I am working on this quote app, and I keep running into two errors that just don't want to cooperate with me. It says "Type 'businessQuote' has no member ('array'/'dict')". In the following screen shot, you will see the error on the line. The whole point is to get the app to show a random quote in the text fields provided. Could you please help me? Thank you in advance.
Code with the error
My goal is to get "ImportList" to work
'ImportList' Swift file
If there is another question like this that I have overlooked, I would appreciate it if you could link me to it. But I just really need an answer. Thank you again.
Here's the code with the error:
import Foundation
import UIKit
import Social
class businessQuote: UIViewController {
//============================//
//********** Outlets *********//
//============================//
let utility = Utility()
#IBOutlet weak var quoteDisplay: UILabel!
#IBOutlet weak var authorDisplay: UILabel!
#IBOutlet weak var quoteBackground: UIImageView! //GET BACK TO THIS
//============================//
//********** General *********//
//============================//
let date = NSDate()
var Author: String = ""
var Quote: String = ""
override func viewDidLoad() {
super.viewDidLoad()
// Checks if time is greater then 3pm to change background
let currentTime = utility.currentTime()
if (currentTime >= 15 ) {
quoteBackground.image = UIImage(named: "quote_background.png")
} else {
quoteBackground.image = UIImage(named:"morning_quote_background.png")
}
}
//============================//
//********* New Quote ********//
//============================//
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
// Generates Random Number
func randomNumber(arrayLength: Int) -> Int {
let unsignedArrayCount = UInt32(arrayLength)
let unsignedRandomNumber = arc4random_uniform(unsignedArrayCount)
let randomNumber = Int(unsignedRandomNumber)
return randomNumber
}
// Importing Quotes plist File
let businessQuotes = ImportList(FileName: "BusinessList")
// Selects Quote
let chosenQuote: String = businessQuote.array[randomNumber(businessQuote
.count())] as! String
let chosenAuthor = businessQuote.dict[chosenQuote]! as String
// Assigns Quote & Author to IBOutlet
Author = chosenAuthor
Quote = chosenQuote
quoteDisplay.text = Quote
authorDisplay.text = Author.uppercaseString
}
}
This is the code with the 'array' and 'dict'
import Foundation
struct ImportList {
let path: String
init(FileName: String) {
self.path = NSBundle.mainBundle().pathForResource("\(FileName)", ofType: "plist")!
}
var dict: Dictionary<String, String> {
return NSDictionary(contentsOfFile: path)! as! Dictionary
}
var array: Array<AnyObject> {
return [String](arrayLiteral: String(dict.keys) { $0 as AnyObject as! String })
}
func count() -> Int {
return array.count
}
}
Thank you!
You have declared variable businessQuotes as:
// Importing Quotes plist File
let businessQuotes = ImportList(FileName: "BusinessList")
But using businessQuote instead, see you are missing "s" at the end. Spelling mistake. Following lines should be:
// Selects Quote
let chosenQuote: String = businessQuotes.array[randomNumber(businessQuotes
.count())] as! String
let chosenAuthor = businessQuotes.dict[chosenQuote]! as String
Related
I'm trying to convert a string into a double in swift. I managed to extract the string from a website (www.x-rates.com) into an array but I cannot convert it after in a double in order to make some work around this number. Can anyone tell me what I'm supposed to do or what I did wrong? I know that my label don't update now but I will do it later, the first thing that I'm trying to do is the conversion.
thx a lot!
Here is the code:
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var resultLabel: UILabel!
#IBOutlet weak var moneyTextField: UITextField!
