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How to control “the system audio volume” of iOS

Author: h.mohri

Use C++Builder 10.2 to control audio volume of iOS.
I used the MPVolumeView class of iOS.
The MPVolumeView class is declared in “iOSapi.MediaPlayer.hpp”.

Include two files.

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Form design

Arrange “Up” and “Down” two TButton. Use this button to control the volume.

Add MPVolumeView to the main form Class

Add “_di_MPVolumeView” and “_di_UISlider” to the form class.

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Main Form constructor

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Code of volume down button

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Code of volume up button

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Execute the program.

With Rad’s Studio Native Ios App builder, you can make apps on macOS & Ios in the Delphi or C++ environments. Try the free tool here.
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