FE6DC4C9-AB67-4BC6-8E63-D129974FAC27.png
_imageView.contentMode = UIViewContentModeScaleAspectFill;
单设UIViewContentModeScaleAspectFill,图片照片会超出imgview范围,所以需要clipsToBounds,切割一下周边。
_imageView.contentMode = UIViewContentModeScaleAspectFill;
_imageView.clipsToBounds = YES;