NSTimer 与 runloop

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

- (void)multiThread {

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

    

    //此种方式创建的timer已经添加至runLoop

//    [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(timerAction) userInfo:nil repeats:YES];

    

    //此种方式创建的timer没有添加至runLoop

    NSTimer *timer = [NSTimer timerWithTimeInterval:1 target:self selector:@selector(timerAction) userInfo:nil repeats:YES];

    

    //将定时器添加到RunLoop中

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

    

    [pool release];

    

    [[NSRunLoop currentRunLoop] run];

    

    NSLog(@"线程结束");

}

- (void)timerAction {

    NSLog(@"timerAction");

}