = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last!
guard
let systemAttributes = try? NSFileManager.defaultManager().attributesOfFileSystemForPath(documentDirectory),
let freeSize = systemAttributes[NSFileSystemFreeSize] as? NSNumber
else {
// something failed
return nil
}
return freeSize.longLongValue
}
Swift 3.0 Update:
func deviceRemainingFreeSpaceInBytes() -> Int64? {
let documentDirectory = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).last!
guard
let systemAttributes = try? FileManager.default.attributesOfFileSystem(forPath: documentDirectory),
let freeSize = systemAttributes[.systemFreeSize] as? NSNumber
else {
// something failed
return nil
}
return freeSize.int64Value
}
Usage:
if let bytes = deviceRemainingFreeSpaceInBytes() {
print("free space: \(bytes)")
} else {
print("failed")
}
Well, according to the above codes:
let usedSpace = totalDiskSpaceInBytes - freeDiskSpaceInBytes
you might find out that usedSpace doesn't equal the value of iPhone setting page. That is because in iOS11, Apple introduces Total available capacity in bytes for "Important" resources.
Total available capacity in bytes for "Important" resources, including
space expected to be cleared by purging non-essential and cached
resources. "Important" means something that the user or application
clearly expects to be present on the local system, but is ultimately
replaceable. This would include items that the user has explicitly
requested via the UI, and resources that an application requires in
order to provide functionality.
Examples: A video that the user
has explicitly requested to watch but has not yet finished watching or
an audio file that the user has requested to download.
This value
should not be used in determining if there is room for an
irreplaceable resource. In the case of irreplaceable resources, always
attempt to save the resource regardless of available capacity and
handle failure as gracefully as possible.
In order to get the exact same value as what we see in iPhone setting page, we can get free space by volumeAvailableCapacityForImportantUsage
if let space = try? URL(fileURLWithPath: NSHomeDirectory() as String).resourceValues(forKeys: [URLResourceKey.volumeAvailableCapacityForImportantUsageKey]).volumeAvailableCapacityForImportantUsage {
return space ?? 0
}
You can use the following UIDevice extension:
Swift4
extension UIDevice {
func MBFormatter(_ bytes: Int64) -> String {
let formatter = ByteCountFormatter()
formatter.allowedUnits = ByteCountFormatter.Units.useMB
formatter.countStyle = ByteCountFormatter.CountStyle.decimal
formatter.includesUnit = false
return formatter.string(fromByteCount: bytes) as String
}
//MARK: Get String Value
var totalDiskSpaceInGB:String {
return ByteCountFormatter.string(fromByteCount: totalDiskSpaceInBytes, countStyle: ByteCountFormatter.CountStyle.decimal)
}
var freeDiskSpaceInGB:String {
return ByteCountFormatter.string(fromByteCount: freeDiskSpaceInBytes, countStyle: ByteCountFormatter.CountStyle.decimal)
}
var usedDiskSpaceInGB:String {
return ByteCountFormatter.string(fromByteCount: usedDiskSpaceInBytes, countStyle: ByteCountFormatter.CountStyle.decimal)
}
var totalDiskSpaceInMB:String {
return MBFormatter(totalDiskSpaceInBytes)
}
var freeDiskSpaceInMB:String {
return MBFormatter(freeDiskSpaceInBytes)
}
var usedDiskSpaceInMB:String {
return MBFormatter(usedDiskSpaceInBytes)
}
//MARK: Get raw value
var totalDiskSpaceInBytes:Int64 {
guard let systemAttributes = try? FileManager.default.attributesOfFileSystem(forPath: NSHomeDirectory() as String),
let space = (systemAttributes[FileAttributeKey.systemSize] as? NSNumber)?.int64Value else { return 0 }
return space
}
/*
Total available capacity in bytes for "Important" resources, including space expected to be cleared by purging non-essential and cached resources. "Important" means something that the user or application clearly expects to be present on the local system, but is ultimately replaceable. This would include items that the user has explicitly requested via the UI, and resources that an application requires in order to provide functionality.
Examples: A video that the user has explicitly requested to watch but has not yet finished watching or an audio file that the user has requested to download.
