IOS在子线程中使用定时器，将定时器添加至RunLoop中（转）

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}