判断从相机得到的UIImage方向
可以根据 UIImage 的 UIImageOrientation 属性判断 iPhone 拍摄照片时的横/纵属性，代码

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo{    if(image.imageOrientation==UIImageOrientationLeft||image.imageOrientation==UIImageOrientationRight){          }else{        }}