1 #import <Foundation/Foundation.h>
2
3 @interface JKTimerManager : NSObject
4
5 + (instancetype)sharedTimerManager;
6
7 /**
8 * 启动一个timer，默认精度为0.1秒
9 *
10 * @param name timer的名称，作为唯一标识
11 * @param timerInterval 执行的时间间隔
12 * @param queue timer将被放入的队列，也就是最终action执行的队列。传入nil将自动放到一个子线程队列中
13 * @param repeats timer是否循环调用
14 * @param action 时间间隔到点时执行的block
15 */
16 - (void)scheduledDispatchTimerWithName:(NSString *)name timeInterval:(NSTimeInterval)timerInterval queue:(dispatch_queue_t)queue repeats:(BOOL)repeats action:(dispatch_block_t)action;
17
18 /**
19 * 撤销某个timer
20 *
21 * @param name timer的名称，唯一标识
22 */
23 - (void)cancelTimerWithName:(NSString *)name;
24
25 /**
26 * 撤销所有timer
27 */
28 - (void)cancelAllTimer;
29
30 @end
1 #import "JKTimerManager.h"
2
3 @interface JKTimerManager ()
4
5 @property (nonatomic,strong) NSMutableDictionary *timerContainer;
6
7 @end
8
9 @implementation JKTimerManager
10
11 + (instancetype)sharedTimerManager {
12 static JKTimerManager *manager = nil;
13 static dispatch_once_t token;
14 dispatch_once(&token, ^{
15 manager = [[JKTimerManager alloc] init];
16 });
17
18 return manager;
19 }
20
21 - (NSMutableDictionary *)timerContainer {
22 if (!_timerContainer) {
23 _timerContainer = [NSMutableDictionary dictionary];
24 }
25 return _timerContainer;
26 }
27
28 - (void)scheduledDispatchTimerWithName:(NSString *)name
29 timeInterval:(NSTimeInterval)timerInterval
30 queue:(dispatch_queue_t)queue
31 repeats:(BOOL)repeats
32 action:(dispatch_block_t)action {
33 if (name == nil)
34 return;
35 if (queue == nil)
36 queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
37
38 dispatch_source_t timer = [self.timerContainer objectForKey:name];
39 if (!timer) {
40 timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue);
41 dispatch_resume(timer);
42 [self.timerContainer setObject:timer forKey:name];
43 }
44
45 dispatch_source_set_timer(timer, dispatch_time(DISPATCH_TIME_NOW, timerInterval * NSEC_PER_SEC), timerInterval * NSEC_PER_SEC, 0.1 * NSEC_PER_SEC);
46 __weak typeof(self) weakSelf = self;
47 dispatch_source_set_event_handler(timer, ^{
48 if (action) {
49 action();
50 if (!repeats) {
51 [weakSelf cancelTimerWithName:name];
52 }
53 }
54 });
55
56 }
57
58 - (void)cancelTimerWithName:(NSString *)name {
59 dispatch_source_t timer = [self.timerContainer objectForKey:name];
60 if (!timer) {
61 return;
62 }
63
64 [self.timerContainer removeObjectForKey:name];
65 dispatch_source_cancel(timer);
66 }
67
68 - (void)cancelAllTimer {
69 for (NSString *name in self.timerContainer.allKeys) {
70 [self cancelTimerWithName:name];
71 }
72 }
73
74 @end
