NSThread 创建的三种方式:

     // 创建线程  object是传给方法的参数        NSThread *thread = [[NSThread alloc] initWithTarget:self selector:@selector(run:) object:@"jack"];        // 启动线程        [thread start];复制代码

//不需要alloc  start 来创建子线程[NSThread detachNewThreadSelector:@selector(run:) toTarget:self withObject:@"rose"];复制代码

//不显示NSThread 来创建子线程[self performSelectorInBackground:@selector(run:) withObject:@"jack"];复制代码