iOS 在闲置一段时间后执行指定动作

iOS 在闲置一段时间后执行指定动作

kevin_han 制作于 2015-09-05

1. 新建 Objective-C 类，继承 UIApplication。

2. 编辑 .h 如下

#import 

#define kApplicationTimeoutInMinutes 5
#define kApplicationDidTimeoutNotification @"APPSurplusGoods"

@interface APPSurplusGoods : UIApplication {

    NSTimer *myidleTimer;
}

-(void)resetIdleTimer;  

@end

3. 编辑 .m 如下：

#import "APPSurplusGoods.h"

@implementation APPSurplusGoods

// 监听所有触摸，当屏幕被触摸，时钟将被重置
-(void)sendEvent:(UIEvent *)event {

    [super sendEvent:event];

    if (!myidleTimer) [self resetIdleTimer];

    NSSet *allTouches = [event allTouches];

    if ([allTouches count] > 0) {

        UITouchPhase phase= ((UITouch *)[allTouches anyObject]).phase;

        if (phase == UITouchPhaseBegan) {

            [self resetIdleTimer];
        }
    }
}

//重置时钟
-(void)resetIdleTimer {

    if (myidleTimer) [myidleTimer invalidate];

    //将超时时间由分钟转换成秒数
    int timeout = kApplicationTimeoutInMinutes * 60;

    myidleTimer = [NSTimer scheduledTimerWithTimeInterval:timeout target:self selector:@selector(idleTimerExceeded) userInfo:nil repeats:NO];
}

//当达到超时时间，发送APPSurplusGoods通知
-(void)idleTimerExceeded {

    [[NSNotificationCenter defaultCenter] postNotificationName:@"APPSurplusGoods" object:nil];
}

@end

4. 修改 main.m :

#import 
#import "AppDelegate.h"
#import "APPSurplusGoods.h"

int main(int argc, char *argv[]) {

    @autoreleasepool {

        return UIApplicationMain(argc, argv,NSStringFromClass([APPSurplusGoods class]),NSStringFromClass([AppDelegate class]));

    }
}

5. 接下来编辑 AppDelegate.m 文件，不需要编辑 AppDelegate.h。

#import "AppDelegate.h"

@interface AppDelegate ()

@property (nonatomic,assign) BOOL idle;

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationDidTimeout:) name:@"APPSurplusGoods" object:nil];

    return YES;
}

-(void)applicationDidTimeout:(NSNotification *)notif {

    NSLog (@"time exceeded!!");

    //这是故事板和xib文件不同的地方。对于你想跳转到的 View Controller，确保下面代码中的id 和故事板中 View Controller 的 Storyboard Identifier 一致。在本例中，即"mainView"。而我的故事板文件名为MainStoryboard.storyboard, 确保你的文件名和 storyboardWithName 参数保持一致。

    UIViewController *controller = [[UIStoryboard storyboardWithName:@"MainStoryboard" bundle:NULL]instantiateViewControllerWithIdentifier:@"mainView"];

    [(UINavigationController *)self.window.rootViewController pushViewController:controller animated:YES];

}

-(void)idleTimerExceeded{

    AppDelegate *appdelegate = [[UIApplication sharedApplication] delegate];

    if(appdelegate.idle){

        [[NSNotificationCenter defaultCenter] postNotificationName:@"APPSurplusGoods"

         object:nil];
    }
}