是调用performSelector的对象：withObject：afterDelay由NSRunLoop保留？ [英] Is object that calls performSelector:withObject:afterDelay get retained by the NSRunLoop?

问题描述

我有一个特定的对象，每X秒执行一次刷新。 （更新程序）
我这样做重复更新的方式是通过调用 performSelector：withObject：afterDelay ，在我的选择器中我重新调度

I have a certain object that perform a "Refresh" every X seconds. ("The Updater") The way I'm doing this repetitive update is by calling performSelector:withObject:afterDelay and in my selector I'm re-scheduling as necessary.

当然，我有一个方法通过调用 cancelPreviousPerformRequests 来停止这些调用。

Of course I have a method to stop these invokations by calling cancelPreviousPerformRequests.

问题是这个Updater永远不会被释放。
只有一个其他对象保留更新程序（AFAIK），保留对象 被释放，并调用 [self setUpdater：nil];

The problem is that this "Updater" is never being deallocated. There is only one other object that retaining the Updater (AFAIK), and the retaining object is being deallocated and calls [self setUpdater:nil];

我怀疑这与 performSelector有关：withObject：afterDelay 方法，但我在文档中找不到对该问题的任何引用。

I'm suspecting that this is have something to do with the performSelector:withObject:afterDelay method, but I couldn't find any reference to that question in the documentation.

任何人都可以确认或关闭它？

Can anyone confirm or dismiss it?

感谢！

附录
这是调度方式：

APPENDIX This are the scheduling methods:

-(void) scheduleProgressUpdate
{
    [self stopProgressUpdates]; // To prevent double scheduling
    [self performSelector:@selector(updateProgress) 
               withObject:nil 
               afterDelay:1.0];
}

-(void) updateProgress
{
    // Perform update..
    [self scheduleProgressUpdate];
}

-(void) stopProgressUpdates
{
    [NSObject cancelPreviousPerformRequestsWithTarget:self 
                                             selector:@selector(updateProgress) 
                                               object:nil];
}

推荐答案

据我所知performSelector方法保留其接收者和参数。

As far as I know the performSelector method retain its receiver and arguments.

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