With the skills you have learned in this chapter, you have the foundation to sta
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With the skills you have learned in this chapter, you have the foundation to start taking advantages of using the hardware features of the user's device in your own apps. when you do so, be careful to check for the availability of sensors on the device and turn off sensors when not needed to avoid draining the battery. For most of the examples in this chapter, it is necessary so have a physical device for testing, because the simulator doesn't simulate most of the hardware sensors. Make sure the camera button shows up only on devices that support a camera. Make sure the camera button is shown and hidden appropriately when the user changes between edit and view modes. Implement a long-press recognizer for the cell phone field, but instead of calling the number, send a message. Create a new Single-view project and use the accelerometer data to create a simple game where the player gets points by tapping a button that can be moved around the screen by tilting the device. Add three sliders and use them to display the accelerometer data in all three dimensions in real-time.Explanation / Answer
If your photos are blurred, out of focus, or have dark spots, try these steps:
If you still have issues with the focus on your camera, contact Apple Support.
Use Control Center to test the LED flash. Turn the flashlight off and on. If the LED flash doesn't work as a flashlight, contact Apple Support.
If the flash isn’t working, or it goes off every time you take a photo, check your flash settings. Tap in the upper left of the screen to choose a different setting.
If you take extended video with the flash on, or you’re using the device in a very warm environment, you might see a message that says the flash is disabled. The message remains until your device cools down.
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