在 iPhone 锁定屏幕上显示 CFUserNotificationDisplayAlert

发布于 2024-08-20 05:34:50 字数 342 浏览 2 评论 0原文

我正在创建一个应用程序，即使 iPhone 屏幕锁定，也必须显示 CFUserNotificationDisplayAlert，目前我正在使用此代码，

CFOptionFlags responseFlags = 0;
CFUserNotificationDisplayAlert(20.0, 3, NULL, NULL, NULL, CFSTR("Hello"), CFSTR("Hello World"), CFSTR("OK"), NULL, NULL, &responseFlags);

这在主屏幕上效果很好，但如果屏幕锁定，则不会弹出。我还需要添加其他内容才能使其也出现在锁定屏幕上吗？

原文

I m creating an app that has to display CFUserNotificationDisplayAlert even if iPhone Screen is Locked, currently i am using this code

CFOptionFlags responseFlags = 0;
CFUserNotificationDisplayAlert(20.0, 3, NULL, NULL, NULL, CFSTR("Hello"), CFSTR("Hello World"), CFSTR("OK"), NULL, NULL, &responseFlags);

This works great on Home Screen but doesnt pop up if the screen is locked. Is there anything else i have to add to it to make it appear on the Lock Screen as well?

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瘫痪情歌 2024-08-27 05:34:50

您需要使用kCFUserNotificationAlertTopMostKey键。

extern CFStringRef kCFUserNotificationAlertTopMostKey;
CFStringRef keys[] = {
   kCFUserNotificationAlertTopMostKey,
   kCFUserNotificationAlertHeaderKey,
   kCFUserNotificationAlertMessageKey
};
CFStringRef values[] = {
   kCFBooleanTrue,
   CFSTR("Title"),
   CFSTR("Message")
};
CFDictionaryRef dict = CFDictionaryCreate(NULL, keys, values,     
                                          sizeof(keys)/sizeof(*keys),
                                          &kCFTypeDictionaryKeyCallBacks,
                                          &kCFTypeDictionaryValueCallBacks);
SInt32 err = 0;
CFUserNotificationRef notif = CFUserNotificationCreate(NULL,
          0, kCFUserNotificationPlainAlertLevel, &err, dict);
CFRelease(dict);
...

请参阅 http://iphonedevwiki.net/index.php/CFUserNotification 了解所有对话框描述键iPhone 操作系统 ≤ 3.1。

（请注意，虽然它会显示在锁定屏幕上，但手机不会自行唤醒。）

You need to use the kCFUserNotificationAlertTopMostKey key.

extern CFStringRef kCFUserNotificationAlertTopMostKey;
CFStringRef keys[] = {
   kCFUserNotificationAlertTopMostKey,
   kCFUserNotificationAlertHeaderKey,
   kCFUserNotificationAlertMessageKey
};
CFStringRef values[] = {
   kCFBooleanTrue,
   CFSTR("Title"),
   CFSTR("Message")
};
CFDictionaryRef dict = CFDictionaryCreate(NULL, keys, values,     
                                          sizeof(keys)/sizeof(*keys),
                                          &kCFTypeDictionaryKeyCallBacks,
                                          &kCFTypeDictionaryValueCallBacks);
SInt32 err = 0;
CFUserNotificationRef notif = CFUserNotificationCreate(NULL,
          0, kCFUserNotificationPlainAlertLevel, &err, dict);
CFRelease(dict);
...

See http://iphonedevwiki.net/index.php/CFUserNotification for all dialog description keys for iPhone OS ≤ 3.1.

(Note that while it will show on the lock screen, the phone won't wake up by itself.)

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