perform selector with blocks

NSObject+TCBlocks.h

typedef void(^TCVoidBlock)(void);

@interface NSObject (TCBlocks)

- (void)performBlock:(TCVoidBlock)block afterDelay:(NSTimeInterval)delay;
- (void)performBlockInBackground:(TCVoidBlock)block;
- (void)performBlockOnMainThread:(TCVoidBlock)block waitUntilDone:(BOOL)wait;

@end

NSObject+TCBlocks.m

#import "NSObject+TCBlocks.h"

@implementation NSObject (TCBlocks)

- (void)performBlock:(TCVoidBlock)block
{
    block();
}

- (void)performBlock:(TCVoidBlock)block afterDelay:(NSTimeInterval)delay
{
    [self performSelector:@selector(performBlock:) withObject:[block copy] afterDelay:delay];
}

- (void)performBlockInBackground:(TCVoidBlock)block
{
    [self performSelectorInBackground:@selector(performBlock:) withObject:[block copy]];
}

- (void)performBlockOnMainThread:(TCVoidBlock)block waitUntilDone:(BOOL)wait
{
    [self performSelectorOnMainThread:@selector(performBlock:) withObject:[block copy] waitUntilDone:wait];
}

@end