将UIImage Picker中的图像上传到新的Firebase（Swift） [英] Uploading Images from UIImage Picker onto new Firebase (Swift)

问题描述

我有一个UIImagePicker设置在我的应用程序，工作正常。当我的UIImage选择器被选中时，我想上传一个配置文件图片到Firebase。这是我选择照片时的功能。

  //图像选取器完成了代码
 func imagePickerController（picker：UIImagePickerController，didFinishPickingMediaWithInfo info：[String：AnyObject] ）{
 
让chosenImage = info [UIImagePickerControllerOriginalImage] as！ UIImage 
 profilePic.contentMode = .ScaleAspectFill 
 profilePic.image = chosenImage $ b $ profilePic.hidden = false 
 buttonStack.hidden = true 
 changeButtonView.hidden = false 
 self.statusLabel.text =这是你的个人资料图片
 
 dismissViewControllerAnimated（true，completion：nil）
 
 
 
 $ / code> 

新文档声明我们需要声明一个NSURl来上传一个文件。这里是我试图找到给定文件的NSURL，但它不起作用。以下是文档及其链接： https://firebase.google .com / docs / storage / ios / upload-files＃upload_from_data_in_memory

  //位于磁盘$ b上的文件$ b让localFile：NSURL = ... 
 //创建一个你想要上传的文件的引用
 let riversRef = storageRef.child（images / rivers.jpg）
 
 //将文件上传到路径images / rivers.jpg
 let uploadTask = riversRef.putFile（localFile，元数据：nil）{元数据，错误
 if（error！= nil ）{
 //呃 - 哦，发生了一个错误！ 
} else {
 //元数据包含文件元数据，如大小，内容类型和下载URL。 
让downloadURL =元数据！.downloadURL 
 
 
 code> 

这里是我尝试检索UIImagePicker的NSURL：

pre $ $ code图像选择器完成代码
func imagePickerController picker：UIImagePickerController，didFinishPickingMediaWithInfo info：[String：AnyObject]）{

let chosenImage = info [UIImagePickerControllerOriginalImage] as！ UIImage
//获取对象的URL
让imageUrl = info [UIImagePickerControllerReferenceURL] as！ NSURL
let imageName = imageUrl.lastPathComponent
let documentDir = NSSearchPathForDirectoriesInDomains（.DocumentDirectory，.UserDomainMask，true）.first！作为字符串;
let photoUrl = NSURL（fileURLWithPath：documentDir）
let localPath = photoUrl.URLByAppendingPathComponent（imageName！）
self.localFile = localPath
$ b $ profilePic.contentMode = .ScaleAspectFill
profilePic.image = chosenImage
profilePic.hidden = false
buttonStack.hidden = true
changeButtonView.hidden = false
self.statusLabel.text =Here is Your档案图片

dismissViewControllerAnimated（true，completion：nil）

$ b}


我相信，如果图像是从相机而不是相册拍摄的，我也遇到了困难，因为它还没有保存在设备上。我如何找到这张图片/快照的NSURL？

解决方案

这里是我从firebase存储上传和下载用户个人资料照片的方法：



  func imagePickerController（picker：UIImagePickerController，didFinishPickingImage image：UIImage，editingInfo：[String：AnyObject]？）{
 userPhoto.image = image 
 dismissViewControllerAnimated（true，completion：nil）
 var data = NSData（）
 data = UIImageJPEGRepresentation（userPhoto.image！，0.8）！ 
 //设置上传路径
 let filePath =\（FIRAuth.auth（）!. currentUser！.uid）/ \（userPhoto）
 let metaData = FIRStorageMetadata ）
 metaData.contentType =image / jpg
 self.storageRef.child（filePath）.putData（data，metadata：metaData）{（metaData，error）in $ b $ if if error =错误{
 print（error.localizedDescription）
 return 
} else {
 // store downloadURL 
 let downloadURL = metaData！.downloadURL（）!. absoluteString 
 // store downloadURL at database 
 self.databaseRef.child（users）。child（FIRAuth.auth（）!. currentUser！.uid）.updateChildValues（[userPhoto：downloadURL]）
 
 
 
