无法识别的选择器已发送到实例

Question

So I'm looking around stack overflow, I see a lot of these unrecognized selector sent to instance error messages. Some ARC related, most non ARC related. What I essentially I am doing is calling a NSTimer to call a method every 6 seconds to change the file path of the array for a photo. (An automated banner if you will.) When 6 seconds has passed, I get this error message:

2014-07-10 11:04:35.152 ysysy[435:57924] -[TableViewController animateFunction]: unrecognized selector sent to instance 0x156989f0
2014-07-10 11:04:35.154 ysysy[435:57924] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[TableViewController animateFunction]: unrecognized selector sent to instance 0x156989f0'

I call a setBannerTimer method inside of the viewWllAppearMethod:

[self performSelectorOnMainThread:@selector(setBannerTimer) withObject:nil waitUntilDone:NO];

setBannerTimer then triggers a string method called animate function every 6 seconds:

- (void) setBannerTimer {


    self->bannerTimer = [NSTimer scheduledTimerWithTimeInterval:6 target:self selector:@selector(animateFunction) userInfo:nil repeats:YES];
    }

Animatie function:

 +(NSString *)animateFunction

return photoPath;
}

Hopefully I laid my problem out for everyone to easily understand. I must be doing something syntactically wrong with my method right? I am so close! Thanks ahead of time!

Answer 1

It's not about ARC, scheduledTimerWithTimeInterval:target:selector:userInfo:repeats should have an instance method selector, not a class method one;

=> Call a

- (NSString *)animateFunction

instead of a

+ (NSString *)animateFunction