we-plugin/we-cropper

IOS图片裁剪过后旋转了180度，倒过来了，开发工具和安卓手机测试没有问题

Open

#71 opened on Aug 2, 2018

View on GitHub
 (2 comments) (0 reactions) (0 assignees)JavaScript (2,100 stars) (453 forks)batch import
help wanted

Description

引入部分如下： image image image

测试机型 iphone6 及6p image

问题描述：经过we-cropper裁剪图片生成base64之后后台转码存到文件服务器，访问文件服务器拿到图片与裁剪的原图相比旋转了180度，IOS真机测试才会出现这个问题，没用警告异常错误，不知道什么原因，希望大神解答

Contributor guide

Tech stack
javascript
Domain
frontendmobile
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
EXIF orientationiOS image handlingwe cropper usage
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
Investigate how we cropper handles image orientation on iOS. The issue likely arises from missing EXIF orientation handling when cropping images captured on iOS devices. Check the image loading and cropping pipeline in the we cropper source code (likely in the main cropping logic). Consider using canvas to correct orientation based on EXIF data before cropping. Look at similar issues in other image cropping libraries for reference.
IOS图片裁剪过后旋转了180度，倒过来了，开发工具和安卓手机测试没有问题 · we-plugin/we-cropper#71 | Good First Issue