GoTo to a label in another function - objective-c

Question

i need to do like this:
-(void)function1{
goto start;
}
-(void)function2{
//some code
start://i need to get in here exactly, [self function2] oblige me to execute the function2 from the beginning
//some code..
}
Seems i can not, what can i do instead? thanx in advance.
EDIT: here is my actual code:
-(void)viewWillAppear:(BOOL)animated{
if (sqlite3_open(dbpath, &contactDB) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat:
#"Select quiz,question,p1,p2,p3,num_correct from question where quiz=(select id from quiz where nom = \'%#\' and niveau= \'%i\' and theme=(select id from theme where nom=\'%#\'))",nomPartieQuiz,quiIslam.theGameLevel,quiIslam.themeChoisie];
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(contactDB,
query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
start://étiquette
while (sqlite3_step(statement) == SQLITE_ROW && !passToNextQuestion)
{
NSString *addressField = [[NSString alloc]
initWithUTF8String:
(const char *) sqlite3_column_text(
statement, 1)];
NSLog(#"%#",addressField);
txtView.text=addressField;
passToNextQuestion=NO;
}
sqlite3_finalize(statement);
}
sqlite3_close(contactDB);
}
}
-(IBAction)clickOnTheButton:(id)sender{
btn1.hidden=YES;
goto start;
}

Answer 1

Try this:
-(void)function1{
[self function2];
}
-(void)function2{
//some code..
}
And, using "gotos" its only allowed in a very very very specifically kind of situations, you should forget about them right now! It goes again any developing principle.

Answer 2

In regards to your edit, put the logic for the start: into it's own method, then call that method from your viewWillAppear and from any other place you need to execute it. Keep in mind you may need to make some variable global so your method can see them, but this is the idea, even if you have to modify the execution.
-(void)sqlStartLogic {
while (sqlite3_step(statement) == SQLITE_ROW && !passToNextQuestion)
{
NSString *addressField = [[NSString alloc]
initWithUTF8String:
(const char *) sqlite3_column_text(statement, 1)];
NSLog(#"%#",addressField);
txtView.text=addressField;
passToNextQuestion=NO;
}
sqlite3_finalize(statement);
}
-(void)function2 {
[self sqlStartLogic];
}