I would like the text entry on a text field to be upper case only.
Is there a way to limit the text field to output only upper case letters or even limit the software keyboard to only display upper case letters to users?
To convert a String to Uppercase in Swift, use String. uppercased() function. Call uppercased() function on the String. The function returns a new string with the contents of the original string transformed to uppercase alphabets.
SwiftUI's TextField view normally lets users write their text in whatever case they want, but if you want to control that you can force either uppercase or lowercase text using the textCase() modifier. Important: If you're using Xcode 12 you need to use RoundedBorderTextFieldStyle() rather than .
How do you make a text field Uneditable in Swift? Within code: textfield. enable = false.
let textFieldOutput = "Wait a moment, please."
let newString = textFieldOutput.uppercased()
//The string is now "WAIT A MOMENT, PLEASE."
Step-1. In Main.Storyboard select the textfield and click on attribute inspector
Step-2. Then in text input traits -> select 'All Characters' in Capitalization.
You can change the text to upper case with
string.uppercaseStringWithLocale(NSLocale.currentLocale())
You can use the method textField:shouldChangeCharactersInRange:replacementString: to change the text.
There are at least two options:
Use the uppercaseString
property of Swift's String
class to generate an all-uppercase version of the text. This is a reasonable option if you want an upper case version of whatever is typed into the text field.
Implement the method textField(_:shouldChangeCharactersInRange:replacementString:)
in the text field's delegate. Your implementation should do the replacement itself using an upper case version of the replacement string, and then return false
. This is the approach you want if it's important that the text appear upper case in the text field.
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