拍出来的照片尺寸是个正方形（拍照时的照片大小缩小了），修改了下面的红色代码后，使照片大小跟拍照时的大小就一直了
#pragma mark - CHPhotoImageChooseDelegate method
-(void)chooseTakePhotoBtn
{
UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])
{
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
//picker.allowsEditing = YES;
picker.sourceType = sourceType;
使照片大小跟拍照时的大小一致
picker.cameraViewTransform = CGAffineTransformScale(picker.cameraViewTransform, 1.0, 1.0);
[_photoView dismissViews];
[self presentViewController:picker animated: YES completion:nil] ;
}
else
{
CHDebugLog(@"该设备无摄像头");
}
}