NSTimer problem

[noobCoder]

Hi all,

I have a quick problem I am hoping somebody could help me with, I am trying to refresh a view background at a User determined speed through the use of an NSTimer.

I have a TextView that you can enter a value, I then convert this to an integer and pass it to the NSTimer which in turn calls a method which updates the background as follows.

timerBackground = [NSTimer scheduledTimerWithTimeInterval:TEXTVIEWVALUE
target:self
selector:@selector(methodCall)
userInfo:nil
repeats:YES];

but the value I am trying to set seems sporadic and not updating at a speed which it should be.

Anybody see what I am doing wrong?

Thanks

[Duncan C]

Originally Posted by noobCoder

Hi all,

I have a quick problem I am hoping somebody could help me with, I am trying to refresh a view background at a User determined speed through the use of an NSTimer.

I have a TextView that you can enter a value, I then convert this to an integer and pass it to the NSTimer which in turn calls a method which updates the background as follows.

timerBackground = [NSTimer scheduledTimerWithTimeInterval: TEXTVIEWVALUE
target:self
selector:@selector(methodCall)
userInfo:nil
repeats:YES];

but the value I am trying to set seems sporadic and not updating at a speed which it should be.

Anybody see what I am doing wrong?

Thanks

The code you posted looks fine, ignoring some style issues.

Why don't you add a log statement to display the value of TEXTVIEWVALUE before you set up the timer:

NSLog(@"Timer value = %f", (float) TEXTVIEWVALUE);
timerBackground = [NSTimer scheduledTimerWithTimeInterval: TEXTVIEWVALUE
                                                      target:self
                                                      selector:@selector(methodCall)
                                                      userInfo:nil
                                                      repeats:YES];

Time intervals are floating point values expressed in seconds.
By the way, Cocoa variable names begin with a lower case letter by convention. Then the first letter of each word in a variable name is usually capitalized.

Labels that begin with upper case are supposed to be class names. Most people use all upper case for constants.

So your variable name should be "textViewValue".

[noobCoder]

Thanks for your reply Duncan.

I just had the fields in all uppercase to show what I had changed from the original template the NSTimer function gives.

I am outputting to the Log file and the float value seems to be always assigned 0.0 which seems strange.

[Duncan C]

Originally Posted by noobCoder

Thanks for your reply Duncan.

I just had the fields in all uppercase to show what I had changed from the original template the NSTimer function gives.

I am outputting to the Log file and the float value seems to be always assigned 0.0 which seems strange.

So your bug is elsewhere than the code you posted. Work your way back and figure out why you're not getting the value you expect.

BTW, I suggest using the bold tag in the message editor to mark code rather than upper-casing it. C code is case-sensitive, after all. I wish it wasn't, but there you go.

[noobCoder]

After going back through the code I have found that the integer value seems to always be assigned to a really high number i.e. around 18000, when in theory I am only writing the numbers 1 through 10 in the text box for testing. Starting to baffle me a little.

I will persist with another approach though. Thanks for your help so far




Since going through my code I have found the answer out, Thanks again for your help

[Duncan C]

Originally Posted by noobCoder

After going back through the code I have found that the integer value seems to always be assigned to a really high number i.e. around 18000, when in theory I am only writing the numbers 1 through 10 in the text box for testing. Starting to baffle me a little.

I will persist with another approach though. Thanks for your help so far




Since going through my code I have found the answer out, Thanks again for your help

Sounds like a type mismatch problem. Try casting your value to a double before passing it to the NSTimer.