How do you use the iPhone Reachability Notifications
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How to check for an active Internet connection on iOS or macOS?
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Accessing the iPhone's Call log with the iPhone SDK
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Notification after an address book contact gets updated/modified in iOS
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How much delay of ios push notification?
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What words trigger the screen effects in iMessage?
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iPhone Proximity Sensor
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iPhone 4s: I keep receiving notifications over 3G for apps that I've disabled cell data for
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Alternatives to dispatch_get_current_queue() for completion blocks in iOS 6?
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How to get the status of bluetooth (ON/OFF) in iphone programmatically
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Get push notification while App in foreground iOS
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NSNotification VS KVO
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Two-finger swipe 'breaks' heads-up notifications on Lollipop?
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See notification of other app
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get facebook likes count in iphone-sdk
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How to disable all iOS notifications temporarily while actively using/mirroring the device?
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iOS 12 tapping on notification to open app not working
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How to startForeground() without showing notification?