区分iOS7上的屏幕锁定和主页按钮按下 [英] Differentiate between screen lock and home button press on iOS7

问题描述

我需要在 applicationDidEnterBackground 中做一些事情.但我需要区分哪些用户操作会导致进入背景":屏幕锁定或主页按钮按下.

I need to do something in applicationDidEnterBackground. But I need to differentiate which user action causes the "enter background": screen lock or home button press.

我正在使用此代码，该代码来自此帖子 - 如何区分 iOS5 上的屏幕锁定和主页按钮按下?:

I was using this code, which is from this post - How to differentiate between screen lock and home button press on iOS5?:

UIApplicationState state = [application applicationState];
if (state == UIApplicationStateInactive) {
    NSLog(@"Sent to background by locking screen");
} else if (state == UIApplicationStateBackground) {
    NSLog(@"Sent to background by home button/switching to other app");
}

它在 iOS6 上运行良好.但是在 iOS7(设备和模拟器)上，我总是得到 UIApplicationStateBackground，无论用户点击主页还是锁定按钮.

It works fine on iOS6. but on iOS7 (both device and simulator), I always get UIApplicationStateBackground, whether the user clicks the home or the lock button.

有人知道是什么导致了这种情况吗?iOS 7 更新多任务后台处理?或者我的应用程序的某些设置(我的应用程序的后台模式已关闭)?

Does someone have an idea about what could cause this? iOS 7 updates to multi-task background handling? Or some setting of my app (my app's background mode is off)?

还有其他解决方案吗?

推荐答案

这可以帮助你在 iOS6 和iOS7 :).

This can help you both on iOS6 & iOS7 :).

当用户按下锁定按钮时，您将收到 com.apple.springboard.lockcomplete 通知.

When user press lock button you will get a com.apple.springboard.lockcomplete notification.

//new way
//put this in - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),
                                    NULL,
                                    displayStatusChanged,
                                    CFSTR("com.apple.springboard.lockcomplete"),
                                    NULL,
                                    CFNotificationSuspensionBehaviorDeliverImmediately);

//put this function in AppDelegate
static void displayStatusChanged(CFNotificationCenterRef center,
                                 void *observer,
                                 CFStringRef name,
                                 const void *object,
                                 CFDictionaryRef userInfo) {
    if (name == CFSTR("com.apple.springboard.lockcomplete")) {
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"kDisplayStatusLocked"];
        [[NSUserDefaults standardUserDefaults] synchronize];
    }
}

//put this in onAppEnterBackground
UIApplicationState state = [[UIApplication sharedApplication] applicationState];
    if (state == UIApplicationStateInactive) {
        NSLog(@"Sent to background by locking screen");
    } else if (state == UIApplicationStateBackground) {
        if (![[NSUserDefaults standardUserDefaults] boolForKey:@"kDisplayStatusLocked"]) {
            NSLog(@"Sent to background by home button/switching to other app");
        } else {
            NSLog(@"Sent to background by locking screen");
        }
    }

//put this in - (void)applicationWillEnterForeground:(UIApplication *)application
[[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"kDisplayStatusLocked"];
[[NSUserDefaults standardUserDefaults] synchronize];

CGFloat screenBrightness = [[UIScreen mainScreen] brightness];

NSLog(@"Screen brightness: %f", screenBrightness);

UIApplicationState state = [[UIApplication sharedApplication] applicationState];

if (state == UIApplicationStateInactive) {

    NSLog(@"Sent to background by locking screen");

} else if (state == UIApplicationStateBackground) {
    if (screenBrightness > 0.0) {
        NSLog(@"Sent to background by home button/switching to other app");
    } else {
        NSLog(@"Sent to background by locking screen");
    }
}

这篇关于区分iOS7上的屏幕锁定和主页按钮按下的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！