How do you put a (IBAction) inside an "if" statement???

tackey123 · 04-23-2010, 01:50 PM

Here is my code

Code:

	
if (row == 0) {
		
- (IBAction)go {
			
}
		
}

When I try to run it I get this error,

Code:

error: 'go' undeclared (first use in this function)
error: expected ';' before '{' token

But when I move the IBAction code outside of the if statement everything builds fine. What am I doing wrong?!!?!?!?

Thanks in advanced!

csnplt · 04-23-2010, 01:58 PM

Quote:

Originally Posted by tackey123

Here is my code

Code:

	
if (row == 0) {
		
- (IBAction)go {
			
}
		
}

When I try to run it I get this error,

Code:

error: 'go' undeclared (first use in this function)
error: expected ';' before '{' token

But when I move the IBAction code outside of the if statement everything builds fine. What am I doing wrong?!!?!?!?

Thanks in advanced!

I think you are misunderstanding how this works. Declare your method somewhere in your file, and then do something like this:

Code:

-(IBAction)myIBActionMethod
{
      //Do something here
}

-(void)didSelectRowAtIndexPath: ...
{
     if(row == 0)
     {
           [self myIBActionMethod];
     }

}

tackey123 · 04-23-2010, 02:06 PM

Quote:

Originally Posted by csnplt

I think you are misunderstanding how this works. Declare your method somewhere in your file, and then do something like this:

Code:

-(IBAction)myIBActionMethod
{
      //Do something here
}

-(void)didSelectRowAtIndexPath: ...
{
     if(row == 0)
     {
           [self myIBActionMethod];
     }

}

No, what I am trying to do is make it so the button doesn't do anything when you click on it until the "if" statement is true.

csnplt · 04-23-2010, 02:17 PM

Quote:

Originally Posted by tackey123

No, what I am trying to do is make it so the button doesn't do anything when you click on it until the "if" statement is true.

I see. Do something like this:

Code:

-(IBAction)myIBActionMethod
{
     //Do something here
}

if(row == 0)
{
     [self myIBActionMethod];
}

tackey123 · 04-23-2010, 02:29 PM

Quote:

Originally Posted by csnplt

I see. Do something like this:

Code:

-(IBAction)myIBActionMethod
{
     //Do something here
}

if(row == 0)
{
     [self myIBActionMethod];
}

No still not right.

What I am trying to do is something similar to the app iFart, it has a scroll wheel and you choose what sound you want them press a button and it plays.

Here is where the problem is:

Code:

- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
	

	
	if (row == 1) {
		
		- (IBAction)go {
			
			//do someting
			
		}
		
	}
	
	
	
	
}

CunningCat · 04-23-2010, 02:32 PM

why don't you put inside the IBAction an if statement seeing if it is the correct row and if it isn't just don't do anything

tackey123 · 04-23-2010, 02:40 PM

Quote:

Originally Posted by CunningCat

why don't you put inside the IBAction an if statement seeing if it is the correct row and if it isn't just don't do anything

I tried that:

Code:

- (IBAction)fart {
	
	
	if (row == 1) {
		
		
		
	}
	
	
	
}

But I get this error:

Code:

error: 'row' undeclared (first use in this functions)

**rocotilos** · 04-23-2010, 02:42 PM

I think this is the code you want:

Code:

- (void)go1 {
			
			//do someting
			
}


- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
	

	
	if (row == 1) {
		
		[self go1];
		
	}
	
	
	
	
}

HTH

tackey123 · 04-23-2010, 02:48 PM

Quote:

Originally Posted by rocotilos

I think this is the code you want:

Code:

- (void)go1 {
			
			//do someting
			
}


- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
	

	
	if (row == 1) {
		
		[self go1];
		
	}
	
	
	
	
}

HTH

Yes that works, but I can't put an - (IBAction) inside a - (void). I get errors saying undeclared. I guess the question is really, "how do you put a (IBAction) inside a (void)"

**rocotilos** · 04-23-2010, 02:56 PM

nothing

**rocotilos** · 04-23-2010, 03:01 PM

Quote:

What I am trying to do is something similar to the app iFart, it has a scroll wheel and you choose what sound you want them press a button and it plays.

I didn't notice the above sentence.

So basically you need to declare a global variable of int.

Code:

int whatSound = 0;

Then you'd assign whatSound to the value of row. and call the play method based on value of whatSound.

Code:

- (IBAction)go1 {
			
	switch (whatSound) {
             case 0: // do nothing
               break;
             case 1: // play sound 1
               break;
             case 2: // play sound 2
               break;
              default: // do nothing
              break;
       }
			
}


- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
	

	whatSound = row +1;
		

}

go1 is IBAction connected to the button to play the sound.

HTH

tackey123 · 04-23-2010, 03:01 PM

Quote:

Originally Posted by rocotilos

Why do want to put an IBAction inside the void?
It does not work that way.

What event is the IBAction connected to?

The way you have it set up is you select something from the list and it plays a sound, what I want is you have to select a sound from the list then press a button in order for it to play.

The IBAction is connected to a button.

**rocotilos** · 04-23-2010, 03:05 PM

The code u want is given above your last post.

bkl1989 · 04-23-2010, 03:06 PM

Quote:

Originally Posted by tackey123

Yes that works, but I can't put an - (IBAction) inside a - (void). I get errors saying undeclared. I guess the question is really, "how do you put a (IBAction) inside a (void)"

You can't define a function in serial code. If you're having trouble with that concept, you would benefit more from studying the basics than from trying to force your way through an IPhone application. Even if it's mostly interface builder, it's gonna give you hell - try picking up one of the recommended books (listed on a stick in the iphone sdk development forum).
Good luck.

tackey123 · 04-23-2010, 03:10 PM

Quote:

Originally Posted by rocotilos

I didn't notice the above sentence.

So basically you need to declare a global variable of int.

Code:

int whatSound = 0;

Then you'd assign whatSound to the value of row. and call the play method based on value of whatSound.

Code:

- (IBAction)go1 {
			
	switch (whatSound) {
             case 0: // do nothing
               break;
             case 1: // play sound 1
               break;
             case 2: // play sound 2
               break;
              default: // do nothing
              break;
       }
			
}


- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
	

	whatSound = row +1;
		

}

go1 is IBAction connected to the button to play the sound.

HTH

YESSSSSS!!!! thats it thanks!