@import ODDispatch;

// Before 
static id singletone;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^(){
 	singletone = [Singletone new];
});

// After
static id singletone;
ODDispatchOnce(^{
	singletone = [Singletone new];
});

// Before 
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
}

// After
ODDispatchAfterInMainThread(2, ^{
});

// Before 
dispatch_async(dispatch_get_main_queue(), ^{
});

// After
ODDispatchAsyncInMainThread(^{
});

// Before 
dispatch_async(dispatch_get_global_queue(priority, 0), ^{
});

// After
ODDispatchAsyncInBackgroundThread(^{
});