如何通过调高音量按钮拍照并在iOS中显示任何弹出窗口？

Question

I'm using JPSVolumeButtonHandler, but in this I got the volume up button action. But in this ringer and volume button popup is showing. How to take picture?

Answer 1

From iOS 8 you can add an observer to the notification

_UIApplicationVolumeUpButtonDownNotification

[[NSNotificationCenter defaultCenter] addObserver:self
                                  selector:@selector(volumeChanged:)
                                  name:@"_UIApplicationVolumeUpButtonDownNotification"
                                  object:nil];

If you are using UIImagePickerController , you able to capture the event and use it to call TakePicture with a custom view.

On top of that, UIImagePickerController ensures that pressing volume up won't change the volume.

Or you can use thirdparty library like, JPSVolumeButtonHandler .

Update :

you can do something like,

MPVolumeView *volumeView = [[MPVolumeView alloc] initWithFrame: CGRectZero];
[self.view addSubview: volumeView];

Don't forget to @import MediaPlayer;

refer this Apple documentation for more detail.

Hope this will help :)