ios - How to "invalidate" MFMessageComposeViewController (Obj-C) -


i have ibaction opens text message dialog when pressed, using mfmessagecomposeviewcontroller. have if statement containing statements , want make mfmessagecomposeviewcontroller "invalidated" if 1 of if statements true when pressed on same ibaction.

so question simple, how "invalidate" mfmessagecomposeviewcontroller? or @ least make dialog not appear?

edit (code):

if ([mfmessagecomposeviewcontroller cansendtext])  {      nsmutablearray *recipients = [nsmutablearray array];      if (loadstring.length > 0) {         [recipients addobject:loadstring];     }      if (loadstring2.length > 0) {         [recipients addobject:loadstring2];      }      if (loadstring3.length > 0) {         [recipients addobject:loadstring3];      }      [controller setrecipients:recipients];     [controller setbody:thelocation];     [self presentviewcontroller:controller animated:yes completion:null];  } else {      nslog(@"can't open text.");  }  }

thanks!

because mfmessagecomposeviewcontroller instance of uiviewcontroller. can dismiss using dismissviewcontrolleranimated if don't want anymore.

and better handle mfmailcomposeviewcontrollerdelegate , here sample code it:

- (void)mailcomposecontroller:(mfmailcomposeviewcontroller *)controller didfinishwithresult:(mfmailcomposeresult)result error:(nserror *)error {     nslog(@"%@", error);     switch (result) {         case mfmailcomposeresultcancelled: {             [controller dismissviewcontrolleranimated:yes completion:^(){                 [svprogresshud showinfowithstatus:@"the email cancelled"];             }];             break;         }          case mfmailcomposeresultfailed: {              [svprogresshud showerrorwithstatus:@"failed send"];              break;         }          case mfmailcomposeresultsaved: {             [controller dismissviewcontrolleranimated:yes completion:^(){                 [svprogresshud showerrorwithstatus:@"the draft saved"];             }];             break;         }          case mfmailcomposeresultsent: {             [controller dismissviewcontrolleranimated:yes completion:^(){                 [svprogresshud showsuccesswithstatus:@"sent successfully"];             }];             break;         }          default:             break;     } }

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