swift

[Solved] Get letters from string swift

by

You can do it this way: let myString = “so123han” let alphaChars = myString.unicodeScalars.filter({ CharacterSet.letters.contains($0) }).map({ Character($0) }) 3 solved Get letters from string swift

[Solved] Variable assignment in if statement

by

There’s no such equivalent solution in JavaScript, because there’s no equivalent problem. What you’re demonstrating is conditional binding, which exists to allow you to create a non-optional value (x, in your example), out of an optional value (y). There’s no such need in Javascript, because all values are nullable, for better or for worse. You … Read more

[Solved] how to create json string in swift and send it to server

by

let parameters: [String: AnyObject] = [ “Notification”: [ “id”: “15”, ………. …… ] ] Alamofire.request(.POST, “http://server.com”, parameters: parameters, encoding: .JSON) .responseJSON { request, response, JSON, error in print(response) print(JSON) print(error) } solved how to create json string in swift and send it to server

[Solved] Trim String before specific character?

by

Get the first index of the dot and get the substring after that index let str = “asderwt.qwertyu.zxcvbbnnhg” if let index = str.firstIndex(where: { $0 == “.” }) { print(str[index…])//.qwertyu.zxcvbbnnhg } solved Trim String before specific character?

[Solved] I Want to pull a result from a Pickerview and put it in a label in another view controller in xcode with swift 3 [closed]

by

Basic Step: 1) Get value from Picker : => use below datasource method func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { // use the row to get the selected row from the picker view // using the row extract the value from your datasource (array[row]) // Put code for add value on UILabel … Read more

[Solved] How to set up UITextFieldDelegate for multiple text fields? [closed]

by

If your goal is to have all three text fields follow the same rule, set the delegate for all three. The shouldChangeCharactersIn only needs to check the “current” text field into which the user is currently typing. A minor observation, but I also would avoid recreating the CharacterSet of allowed characters repeatedly. You can simply … Read more

[Solved] iOS – Cannot assign value of type ‘Double’ to type ‘Float’

by

First, use camelCase for naming in Swift. lowerCamelCase for constants/variables/functions and UpperCamelCase for types (classes, …) MAX_RADIUS_IN_MILE -> maxRadiusInMile Now to your problem. Error is clear, you have constant of type Double (if you don’t specify type of decimal number, compiler give it type Double), but assigning maximumValue requires type Float. What now? One solution … Read more

[Solved] Reset Score Button iOS

by

@IBOutlet weak var batsmenScoreStepper:UIStepper! @IBAction func resetScoreButton(_ sender: Any) { batsmenScoreStepper.value = 0.0; displayBatsmenOneScoreLabel.text = “\(batsmenScoreStepper.value)” } you should first take outlet of your UIStepper and reset it. 1 solved Reset Score Button iOS

[Solved] Reverse every array in an array of arrays in Swift

by

You should iterate through every element with map and reverse them. let playersReversed = players.map { $0.reversed() } Keep in mind that this will return an array of reversed collections and not an array of arrays of strings. To do that, convert the result of the reversion to Array: let playersReversed = players.map { Array($0.reversed()) … Read more

[Solved] Facebook friends list in swift

by

You haven’t given much code, but it looks like you are forgetting to cast your data array after you’ve retrieved the information. It’s kind of hard to tell without looking at your other code, but you might find this answer useful. Here is an example of proper data casting and retrieval. func tableView(tableView: UITableView!, didSelectRowAtIndexPath … Read more

[Solved] Difference in writing a code [closed]

by

I also really don’t get your intention. However, viewDidLoad is called exactly once, when the controller is first loaded into memory. That’s the point where you usually want to instantiate any instance variables and build any views that live for the entire lifecycle of this view controller. Nevertheless, usually the view isn’t visible at this … Read more