macOS Limit textfield character length

[abcdefg12345]

Im trying to limit the the character length in a text field but i keep having problem with my code

AppDelegate.h

- (BOOL)textField:(NSTextField *)textField;

AppDelegate.m

#define MAX_LENGTH 20

- (BOOL)textField:(NSTextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    if (textField.text.length >= MAX_LENGTH && range.length == 0) 
    {
    	return NO;
    }
    else
    {return YES;}
}

what am i doing wrong i'm getting an error on

if (textField.text.length >= MAX_LENGTH && range.length == 0)

Property 'text' not found on an object of type 'NSTextField *'

 

[robbieduncan]

Which part of the documentation says it has a text property? Also please use code tags (I've edited your post).

 

[abcdefg12345]

Which part of the documentation says it has a text property? Also please use code tags (I've edited your post).

if (textField.text.length >= MAX_LENGTH && range.length == 0)

i also took a screen shot of the code if my code doesn't work can u please provide me with a code that works.

all i want is to limit the amount of numbers/letters that i can enter into a text field.
i found lots of codes online but they ether don't work or they are for iOS i need something for mac

 

[robbieduncan]

if (textField.text.length >= MAX_LENGTH && range.length == 0)

i also took a screen shot of the code if my code doesn't work can u please provide me with a code that works.

all i want is to limit the amount of numbers/letters that i can enter into a text field.
i found lots of codes online but they ether don't work or they are for iOS i need something for mac

That's your code. That is not documentation. The documentation is here.

 

[ArtOfWarfare]

On an unrelated note, look up the const keyword. Using #define instead of const is like using goto label instead of functions.

 

[devilofspades]

if (textField.text.length >= MAX_LENGTH && range.length == 0)

i also took a screen shot of the code if my code doesn't work can u please provide me with a code that works.

all i want is to limit the amount of numbers/letters that i can enter into a text field.
i found lots of codes online but they ether don't work or they are for iOS i need something for mac

thats because an NSTextField doesn't have a "text" property. it is a subclass of "NSControl" and it has a method for "stringValue". you will need to take that "stringValue" and manipulate it that way via some of NSStrings methods.