如何在 OS XC 代码中创建异步计时器？

import Foundation

func createAsyncTimer(interval: DispatchTimeInterval, block: @escaping () -> Void) {
    let timer = DispatchTimer.scheduledTimer(withTimeInterval: interval, repeats: false) { _ in
        block()
    }
    
    // 在需要停止计时器时，使用以下代码：
    timer.invalidate()
}

let interval = DispatchTimeInterval.seconds(1)
createAsyncTimer(interval: interval, block: {
    print("Timer Fired")
})

#import <Foundation/Foundation.h>

void createAsyncTimer(dispatch_time_t interval, dispatch_block_t block) {
    dispatch_source_t timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0);
    dispatch_source_set_timer(timer, interval, 0);
    dispatch_source_set_event_handler(timer, block);
    dispatch_resume(timer);
    
    // 在需要停止计时器时，使用以下代码：
    dispatch_source_cancel(timer);
}

dispatch_time_t interval = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0 * NSEC_PER_SEC));
createAsyncTimer(interval, ^{
    NSLog(@"Timer Fired");
});