我的 viewController 更新有问题吗？
我只是给你一个我的问题的例子：-
我已经实现了这个方法：
-(void)viewWillAppear:(BOOL)animated {
NSLog(@"update");}
在我的viewController中，但它随时被调用，我如何手动调用它？
提前致谢...
I just give u example of my problem:-
I have implemented this method:
-(void)viewWillAppear:(BOOL)animated {
NSLog(@"update");}
inside my viewController, but it's called anytime, how I can call it manually?
Thanks in advance...
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[self viewWillAppear:YES];如果您已经在对象中。[self viewWillAppear:YES];if you are in the object already.直接调用该方法是不正确的，因为您必须在其中执行
[super viewWillAppear:animated];。此方法是在视图出现之前进行所有必要的设置。您不知道超类进行什么样的设置。因此，最好将您想要重用的代码部分打包到不同的方法中，并从viewWillAppear:方法和您想要调用它的另一个方法中调用它。It wouldn't be right to call that method directly as you are bound to do
[super viewWillAppear:animated];within it. This method is to do all the necessary set up just before the view will appear. You don't know what kind of setup thesuperclassdoes. So it is better to package the part of code that you want to reuse into a different method and call it from both theviewWillAppear:method and the other method that you want to call it from.