This value should not be used in determining if there is room for an irreplaceable resource. In the case of irreplaceable resources, always attempt to save the resource regardless of available capacity and handle failure as gracefully as possible.
*/
var freeDiskSpaceInBytes:Int64 {
if #available(iOS 11.0, *) {
if let space = try? URL(fileURLWithPath: NSHomeDirectory() as String).resourceValues(forKeys: [URLResourceKey.volumeAvailableCapacityForImportantUsageKey]).volumeAvailableCapacityForImportantUsage {
return space ?? 0
} else {
return 0
}
} else {
if let systemAttributes = try? FileManager.default.attributesOfFileSystem(forPath: NSHomeDirectory() as String),
let freeSpace = (systemAttributes[FileAttributeKey.systemFreeSize] as? NSNumber)?.int64Value {
return freeSpace
} else {
return 0
}
}
}
var usedDiskSpaceInBytes:Int64 {
return totalDiskSpaceInBytes - freeDiskSpaceInBytes
}
}
usage:
print("totalDiskSpaceInBytes: \(UIDevice.current.totalDiskSpaceInBytes)")
print("freeDiskSpace: \(UIDevice.current.freeDiskSpaceInBytes)")
print("usedDiskSpace: \(UIDevice.current.usedDiskSpaceInBytes)")
I have written a class to get available/used memory using Swift.
Demo at: https://github.com/thanhcuong1990/swift-disk-status
Upgrade to support Swift 3.
import UIKit
class DiskStatus {
//MARK: Formatter MB only
class func MBFormatter(_ bytes: Int64) -> String {
let formatter = ByteCountFormatter()
formatter.allowedUnits = ByteCountFormatter.Units.useMB
formatter.countStyle = ByteCountFormatter.CountStyle.decimal
formatter.includesUnit = false
return formatter.string(fromByteCount: bytes) as String
}
//MARK: Get String Value
class var totalDiskSpace:String {
get {
return ByteCountFormatter.string(fromByteCount: totalDiskSpaceInBytes, countStyle: ByteCountFormatter.CountStyle.binary)
}
}
class var freeDiskSpace:String {
get {
return ByteCountFormatter.string(fromByteCount: freeDiskSpaceInBytes, countStyle: ByteCountFormatter.CountStyle.binary)
}
}
class var usedDiskSpace:String {
get {
return ByteCountFormatter.string(fromByteCount: usedDiskSpaceInBytes, countStyle: ByteCountFormatter.CountStyle.binary)
}
}
//MARK: Get raw value
class var totalDiskSpaceInBytes:Int64 {
get {
do {
let systemAttributes = try FileManager.default.attributesOfFileSystem(forPath: NSHomeDirectory() as String)
let space = (systemAttributes[FileAttributeKey.systemSize] as? NSNumber)?.int64Value
return space!
} catch {
return 0
}
}
}
class var freeDiskSpaceInBytes:Int64 {
get {
do {
let systemAttributes = try FileManager.default.attributesOfFileSystem(forPath: NSHomeDirectory() as String)
let freeSpace = (systemAttributes[FileAttributeKey.systemFreeSize] as? NSNumber)?.int64Value
return freeSpace!
} catch {
return 0
}
}
}
class var usedDiskSpaceInBytes:Int64 {
get {
let usedSpace = totalDiskSpaceInBytes - freeDiskSpaceInBytes
return usedSpace
}
}
}
Demo:
This is similar to Martin's answer for Swift 3.1, but is converted to an extension of UIDevice to make accessing it easier.
extension UIDevice {
var systemSize: Int64? {
guard let systemAttributes = try? FileManager.default.attributesOfFileSystem(forPath: NSHomeDirectory() as String),
let totalSize = (systemAttributes[.systemSize] as? NSNumber)?.int64Value else {
return nil
}
return totalSize
}
var systemFreeSize: Int64? {
guard let systemAttributes = try? FileManager.default.attributesOfFileSystem(forPath: NSHomeDirectory() as String),
let freeSize = (systemAttributes[.systemFreeSize] as? NSNumber)?.int64Value else {
return nil
}
return freeSize
}
}
To get free space:
UIDevice.current.systemFreeSize
And to get total space:
UIDevice.current.systemSize