Question

如何判断controller是被push过来的还是pop过来的

Answer 1

你可能需要描述清楚一点你的需求,这是UInavigationcontroller的属性@property(nonatomic,copy) NSArray *viewControllers; // The current view controller stack.

或者你需要这些方法?
- (NSArray *)popToViewController:(UIViewController *)viewController animated:(BOOL)animated; // Pops view controllers until the one specified is on top. Returns the popped controllers.
- (NSArray *)popToRootViewControllerAnimated:(BOOL)animated; // Pops until there's only a single view controller left on the stack. Returns the popped controllers.