Question

I am implemented some thing in C function and i want to call the another c method using NSTimer method but the selector not worked and also self method not called. How can do that?

 [NSTimer scheduledTimerWithTimeInterval:900 target:self selector:@selector(prepareToUploadLog()) userInfo:nil repeats:YES];

void prepareToUploadLog(void) is another function

Answer 1

According to the documentation of scheduledTimerWithTimeInterval:

aSelector: The message to send to target when the timer fires. The selector must correspond to a method that returns void and takes a single argument. The timer passes itself as the argument to this method.

So you can’t use a C function and have to add an Objective C method that wraps the C function.

- (void)prepareToUpload
{
    prepareToUploadLog();
}