1.修改iOS拍照参数设置。

common/Camera/RACameraViewController.m

@@ -208,8 +208,8 @@
     
     [self.captureSession beginConfiguration];
     
-    if ([_captureSession canSetSessionPreset:AVCaptureSessionPresetHigh]) {
-        _captureSession.sessionPreset = AVCaptureSessionPresetHigh;
+    if ([_captureSession canSetSessionPreset:AVCaptureSessionPresetPhoto]) {
+        _captureSession.sessionPreset = AVCaptureSessionPresetPhoto;
     }
     
     if ([self.captureDevice isFlashAvailable] && [_captureDevice isFlashModeSupported:AVCaptureFlashModeAuto]) {
@@ -219,6 +219,13 @@
         [self.captureDevice unlockForConfiguration];
     }
     
+//    if ([self.captureDevice isAdjustingWhiteBalance] && [self.captureDevice isWhiteBalanceModeSupported:AVCaptureWhiteBalanceModeAutoWhiteBalance]) {
+//        NSError *configErr;
+//        [self.captureDevice lockForConfiguration:&configErr];
+//        [self.captureDevice setWhiteBalanceMode:AVCaptureWhiteBalanceModeAutoWhiteBalance];
+//        [self.captureDevice unlockForConfiguration];
+//    }
+    
     if ([self.captureSession canAddInput:self.captureInput]) {