Obj-c Expression error - Invalid operands to binary expression ('CGFloat' (aka 'double’))

Question

I have reviewed same types of questions over stack overflow but this is different. Here i want to modulo double value with integer. And compiler is giving below error.

I need to get modulo value of scrollview content offset. For that i have written below code but it is giving me error 'Invalid operands to binary expression ('CGFloat' (aka 'double'))'. Any one please help.

scrollView.contentOffset.x % 1024.00;

Thanks in advance.

the simpler solution is this: `(int) scrollView.contentOffset.x % (int)1024.00;`. From what i saw you cant use that operation on float/double — rob180, Dec 01 '15 at 15:17

score 7 · Accepted Answer · edited Dec 02 '15 at 11:00

7

The Modulo operator % works only with integers.

You could cast the value(s) to int.

(int)scrollView.contentOffset.x % 1024;

edited Dec 02 '15 at 11:00

ivan_pozdeev

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answered Dec 01 '15 at 15:17

vadian

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score 3 · Answer 2 · answered Dec 01 '15 at 15:17

3

You should use fmod(). Manpage.

CGFloat remainder = fmod(scrollView.contentOffset.x, 1024.00);

answered Dec 01 '15 at 15:17

trojanfoe

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Obj-c Expression error - Invalid operands to binary expression ('CGFloat' (aka 'double’))

2 Answers2