Tips: a solid dealloc for all classes

BaseViewController.m

#import <objc/runtime.h>

@implementation BaseViewController()

- (void)dealloc
{
    [CATransaction setCompletionBlock:nil];
    [NSObject cancelPreviousPerformRequestsWithTarget:self];
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    
	if ([self respondsToSelector:@selector(setDelegate:)])
        	[self performSelector:@selector(setDelegate:) withObject:nil];
    
	// invalidate timers
    unsigned int count = 0;
    objc_property_t *properties = class_copyPropertyList([self class], &count);
    for (int i = 0; i < count; ++i) {
        NSString *name = [NSString stringWithCString:property_getName(properties[i]) encoding:NSUTF8StringEncoding];
        id prop = [self valueForKey:name];
        if ([prop respondsToSelector:@selector(invalidate)])
            [prop invalidate], prop = nil;
    }

	[super dealloc]; // not needed in ARC
}

@end