How to know I tap “taking photo button” with UIImagePicker

问题

There are three delegate method with UIImagePickerDelegate.

(void)imagePickerController:(UIImagePickerController *)picker 
didFinishPickingMediaWithInfo:(NSDictionary *)info;

This method tell you the piture you take. But when I tap the "taking photo button", how I know the event?

回答1:

You should

1) subclass UIImagePickerController

2) set showCameraControls = NO

3) create your own controls on this ViewController's view

回答2:

Xcode 7.3, iOS 9.3

My way is a bit hacky, but essentially I drill down the view hierarchy to find CMKShutterButton, then attach a method to the the appropriate control event.

See my post and solution here: iOS, UIImagePickerController, is there a way to detect when user taps the take picture button without implementing custom controls? and https://stackoverflow.com/a/36489246/4018041.

Hope this helps! Cheers.

来源：https://stackoverflow.com/questions/19241576/how-to-know-i-tap-taking-photo-button-with-uiimagepicker