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我想知道什么AVCaptureDevice设置是iPhone上的相机应用程序。特别是AVCaptureExposureMode，AVCaptureFocusMode和AVCaptureWhiteBalanceMode。我正在尝试制作自定义相机，出于某种原因，我无法使照片的光线在对焦时正确更改。我为我的相机设置了ExposurePointOfInterest和FocusPointOfInterest，但出于某种原因，它好像照相机正确对焦，但照明不会在我点击时聚焦。当我点击一个黑暗区域时，它不会像照相机应用程序中那样变亮。有没有我忘记设置的设置？这是我用于对焦相机的代码。什么是iPhone上的摄像头应用程序的AVFoundation AVCaptureDevice设置？
CGPoint touchPoint = [gesture locationInView:collectView];
float focus_x = touchPoint.x/collectView.frame.size.width;
float focus_y = touchPoint.y/collectView.frame.size.height;
NSError *tError = nil;
NSLog(@"previous: %.2f, %.2f", backCamera.focusPointOfInterest.x, backCamera.focusPointOfInterest.y);
if (isFrontCamera) {
focus_x = collectView.frame.size.width - focus_x; //the view is mirrored for the front camera
if ([frontCamera lockForConfiguration:&tError]) {
if ([frontCamera isExposurePointOfInterestSupported]) {
[frontCamera setExposurePointOfInterest:CGPointMake(focus_x, focus_y)];
if ([frontCamera isExposureModeSupported:AVCaptureExposureModeAutoExpose]) {
[frontCamera setExposureMode:AVCaptureExposureModeAutoExpose];
}
}
if ([frontCamera isFocusPointOfInterestSupported]) {
[frontCamera setFocusPointOfInterest:CGPointMake(focus_x, focus_y)];
if ([frontCamera isExposureModeSupported:AVCaptureExposureModeAutoExpose]) {
[frontCamera setExposureMode:AVCaptureExposureModeAutoExpose];
}
}
if ([frontCamera isWhiteBalanceModeSupported:AVCaptureWhiteBalanceModeAutoWhiteBalance]) {
[frontCamera setWhiteBalanceMode:AVCaptureWhiteBalanceModeAutoWhiteBalance];
}
[frontCamera unlockForConfiguration];
}
else {
NSLog(@"Couldn't change focus point:%@",tError);
}
}
else {
if ([backCamera lockForConfiguration:&tError]) {
if ([backCamera isExposurePointOfInterestSupported]) {
[backCamera setExposurePointOfInterest:CGPointMake(focus_x, focus_y)];
if ([backCamera isExposureModeSupported:AVCaptureExposureModeAutoExpose]) {
[backCamera setExposureMode:AVCaptureExposureModeAutoExpose];
}
}
if ([backCamera isFocusPointOfInterestSupported]) {
[backCamera setFocusPointOfInterest:CGPointMake(focus_x, focus_y)];
if ([backCamera isFocusModeSupported:AVCaptureFocusModeAutoFocus]) {
[backCamera setFocusMode:AVCaptureFocusModeAutoFocus];
}
}
if ([backCamera isWhiteBalanceModeSupported:AVCaptureWhiteBalanceModeAutoWhiteBalance]) {
[backCamera setWhiteBalanceMode:AVCaptureWhiteBalanceModeAutoWhiteBalance];
}
[backCamera unlockForConfiguration];
}
else {
NSLog(@"Couldn't change focus point:%@",tError);
}
}