ios 缩放图片（平铺）

//缩放图片（平铺）

- (UIImage *)resizeImage:(NSString *)imgName

{

UIImage *bgImage =  [UIImage imageNamed:imgName];

//缩放图片

bgImage = [bgImage stretchableImageWithLeftCapWidth:bgImage.size.width / 2 topCapHeight:bgImage.size.height / 2];

return bgImage;

}