旋转后图片放大变形

  

   //实现图片容器向左旋转

    

    rotaion=90;

    CGAffineTransform currentTransform =self.showImgView.transform;

    CGAffineTransform newTransform =CGAffineTransformRotate(currentTransform,DEGREES_TO_RADIANS(rotaion));

    [self.showImgViewsetTransform:newTransform];

   //实现图片向左旋转

    self.originalImage=[self.showImgView.imageimageRotatedByRadians:DEGREES_TO_RADIANS(rotaion)];

//设置不变形

 self.showImgView.contentMode=UIViewContentModeScaleAspectFit;