SGSCountdownManager Class Reference 
| Inherits from | NSObject |
| Declared in | SGSCountdownManager.h |
Instance Methods
CountdownTaskExistsByKey:
判断倒计时任务是否存在
- (BOOL)CountdownTaskExistsByKey:(NSString *)keyParameters
- key
倒计时任务标识符
Return Value
YES（存在），NO（不存在）
Declared In
SGSCountdownManager.h
finishCountdownTaskAndInvalidateWithKey:
强制结束倒计时
- (void)finishCountdownTaskAndInvalidateWithKey:(NSString *)keyParameters
- key
倒计时任务标识符
Declared In
SGSCountdownManager.h
scheduledCountdownWithKey:timeInterval:runInBackground:countingHandler:finishedHandler:
- (BOOL)scheduledCountdownWithKey:(NSString *)key timeInterval:(NSTimeInterval)timeInterval runInBackground:(BOOL)runInBackground countingHandler:(nullable void ( ^ ) ( NSTimeInterval timeInterval ))countingHandler finishedHandler:(nullable void ( ^ ) ( __unused NSTimeInterval timeInterval ))finishedHandlerDiscussion
如果需要在后台运行，由于操作系统后台限制， 倒计时时间规定不得大于120秒，除非是音乐播放器或运动类APP
Parameters
- key
倒计时任务标识符
- timeInterval
倒计时总时间
- runInBackground
是否在后台运行
- countingHandler
进行倒计时的Block
- finishedHandler
倒计时结束时的Block
Return Value
YES（成功执行），NO（执行不成功）
Declared In
SGSCountdownManager.h