问题
I'm using UIImagePickerController to snap an image and uploading it to server.
When taking a photo in the front camera, the height/width get reversed somewhere.
The image is displayed correctly later, but height and width are reversed (and I'm using them for the UIImageView autolayout constraint)
The thing is - that when looking at UIImagePickerControllerMediaMetadata of front and back camera images - the EXIF and the rest of the metadata is the same (resolution is smaller but the height/width ratio is the same)
Any ideas what is the difference?
回答1:
Apple images are always landscape left with EXIF and the orientation is specified in the EXIF.
回答2:
OK, so @zaph comment is correct, apparently back camera images are "reversed" as well - the upload code in the server (Codeigniter PHP) ignored the EXIF.
The problem surfaced only due to front camera low resolution...
来源：https://stackoverflow.com/questions/29460610/ios-wrong-orientation-when-using-front-camera-on-uiimagepickercontroller