iphone - Call function from UIActionSheet -

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i have stupid problem uiactionsheet. want function "sendmail" launched clicking on first button of action sheet.

so here did :

- (void)actionsheet:(uiactionsheet *)actionsheet clickedbuttonatindex:(nsinteger)buttonindex{     nslog(@"%d", buttonindex);      if (buttonindex == 0) {         sendmail();      } }

i declared function sendmail in .h file, contains :

-(void)sendmail; -(void)actionsheet;

when want build , run, have following error :

undefined symbols:       "_sendmail", referenced from:       -[my1viewcontroller actionsheet:clickedbuttonatindex:] in my1viewcontroller.o     ld: symbol(s) not found     collect2: ld returned 1 exit status

i don't understand going on. if copy/paste what's inside sendmail function inside (void)actionsheet function, works charm. looks call of sendmail function problem, , don't understand why.

thanks !

objective-c calls methods not functions , it's this:

[self sendmail];

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