每次开启一个DISPATCH_QUEUE需要三四分钟。我需要一个按钮可以终止队列。怎么实现?
dispatch_sync(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
@synchronized(self)
{
for (int i = 0; i < (4000); i++) {
(Some methods)
}
}
});
能否终止或取消此线程?