observeValueForKeyPath未被调用 [英] observeValueForKeyPath not being called

问题描述

我有一个ViewController创建一个UIView的实例，然后我用实例注册一个观察者，这样

I have a ViewController creating an instance of a UIView, and then I register an observer with the instance, such that

logoAnimation = [[MainLogoAnimation alloc] init];
[logoAnimation addObserver:self forKeyPath:@"patrocinioDidLoad" options:(NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOld) context:nil];

然后，在同一个文件中，我有：

then, in the same file, I have:

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
 NSLog(@"%@ \n %@ \n %@ \n ",keyPath,object,change);
}

但是，虽然我已经检查并仔细检查过logoAnimation.patrocinioDidLoad已更改，observeValueForKeyPath永远不会被调用...

But, although I have checked and double-checked that logoAnimation.patrocinioDidLoad has changed, observeValueForKeyPath never gets called...

我错过了什么吗？

感谢您的帮助！

安东尼奥

推荐答案

解决它：
我正在设置patrocinioDidLoad直接在logoAnimation中，不使用标准的getter和setter。在logoAnimation中，

Solved it: I was setting patrocinioDidLoad in logoAnimation directly, without using standard getters and setters. In logoAnimation,

patrocinioDidLoad = YES;

不起作用，而

self.patrocinioDidLoad = YES;

do！

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