如何在iphone sdk中检测空闲用户

In my Application I want to call Logout Function if user is idle for certain amount of time how to accomplish

在我的应用程序中，如果用户空闲了一定时间，我想调用Logout函数

this answer doesn't work for me iPhone: Detecting user inactivity/idle time since last screen touch if i subclass my app delegate class from UIApplication and implement

这个答案对我iPhone不起作用:如果我从UIApplication将我的app委托类子类化并实现，检测用户自上次触摸以来的不活动/空闲时间

- (void)sendEvent:(UIEvent *)event

It gives me error

它给了我的错误

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'There can only be one UIApplication instance.'

I can't find the other instance of UIApplication in my application

我找不到UIApplication的另一个实例

so far i have done

到目前为止，我已经做到了

instead of

而不是

@interface IdleAppDelegate : NSObject <UIApplicationDelegate> {

I have changed it to

我把它改成了

@interface IdleAppDelegate : UIApplication<UIApplicationDelegate> {

and in the main instead of

总的来说

 int retVal = UIApplicationMain(argc, argv, nil, nil);

I've changed it to

我已经改变

int retVal = UIApplicationMain(argc, argv, @"IdleAppDelegate", @"IdleAppDelegate");

Is there anything remaining to do?

还有什么要做的吗?

I'm getting the above error... am I missing something...?

我得到了上面的错误……我少了什么……?

Please Help

请帮助

Thanks

谢谢

2 个解决方案

#1

Your application class is also an application delegate class - that's bad. UIApplicationMain() will create an instance of your custom application subclass, which will then try to an instance of its delegate - which is also an instance of your custom application subclass. You should separate these concerns - yes your custom app subclass needs to subclass UIApplication, but your app delegate should be a separate class that subclasses NSObject.

您的应用程序类也是一个应用程序委托类——这很糟糕。UIApplicationMain()将创建自定义应用程序子类的一个实例，然后该实例将尝试其委托的一个实例——它也是自定义应用程序子类的一个实例。您应该将这些关注点分离——是的，您的自定义应用程序子类需要子类化UIApplication，但是您的应用程序委托应该是一个单独的类，子类NSObject。

#2

Try this out

试一试

-(void)applicationWillResignActive:(UIApplication *)application

{
    NSLog(@"Application not Active");
    // FETCH THE CURRENT TIME 
}