#IBAction func convert(_ sender: Any) {
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let url = URL(string: "https://www.x-rates.com/calculator/?from=EUR&to=USD&amount=1")!
let request = NSMutableURLRequest(url : url)
let task = URLSession.shared.dataTask(with: request as URLRequest) {
data, response, error in
var message = ""
if let error = error {
print(error)
} else {
if let unwrappedData = data {
let dataString = NSString(data: unwrappedData, encoding: String.Encoding.utf8.rawValue)
var stringSeperator = "<span class=\"ccOutputRslt\">"
if let contentArray = dataString?.components(separatedBy: stringSeperator){
if contentArray.count > 0 {
stringSeperator = "<span"
let newContentArray = contentArray[1].components(separatedBy: stringSeperator)
if newContentArray.count > 0 {
message = newContentArray[0]
var message = Float(newContentArray[0])! + 10
}
}
}
}
}
DispatchQueue.main.sync(execute: {
self.resultLabel.text = "the value of the dollar is " + message
}
)}
task.resume()
func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
I will talk about convert an Array of String to Array of Double.
In swift Array has a method called map, this is responsable to map the value from array, example, in map function you will receive an object referent to your array, this will convert this object to your new array ex.
let arrOfStrings = ["0.3", "0.4", "0.6"];
let arrOfDoubles = arrOfStrings.map { (value) -> Double in
return Double(value)!
}
The result will be
UPDATE:
#LeoDabus comments an important tip, this example is considering an perfect datasource, but if you have a dynamic source you can put ? on return and it will work, but this will return an array with nil
like that
let arrOfStrings = ["0.3", "0.4", "0.6", "a"];
let arrOfDoubles = arrOfStrings.map { (value) -> Double? in
return Double(value)
}
Look this, the return array has a nil element
If you use the tips from #LeoDabus you will protect this case, but you need understand what do you need in your problem to choose the better option between map or compactMap
example with compactMap
let arrOfStrings = ["0.3", "0.4", "0.6", "a"];
let arrOfDoubles = arrOfStrings.compactMap { (value) -> Double? in
return Double(value)
}
look the result
UPDATE:
After talk with the author (#davidandersson) of issue, this solution with map ou contactMap isn't his problem, I did a modification in his code and work nice.
first I replaced var message = "" per var rateValue:Double = 0.0 and replacedFloattoDouble`
look the final code
let url = URL(string: "https://www.x-rates.com/calculator/?from=EUR&to=USD&amount=1")!
let request = NSMutableURLRequest(url : url)
let task = URLSession.shared.dataTask(with: request as URLRequest) {
data, response, error in
var rateValue:Double = 0.0;
if let error = error {
print(error)
} else {
if let unwrappedData = data {
let dataString = NSString(data: unwrappedData, encoding: String.Encoding.utf8.rawValue)
var stringSeperator = "<span class=\"ccOutputRslt\">"
if let contentArray = dataString?.components(separatedBy: stringSeperator){
if contentArray.count > 0 {
stringSeperator = "<span"
let newContentArray = contentArray[1].components(separatedBy: stringSeperator)
if newContentArray.count > 0 {
rateValue = Double(newContentArray[0])! + 10
}
}
}
}
}
//
print("Rate is \(rateValue)"); //Rate is 11.167
}
task.resume()
Hope to help you
The reason your code doesn’t work in my opinion is that you have two variables with the same name that are defined in different scopes and you use the wrong one at the end.
At the beginning you define
var message = ""
And then when converting to a number further down
var message = Float(newContentArray[0])! + 10
So change the last line to something like
var number = Float(newContentArray[0])! + 10
And use number in your calculations. Although I think
var number = Double(message)
should work equally fine since you have assigned newContentArray[0] to message already and Double is more commonly used than Float (I don’t understand + 10)
I am looking for a way to simply play audio files one after another.
AVAudioPlayer using an array seems to be the best solution. In fact, I was able to play the first element of the array using Sneak's recommendations found on this page : Here.
But I don't understand where and how to write the second call to AVAudioPlayer in order to play the second file?
The "audioPlayerDidFinishPlaying" function is not reacting. Why?
