Applescript create folder with properties - applescript

Question

This is my code:
on startButton_(sender)
set folderDestination to choose folder
log folderDestination
log nameOfFolder
tell application "Finder"
make new folder at folderDestination with properties {name:nameOfFolder}
end tell
end startButton_
The idea ist to make a folder at the folder Destination (folderDestination) with the name of the folder (nameOfFolder).
This is the error from the console
2021-03-13 09:28:02.844240+0100 Folder Creator[1571:39314] *** -[AppDelegate startButton:]: Finder got an error: Can’t make «class ocid» id «data optr0000000059FEE7F626C77C59» into type Unicode text. (error -1700)
But the log from the folder Destination and name did work:
2021-03-13 09:28:02.750713+0100 Media Folder Creator[1571:39314] file:///Users/name/Desktop/
and:
2021-03-13 09:28:02.753207+0100 Media Folder Creator[1571:39314] folderName123
The textfield in Xcode is connected to nameOfFolder.
Model Key Path: nameOfFolder
I do not know where the error is.
Thanks for your help.

Answer 1

The problem is nameOfFolder is an NSString object, you have to bridge it to AppleScript by coercing it to text:
make new folder at folderDestination with properties {name:nameOfFolder as text}
But since you are already in the Cocoa world it would be more efficient to create the folder with NSFileManager.
on startButton:sender
set folderDestination to POSIX path of (choose folder)
log folderDestination
log nameOfFolder
set fileManager to current application's NSFileManager's defaultManager()
set {success, fmError} to fileManager's createDirectoryAtPath:(folderDestination & nameOfFolder as text) withIntermediateDirectories:false attributes:(missing value) |error|:(reference)
if success is false then log fmError's localizedDescription()
end startButton: