当我使用这种方法从我的 AVCaptureSession 拍照时...
func didPressTakePhoto(){
toggleFlash()
if let videoConnection = stillImageOutput?.connectionWithMediaType(AVMediaTypeVideo){
videoConnection.videoOrientation = AVCaptureVideoOrientation.Portrait
stillImageOutput?.captureStillImageAsynchronouslyFromConnection(videoConnection, completionHandler: {
(sampleBuffer, error) in
if sampleBuffer != nil {
let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(sampleBuffer)
self.capturedImage = UIImage(data: imageData)
if self.camera == true {
self.capturedImage = UIImage(CGImage: self.capturedImage.CGImage!, scale: 1.0, orientation: UIImageOrientation.Right)
} else {
self.capturedImage = UIImage(CGImage: self.capturedImage.CGImage!, scale: 1.0, orientation: UIImageOrientation.LeftMirrored)
}
self.tempImageView.clipsToBounds = true
self.tempImageView.image = self.capturedImage
self.tempImageView.hidden = false
self.goButton.hidden = false
self.cameraView.hidden = true
self.removeImageButton.hidden = false
self.captureButton.hidden = true
}
})
}
}
我旋转图像以固定方向，使其看起来像在 ImageView 中应该看起来的样子。当我将它另存为 PFFile 进行解析时，它向左旋转 90 度，完全弄乱了方向。这是我保存要解析的图像的地方...
@IBAction func go(sender: UIButton) {
let newUser = PFUser()
newUser["email"] = emailString
newUser.password = passwordString
newUser.username = usernameString
let imageData = UIImagePNGRepresentation(tempImageView.image)
let imageFile = PFFile(name: "avatar.png", data: imageData!)
newUser["avatar"] = imageFile
newUser.signUpInBackgroundWithBlock({ (success, error) -> Void in
if success != true {
let signUpAlert = UIAlertController(title: "Couldn't Sign Up!", message:
"An error occured please try again.", preferredStyle: UIAlertControllerStyle.Alert)
signUpAlert.addAction(UIAlertAction(title: "Try Again", style: .Default, handler: { (action: UIAlertAction!) -> Void in
sender.sendActionsForControlEvents(.TouchUpInside)
}))
signUpAlert.addAction(UIAlertAction(title: "Cancel", style: .Default, handler: { (action: UIAlertAction!) -> Void in
}))
self.presentViewController(signUpAlert, animated: true, completion: nil)
}
})
}
如果需要更多信息，请告诉我。谢谢!
最佳答案
Parse 不会对您的图像做任何事情。当您在 UIImage 中旋转 JPEG 图像时，JPEG 图像数据不会被旋转。相反，方向存储在其 EXIF 元数据中。当您将图像转换为 PNG 以保存在 Prase 上时，EXIF 元数据会丢失，因为 PNG 不存储任何方向元数据信息。为了以正确的方向和镜像获取图像，请在捕获图像之前为您的视频连接设置正确的方向和镜像属性。或者，您可以将图像存储为 JPEG 而不是 PNG。
关于ios - 不保存所需的图像方向，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33557563/