Thanks for watching.
import Cocoa
import AVFoundation
var action = AVAudioPlayer()
let path = Bundle.main.path(forResource: "test.aif", ofType:nil)!
let url = URL(fileURLWithPath: path)
let path2 = Bundle.main.path(forResource: "test2.aif", ofType:nil)!
let url2 = URL(fileURLWithPath: path2)
let array1 = NSMutableArray(array: [url, url2])
class ViewController: NSViewController
{
#IBOutlet weak var LanceStop: NSButton!
override func viewDidLoad()
{
super.viewDidLoad()
do
{
action = try AVAudioPlayer(contentsOf: array1[0] as! URL)
action.numberOfLoops = 0
action.prepareToPlay()
action.volume = 1
}catch{print("error")}
}
...
#IBAction func Lancer(_ sender: NSButton)
{
if action.isPlaying == true
{
action.stop()
action.currentTime = 0.0
LanceStop.title = "Lancer"
}
else
{
action.play()
LanceStop.title = "Stopper"
}
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool)
{
if flag == true
{
LanceStop.title = "Lancer"
}
}
}
But I don't understand where and how to write the second call to
AVAudioPlayer in order to play the second file?
So in order to play the second file, you need to write one method where you will need to initialize the audioplayer and invoke the same method inside audioplayer delegate method audioPlayerDidFinishPlaying like this:-
func playAudioFile(_ index: Int) {
do
{
action = try AVAudioPlayer(contentsOf: array1[index] as! URL)
action.numberOfLoops = 0
action.prepareToPlay()
action.volume = 1
} catch{print("error")
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
//This delegate method will called once it finished playing audio file.
//Here you can invoke your second file. You can declare counter variable
//and increment it based on your file and stop playing your file acordingly.
counter = counter + 1
playAudioFile(counter)
}
Note:- Set Audioplayer delegate to your ViewController in order to get invoke
audioPlayerDidFinishPlaying method like this.
action.delegate = self
Changed Code...
class ViewController: NSViewController, AVAudioPlayerDelegate
{
#IBOutlet weak var LanceStop: NSButton!
override func viewDidLoad()
{
super.viewDidLoad()
}
override var representedObject: Any?
{
didSet
{
// Update the view, if already loaded.
}
}
func playAudioFile(_ index: Int)
{
do
{
action = try AVAudioPlayer(contentsOf: array1[index] as! URL)
action.delegate = self
action.numberOfLoops = 0
action.prepareToPlay()
action.volume = 1
action.play()
}
catch{print("error")}
}
#IBAction func Lancer(_ sender: NSButton)
{
playAudioFile(0)
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool)
{
if flag == true
{
playAudioFile(1)
}
}
}
I have created a mini translation from English words to Spanish words. I would like to use the englishArray.plist instead of my englishArray = ["the cat"] How can I create this?
I have also used a localizable.strings to retrieve the value "the cat" for "el gato" but I would like to retrieve this from englishArray.plist
I started off with this but not sure if I'm on the right path
let path = NSBundle.mainBundle().pathForResource("englishArray", ofType: "plist")
let plistEnglishArray = NSArray(contentsOfFile: path!)
Here is the rest of my code:
var englishArray: [String] = ["rainbow", "boots", "heart", "leaf", "umbrella", "tired", "angry", "cry", "the cat" ]
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.translateTextField.delegate = self
picker.delegate = self
picker.dataSource = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func translateButtonTapped(sender: UIButton) {
let emptyString = self.translateTextField.text
if (emptyString!.isEmpty) {
print("please enter a word")
}
for transIndex in englishArray.indices {
if englishArray[transIndex] == emptyString!.lowercaseString {
//englishArray
//translateLabel.text = "\(spanishArray[transIndex])"
translateLabel.text = NSLocalizedString(emptyString!.lowercaseString, comment:"")
print(emptyString)
return
}
}
}
Swift 4
The absolute simplest way to do this is
let url = Bundle.main.url(forResource: "Sounds", withExtension: "plist")!
let soundsData = try! Data(contentsOf: url)
let myPlist = try! PropertyListSerialization.propertyList(from: soundsData, options: [], format: nil)
The object myPlist is an Array or Dictionary, whichever you used as the base of your plist.
