#import <UIKit/UIKit.h>
#import "UCMapviewController.h"
#import "UCMenuviewController.h"
#import "UCOverviewController.h"

@interface UCRootViewController : UIViewController

@property (weak,nonatomic) UCMapviewController *mapviewController;
@property (weak,nonatomic) UCMenuviewController *menuviewController;
@property (weak,nonatomic) UCOverviewController *overviewController;

这是我的UCRootViewController的声明,它应该管理这些子viewControllers.他后来也将成为他们的代表,以便在何时应该显示一个控制器时进行处理.

rootViewController在UIAppDelegate中保持强大,并将一直保持活动状态.

那么使这些子视图控制器变弱是否正确？我不是100％肯定,但据我所知,当没有强指针指向它们时,弱指针会被释放.因为根很强大,让它们变弱是正确的,对吗？

#import <UIKit/UIKit.h>

@class UCRootViewController;
@interface UCOverviewController : UIViewController

@property (weak,nonatomic) UCRootViewController *rootviewController;

这是我的一个子viewControllers的标题.它们有一个指向(稍后)委托rootviewController的弱指针.是否足以声明@class UCRootviewController使它们调用委托方法？我甚至需要这个吗？

谢谢

编辑：我刚读了a nice article about ViewControllers和段落：

Always use high-quality view controller containers or
+[UIViewController presentModalViewController:animated:] to display view controllers in your application. If you need to keep a reference
to a view controller somewhere,use a weak reference,except if you
really want it to stay alive longer for caching purposes. In such
cases,be sure to correctly respond to low-memory conditions.

它说使用弱参考,你对此有何看法？