iOS NSTimer init problem

[aukemid]

I have the following code to start a timer:

self.timer = [NSTimer scheduledTimerWithTimeInterval: (60 / 118)
			target: self
			selector: @selector(timerFiredMethod)
			userInfo: nil
			repeats: YES];

This does not work!
The result of 60 / 118 = 0.5084745763. If I enter this result as interval it does work. Can someone tell me why this is?

 

[Luke Redpath]

If you divide two integers you will get an integer result.

Try 60.0 / 180.0.

 

[chown33]

60 and 118 are integer constants. Therefore, their type is int, and all arithmetic will be performed with integer quantities. So calculated as an integer, 60/118 is 0.

If you want fractional quantities, you must use numbers that have fractional parts, even if the fractional part is 0. A fractional constant is one containing a decimal point. Example: 60.0 / 118.0.

The fractional types are 'double' and 'float'. Here, I use the word "fractional" to mean "capable of representing a fraction". Clearly, the integer types (char, int, long) do not have this capability, or they wouldn't be integer types.

 

[aukemid]

If you divide two integers you will get an integer result.

Try 60.0 / 180.0.

Thanks, that solved it.