Change your root object to Array, then
var myEnglishArray: [String] = []
if let URL = NSBundle.mainBundle().URLForResource("englishArray", withExtension: "plist") {
if let englishFromPlist = NSArray(contentsOfURL: URL) as? [String] {
myEnglishArray = englishFromPlist
}
}
Swift 4
You can use Codable which is pure swift type.
Firstly load Plist file from bundle then use PropertyListDecoder
Complete code -
func setData() {
// location of plist file
if let settingsURL = Bundle.main.path(forResource: "JsonPlist", ofType: "plist") {
do {
var settings: MySettings?
let data = try Data(contentsOf: URL(fileURLWithPath: settingsURL))
let decoder = PropertyListDecoder()
settings = try decoder.decode(MySettings.self, from: data)
print("array is \(settings?.englishArray ?? [""])")//prints array is ["Good morning", "Good afternoon"]
} catch {
print(error)
}
}
}
}
struct MySettings: Codable {
var englishArray: [String]?
init(from decoder: Decoder) throws {
let values = try decoder.container(keyedBy: CodingKeys.self)
englishArray = try values.decodeIfPresent([String].self, forKey: .englishArray)
}
}
This will read a resource in your bundle with the name "englishArray.plist" and store it in the immutable variable english. It will be an Optional that you should test before using.
It uses a closure to read the file and return the array, this lets you use a immutable value rather than a mutable variable that can be changed. It's a good idea to use immutables wherever you can - they promote stability.
import Foundation
let english:[String]? = {
guard let URL = NSBundle
.mainBundle()
.URLForResource("englishArray", withExtension: "plist") else {
return nil
}
return NSArray(contentsOfURL: URL) as? [String]
}()
Here is the solution for swift 3. For this solution you do not need to change types in your plist structure (keep Dictionary, Array, as is). Also note that since your array's name in plist is also englishArray so the (value for key) argument in the second if statement is also englishArray.
var myEnglishArray: [String] = []
if let URL = Bundle.main.url(forResource: "englishArray", withExtension: "plist") {
guard let englishFromPlist = NSDictionary(contentsOf: URL) else { return [] }
if let englishArray = englishFromPlist.value(forKey: "englishArray") as? [String] {
for myEnglish in englishArray {
myEnglishArray.append(myEnglish)
}
}
}
#IBOutlet weak var enterName: UITextField!
#IBOutlet weak var presentName: UITextView!
#IBOutlet weak var independceStatue: UITextField!
#IBOutlet weak var driverSelection: UITextField!
var entity : [Entity] = []
var nameList : [String] = []
var period1 = ""
var counting = 0
override func viewDidLoad() {
super.viewDidLoad()
let context = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext
let request = NSFetchRequest(entityName: "Entity")
var results : [AnyObject]?
do{
results = try context.executeFetchRequest(request)
} catch {
results = nil
}
if results != nil {
self.entity = results as! [Entity]
}
if !entity.isEmpty{
presentName.text = entity.last?.period1Core
}
}
func setValues() {
nameList = [enterName.text!]
}
#IBAction func setName(sender: UIButton) {
setValues()
for item in nameList{
period1 += (item + " ")
}
presentName.text = period1
enterName.text = ""
}
#IBAction func start(sender: UIButton) {
let context = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext
let entity = NSEntityDescription.insertNewObjectForEntityForName("Entity", inManagedObjectContext: context) as! Entity
entity.period1Core = presentName.text
do {
try context.save()
print("Item Saved")
} catch _ {
print("Saved Failed")
}
**Problem ->** let randomIndex = Int(arc4random_uniform(UInt32(nameList.count)))
driverSelection.text! = nameList[randomIndex]
print(randomIndex)
}
I was trying to randomly pick an element out from the array name nameList, but when I run the program and print the randomIndex, after first time I press the button it will always return last element in the array.
If I exit the simulator and run it again, when I press the button it will return me fatal error Array Index is out of range. Is there somethings wrong with my code, why am I not able to make it randomly select an element from my array?
