Checking value of a text box

[kiambogo]

Hey everyone,

I have a text box in an app i am making. The user inputs a number into the text box and it does some stuff from there. Anyways, I want the user to only input numbers 1-12, not higher. How should I input code so that if they inputted a number higher then 12, then an alert message pops up and tells them to put a number lower then 12 in. I have attempted and failed with this code:

-(void)sidesOfPolygons:(id)sender{
	NSString *msg = nil;
	if (polygonsSides.text > 12) 
		msg = @"Please choose a number between 1 and 12.";
	NSLog(@"MSG worked, moving on to the alert.");
		UIAlertView *alert = [[UIAlertView alloc]
							  initWithTitle:@"Area of Polygons"
							  message:msg
							  delegate:self
							  otherButtonTitles:nil];
		[alert show];
		[alert release];
		[msg release];
		}

I would also like the text box to clear after the message.
Any help is greatly appreciated.

Thanks,
kiambogo

[WillSDev]

I may be wrong, but i dont think you can see if a number (int) is less than a label, because the label isnt an int.

do something like this:

int pSides = polygonsSides.text;

-(void)sidesOfPolygons:(id)sender{
	NSString *msg = nil;
	if (pSides > 12) 
		msg = @"Please choose a number between 1 and 12.";
	NSLog(@"MSG worked, moving on to the alert.");
		UIAlertView *alert = [[UIAlertView alloc]
							  initWithTitle:@"Area of Polygons"
							  message:msg
							  delegate:self
							  otherButtonTitles:nil];
		[alert show];
		[alert release];
		[msg release];
		}

HTH

[kiambogo]

Thanks for the quick reply,

I get two warnings though. First, is about the 'int pSides = polygonsSides.text'
The message says "warning: initializaition makes integer from pointer without a cast." the second message is about 'otherButtonTitles:nil];' the message is "warning: no '-initWithTitle:message:delegatetherButtonTitles:' method found"

Any help to solve these problems is appreciated.

Thanks,
kiambogo

[WillSDev]

check out this example:
http://www.aniphonecoder.com/30-days/GetLetter.zip

[kiambogo]

Originally Posted by WillSDev

check out this example:
http://www.aniphonecoder.com/30-days/GetLetter.zip

Thanks for the input. This has helped me quite a bit. However, I am still stuck trying to figure out how to set a string as a value of integers between 12 and 100. I just need to know what to put. As of now, I have this:

NSString *higher12 = [int => 12];
	if([polygonsSides.text isEqualToString:higher12])
	{

Everything else works besides this.

Any help is greatly appreciated!

Thanks,
kiambogo

[WillSDev]

my only idea is to make an int
like: myInt => 12

then make it a string like:
NSString *higher12 = [NSString stringWithFormat:@"%d", myInt];

then your if statement here

[kiambogo]

Originally Posted by WillSDev

my only idea is to make an int
like: myInt => 12

then make it a string like:
NSString *higher12 = [NSString stringWithFormat:@"%d", myInt];

then your if statement here

Thanks for your input. I get one error message on

int *myInt => 12;

The error says "expected expression before '>' token".

Any idea what to do?

Thanks,
kiambogo

[Davcom]

Originally Posted by kiambogo

Thanks for your input. I get one error message on

int *myInt => 12;

The error says "expected expression before '>' token".

Any idea what to do?

Thanks,
kiambogo

You need to convert that textbox text to a number first like this : textbox.text.integerValue

Now , you can use that in your like if(textbox.text.integerValue > 100)..etc