KVO上的iphone..如何从ViewWillExample方法调用observeValueForKeyPath方法？

以下是我的资料

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
    if ([object isKindOfClass:[UIAccelerometer class]]) {   
    NSNumber *interfaceValue = [change objectForKey:NSKeyValueChangeNewKey];
    UIInterfaceOrientation toInterfaceOrientation = [interfaceValueintValue];           
    //here is my code....   
    }

---

如果我理解正确，您希望在keyValue更改时执行某些代码，并且您还希望在viewwillbeen中执行此代码。不要试图通过编程方式触发KVO方法，只需创建一个单独的函数，您可以从两个位置调用该函数：

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
    [self myKeyValueObservationMethod];
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    [self myKeyValueObservationMethod];
}

- (void)myKeyValueObservationMethod {
    // here is my code....
}

如果我完全没有注意到，请编辑您的问题，并在您对问题的解释中添加更多细节