Your setValues() function always replaces the entire array with the last name entered. That's why it seems to return the last value.
you probably meant to use nameList.append(enterName.text!) in it.
The crash upon starting may occur because nameList has not yet received a name and arc4random_uniform is being called with a parameter value of zero
I am trying to save a copy of my custom class to a file, my class has 2 arrays of CGPoints which I append to every so often, they look like this:
class BlockAttributes: NSObject {
var positions:[CGPoint] = []
var spawns:[CGPoint] = []
}
Everything is working great as far as just as using and accessing the class goes, but archiving it does not work. I can archive arrays of Strings, Bools, and Ints just fine in my other classes but my game fails every time I try to use NSCoder to encode my arrays of CGPoints. Here is my code for archiving:
func encodeWithCoder(coder: NSCoder!) {
coder.encodeObject(positions, forKey: "positions")
coder.encodeObject(spawns, forKey: "spawns")
}
....
class ArchiveData: NSObject {
var documentDirectories:NSArray = []
var documentDirectory:String = ""
var path:String = ""
func saveData(data: BlockAttributes) {
documentDirectories = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
documentDirectory = documentDirectories.objectAtIndex(0) as! String
path = documentDirectory.stringByAppendingPathComponent("data.archive")
if NSKeyedArchiver.archiveRootObject(data, toFile: path) {
print("Success writing to file!")
} else {
print("Unable to write to file!")
}
}
func retrieveData() -> NSObject {
var dataToRetrieve = BlockAttributes()
documentDirectories = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
documentDirectory = documentDirectories.objectAtIndex(0) as! String
path = documentDirectory.stringByAppendingPathComponent("data.archive")
if let dataToRetrieve2 = NSKeyedUnarchiver.unarchiveObjectWithFile(path) as? BlockAttributes {
dataToRetrieve = dataToRetrieve2 as BlockAttributes
}
return(dataToRetrieve)
}
}
....
And to save:
let archiveData = ArchiveData()
archiveData.saveData(myBlockActionsObject)
I even tried creating my own custom class to save the CGPoints to, which I call MyCGPoint (I read somewhere on SO that creating custom classes for some data types resolves some NSCoder issues):
class MyCGPoint: NSObject {
var x: CGFloat = 0.0
var y: CGFloat = 0.0
init(X: CGFloat, Y: CGFloat) {
x = X
y = Y
}
override init() {
}
}
....
class BlockAttributes: NSObject {
var positions:[MyCGPoint] = []
var spawns:[MyCGPoint] = []
}
But alas, I am still getting this error:
[Game.MyCGPoint encodeWithCoder:]:
unrecognized selector sent to instance 0x137f1d1a0 Game[20953:5814436]
*** Terminating app due to uncaught exception 'NSInvalidArgumentException',
reason: '-[Game.MyCGPoint encodeWithCoder:]:
unrecognized selector sent to instance 0x137f1d1a0'
Any idea how I can use encodeObject to encode my array of CGPoints/MyCGPoints?
You can convert them to and from strings:
//To string
let point = CGPointMake(0, 0)
let string = NSStringFromCGPoint(point)
//Or if you want String instead of NSString
let string = String(point)
//From string
let point2 = CGPointFromString(string)
CGPoint (and its Cocoa's twin NSPoint) are structs, i.e. value type, so you can't encode them directly. Wrap them in NSValue:
let positionValues = positions.map { NSValue(point:$0) }
let spawnValues = spawns.map { NSValue(point:$0) }
coder.encodeObject(positionValues, forKey: "positions")
coder.encodeObject(spawnValues, forKey: "spawns")
// Decode:
positons = (coder.decodeObjectForKey("positions") as! [NSValue]).map { $0.pointValue }
spawns = (coder.decodeObjectForKey("spawns") as! [NSValue]).map { $0.pointValue }
When you write your custom wrapper class, you have to make it compliant with NSCoding too, which NSValeu had already done for you, for free.