 $ b $ / code $ / pre 
 
我也存储图片网址到firebase数据库，并检查用户是否有个人资料照片或你可能会崩溃：
 $ b $ pre $  //获取照片回
 
 databaseRef.child（users） .child（userID！）。observeSingleEventOfType（.Value，withBlock：{（snapshot）in 
 //检查用户是否有照片
如果snapshot.hasChild（userPhoto）{
 //设置图像位置
 let filePath =\（userID！）/ \（userPhoto）
 //假设一个< 10MB文件，尽管你可以改变
 self.storageRef.child（filePath）.dataWithMaxSize（10 * 1024 * 1024，完成：{（data，error）in 
 
 let userPhoto = UIImage （data：data！）
 self.userPhoto.image = userPhoto 
}）
} 
}）
  




I have a UIImagePicker set up within my app that works fine. I would like to upload a profile picture to Firebase when my UIImage picker has been chosen. Here is my function for when a picture has been selected.

    //image picker did finish code
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {

    let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
    profilePic.contentMode = .ScaleAspectFill
    profilePic.image = chosenImage
    profilePic.hidden = false
    buttonStack.hidden = true
    changeButtonView.hidden = false
    self.statusLabel.text = "Here is Your Profile Picture"

    dismissViewControllerAnimated(true, completion: nil)


}

The new documentation states that we need to declare a NSURl in order to upload a file. Here is my attempt to find the NSURL of the given file, but it doesn't work. Here is the documentation and a link to it:https://firebase.google.com/docs/storage/ios/upload-files#upload_from_data_in_memory

// File located on disk
let localFile: NSURL = ...
// Create a reference to the file you want to upload
let riversRef = storageRef.child("images/rivers.jpg")

// Upload the file to the path "images/rivers.jpg"
let uploadTask = riversRef.putFile(localFile, metadata: nil) { metadata, error in
  if (error != nil) {
    // Uh-oh, an error occurred!
  } else {
    // Metadata contains file metadata such as size, content-type, and download URL.
    let downloadURL = metadata!.downloadURL
  }
}

Here is my attempt for retrieving the NSURL of the UIImagePicker:

//image picker did finish code
    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {

        let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
        //getting the object's url
        let imageUrl = info[UIImagePickerControllerReferenceURL] as! NSURL
        let imageName = imageUrl.lastPathComponent
        let documentDir = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first! as String;
        let photoUrl = NSURL(fileURLWithPath: documentDir)
        let localPath = photoUrl.URLByAppendingPathComponent(imageName!)
        self.localFile = localPath

        profilePic.contentMode = .ScaleAspectFill
        profilePic.image = chosenImage
        profilePic.hidden = false
        buttonStack.hidden = true
        changeButtonView.hidden = false
        self.statusLabel.text = "Here is Your Profile Picture"

        dismissViewControllerAnimated(true, completion: nil)


    }

I believe that I am also running into difficulties if the image was taken from the camera instead of the gallery since it is not saved on the device yet. How do I find this image/snapshots's NSURL?

解决方案

Here is my method to upload and download the user profile photo from firebase storage:

    func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {
    userPhoto.image = image
    dismissViewControllerAnimated(true, completion: nil)
    var data = NSData()
    data = UIImageJPEGRepresentation(userPhoto.image!, 0.8)!
    // set upload path
    let filePath = "\(FIRAuth.auth()!.currentUser!.uid)/\("userPhoto")"
    let metaData = FIRStorageMetadata()
    metaData.contentType = "image/jpg"
    self.storageRef.child(filePath).putData(data, metadata: metaData){(metaData,error) in
        if let error = error {
            print(error.localizedDescription)
            return
        }else{
        //store downloadURL
        let downloadURL = metaData!.downloadURL()!.absoluteString
        //store downloadURL at database
    self.databaseRef.child("users").child(FIRAuth.auth()!.currentUser!.uid).updateChildValues(["userPhoto": downloadURL])
        }

        }
                   }

I also storage the Image URL into firebase database and check if user has profile photo or u might get crash :

 //get photo back

     databaseRef.child("users").child(userID!).observeSingleEventOfType(.Value, withBlock: { (snapshot) in
            // check if user has photo
            if snapshot.hasChild("userPhoto"){
                // set image locatin
                let filePath = "\(userID!)/\("userPhoto")"
                // Assuming a < 10MB file, though you can change that
                self.storageRef.child(filePath).dataWithMaxSize(10*1024*1024, completion: { (data, error) in

                    let userPhoto = UIImage(data: data!)
                    self.userPhoto.image = userPhoto
                })
            }
        })

这篇关于将UIImage Picker中的图像上传到新的Firebase（Swift）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！