IOS GCD定时器实现，UITableViewCell 上跑定时器

浏览器搜索IOS GCD定时器会有超级多的文章写这个东西。今天自己实现了一个GCD定时器不用考虑其关闭界面界面或者使用者释放其自动释放。另UITableViewCell 跑定时器丝毫没有问题。核心代码如下

-(NSString *)addTimerWithTimeInterval:(NSTimeInterval)timeInterval

                               target:(id)target

                             selector:(SEL)selector

                             userInfo:(id)userInfo

                              repeats:(BOOL)repeats

                                 fire:(BOOL)fire{

    

    __block  NSString *timerKey = [NSString stringWithFormat:@"%p%@%f%f",target,NSStringFromSelector(selector),timeInterval,[[NSDate date] timeIntervalSinceNow]];

    dispatch_source_t timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, dispatch_get_main_queue());

    [self.timerContainer setObject:timer forKey:timerKey];

    dispatch_time_t start = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.0 * NSEC_PER_SEC));

    uint64_t interval = (uint64_t)(timeInterval * NSEC_PER_SEC);

    dispatch_source_set_timer(timer, start, interval, 0);

    typeof(self) __weak weakSelf = self;

    __weak id weakTarget = target;

    dispatch_source_set_event_handler(timer, ^{

        if (weakTarget && selector && [weakTarget respondsToSelector:selector]) {

            IMP imp = [weakTarget methodForSelector:selector];

            void (*func)(id, SEL,id) = (void *)imp;

            func(weakTarget, selector,userInfo);

            if (!repeats) {

                dispatch_cancel(timer);

                [weakSelf.timerContainer removeObjectForKey:timerKey];

            }

        }else{

            dispatch_cancel(timer);

            [weakSelf.timerContainer removeObjectForKey:timerKey];

        }

    });

    

    if (fire) {

        dispatch_resume(timer);

    }

    return timerKey;

}

Github 地址： https://github.com/ZXLBoaConstrictor/ZXLGCDTimer 用着还行的话给个star