Question

I’m having one error and one warning concerning the usage of the ‘GetTiming()’ function. My colde is as follows:

[values addObject:[NSNumber numberWithFloat:25.0]];
[timings addObject:GetTiming(kCAMediaTimingFunctionEaseIn)];
[keytimes addObject:[NSNumber numberWithFloat:0.0]];

I am importing the following:

#import <QuartzCore/CAAnimation.h>
#import <QuartzCore/CAMediaTimingFunction.h>

The error I suppose is due to the fact that I’m using ARC, and says:

implicit conversion of 'int' to 'id' is disallowed with ARC.

I tried to disable ARC in the concerning file but the error persists.

About the warning, it says:

implicit declaration of function 'GetTiming' is invalid in C99

Any one have any ideas on how can I fix these issues?
Thanks a lot!

Answer 1

First make sure that the GetTiming function exists (include the right header). Now if GetTiming returns an int the problem is you can not add a primitive value to an array. You need to wrap the value returned in an NSNumber.

[timings addObject:
    [NSNumber numberWithInt:GetTiming(kCAMediaTimingFunctionEaseIn)]];

Edit:

You are missing the function that was declared in JackController.m.

CAMediaTimingFunction* GetTiming(NSString* name) {
    return [CAMediaTimingFunction functionWithName:name];
}

For simplicity do not use that function, just create it directly.

[timings addObject:
    [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn]];