子线程中执行定时器

转：http://my.oschina.net/u/936286/blog/159490

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

02

{

03	self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];

04

05	//用NSObject的方法创建一个多线程

06	[self performSelectorInBackground:@selector(multiThread) withObject:nil];

07

08	self.window.backgroundColor = [UIColor whiteColor];

09	[self.window makeKeyAndVisible];

10	return YES;

11

}

12	- (void)multiThread

13

{

14	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

15	if (![NSThread isMainThread]) {

16

17

// 第1种方式

18	//此种方式创建的timer已经添加至runloop中

19	//        [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(timerAction) userInfo:nil repeats:YES];

20	//保持线程为活动状态，才能保证定时器执行

21	//        [[NSRunLoop currentRunLoop] run];//已经将nstimer添加到NSRunloop中了

22

23

//第2种方式

24	//此种方式创建的timer没有添加至runloop中

25	NSTimer *timer = [NSTimer timerWithTimeInterval:1.0f target:self selector:@selector(timerAction) userInfo:nil repeats:YES];

26	//将定时器添加到runloop中

27	[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];

28	[[NSRunLoop currentRunLoop] run];

29	NSLog(@"多线程结束");

30

}

31	[pool release];

32

}

33

34	- (void)timerAction

35

{

36	//定时器也是在子线程中执行的

37	if (![NSThread isMainThread]) {

38	NSLog(@"定时器");

39

}

40

}