RemoveFromSuperview 发送无法识别的选择器到视图控制器
我有一个名为 GobanVC 的视图控制器。它添加一个子视图来实现放大效果。这工作正常，但是当我调用removeSuperview来摆脱它时，我收到无法识别的选择器错误：
2010-08-26 10:10:04.014 GoGrinder[4257:207] -[GobanVC _invalidateSubviewCache]: unrecognized selector sent to instance 0x5a2f540
2010-08-26 10:10:04.016 GoGrinder[4257:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[GobanVC _invalidateSubviewCache]: unrecognized selector sent to instance 0x5a2f540'
GobanVC是UIViewController子类，而不是视图，所以我不确定为什么它会收到此消息。我添加这样的子视图：
if(magnifier == nil)
{
magnifier = [[MagnifierView alloc] initWithFrame:gobanView.bounds];
magnifier.viewref = gobanView;
[gobanView addSubview:magnifier];
}
gobanView 是一个 UIView IBOutlet。
在touchesEnded中，我尝试像这样删除子视图：
if(magnifier != nil)
{
[magnifier removeFromSuperview];
[magnifier release];
magnifier = nil;
}
有什么想法吗？似乎 _invalidateSubviewCache 应该发送到视图的父视图，即 UIView。我不明白为什么要打电话给 VC。
更新：
gobanVC.view 是 gobanView 的父级。我使用IB添加了一个子视图，gobanView是它连接到的IBOutlet。
I have a view controller called GobanVC. It's adding a subview to do a magnification effect. That works fine, but when I call removeSuperview to get rid of it, I get an unrecognized selector error:
2010-08-26 10:10:04.014 GoGrinder[4257:207] -[GobanVC _invalidateSubviewCache]: unrecognized selector sent to instance 0x5a2f540
2010-08-26 10:10:04.016 GoGrinder[4257:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[GobanVC _invalidateSubviewCache]: unrecognized selector sent to instance 0x5a2f540'
GobanVC is a UIViewController subclass, not a view, so I'm not sure why it's receiving this message. I'm adding the subview like this:
if(magnifier == nil)
{
magnifier = [[MagnifierView alloc] initWithFrame:gobanView.bounds];
magnifier.viewref = gobanView;
[gobanView addSubview:magnifier];
}
gobanView is a UIView IBOutlet.
In touchesEnded I try to remove the subview like this:
if(magnifier != nil)
{
[magnifier removeFromSuperview];
[magnifier release];
magnifier = nil;
}
Any ideas? It seems like _invalidateSubviewCache should be sent to the parent of the view, which is a UIView. I don't see why the VC is getting called instead.
Update:
gobanVC.view is the parent of gobanView. I added a child view using IB, and gobanView is the IBOutlet it is connected to.
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很有趣。我假设 GobanVC.view == gobanView ？看起来幕后正在发生一些复杂的事情，可能需要进行一些仔细的梳理才能弄清楚 magnifier 如何获得对 GobanVC 的引用。也许 gobanView 实际上包含对 gobanVC 的引用？
我不知道您愿意在这里显示多少代码，但如果可以的话，请显示尽可能多的 .m 代码，以便我们其他人可以看一下。 UIViewController 视图加载的计时存在一些不直观的问题，因此查看所有代码会很有帮助。
Pretty interesting. I'm assuming
GobanVC.view == gobanView? It seems like something convoluted is going on behind the scenes, and it'll probably take some fine combing to figure out how magnifier could possibly get a reference to GobanVC. Maybe gobanView actually contains a reference to a gobanVC?I don't know how much code you're willing to show on here, but if you can, show as much of .m as possible so the rest of us can take a look. There are some unintuitive issues with timing in UIViewController view loading, so having all the code to look at helps a ton.