ios 开启线程定时请求某个方法

- (void)startLoop

{

        [ NSThread detachNewThreadSelector:@selector(loopMethod) toTarget:selfwithObject:nil];

}

- (void)loopMethod

{

    [ NSTimer scheduledTimerWithTimeInterval:3.0ftarget:selfselector:@selector(requestIsHaveReview) userInfo:nilrepeats:YES];

    NSRunLoop *loop = [NSRunLoopcurrentRunLoop];

    [loop run];

}

原文：http://blog.csdn.net/alincexiaohao/article/details/38340859