在Swift 2 form Firebase存储上下载图像
每当我从Firebase存储下载图像时，它的下载效果都非常好，但一旦我尝试将imageview“my”更改为它，imageview就会消失。我没有限制，我导航到本地URL，在那里找到了完美的图像。有什么帮助吗？我做错什么了吗在Swift 2 form Firebase存储上下载图像,firebase,swift2,firebase-storage,Firebase,Swift2,Firebase Storage,每当我从Firebase存储下载图像时，它的下载效果都非常好，但一旦我尝试将imageview“my”更改为它，imageview就会消失。我没有限制，我导航到本地URL，在那里找到了完美的图像。有什么帮助吗？我做错什么了吗 func loadImages(){ let documentDirectoryURL = try! NSFileManager.defaultManager().URLForDirectory(.DocumentDirectory, inDomain: .
func loadImages(){
let documentDirectoryURL = try! NSFileManager.defaultManager().URLForDirectory(.DocumentDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: true)
let newRef = storageRef!.child("Images/0.jpg")
let fileDestinationUrl = documentDirectoryURL.URLByAppendingPathComponent("p.jpg")
let downloadTask = newRef.writeToFile(fileDestinationUrl){ (URL, error) -> Void in
if (error != nil) {
print("problem")
} else {
print("done")
}
}
downloadTask.observeStatus(.Success) { (snapshot) -> Void in
print(fileDestinationUrl)
var temp = String(fileDestinationUrl)
print(temp)
var my = UIImage(contentsOfFile: temp)
self.image.image = my
}
}
在控制台中打印destinationUrl。转到下载的文件位置，打开终端，在终端中拖放下载的图像，终端将为您提供其实际路径。现在比较终端为您提供的路径和控制台为您提供的路径，并将其匹配。大多数人都认为它们是不同的，所以要相应地改变它们 示例代码：- 上传代码：-
func profilePictureUploading(infoOnThePicture : [String : AnyObject],completionBlock : (()->Void)) {
if let referenceUrl = infoOnThePicture[UIImagePickerControllerReferenceURL] {
print(referenceUrl)
let assets = PHAsset.fetchAssetsWithALAssetURLs([referenceUrl as! NSURL], options: nil)
print(assets)
let asset = assets.firstObject
print(asset)
asset?.requestContentEditingInputWithOptions(nil, completionHandler: { (ContentEditingInput, infoOfThePicture) in
let imageFile = ContentEditingInput?.fullSizeImageURL
print("imagefile : \(imageFile)")
let filePath = FIRAuth.auth()!.currentUser!.uid + "/\(Int(NSDate.timeIntervalSinceReferenceDate() * 1000))/\(imageFile!.lastPathComponent!)"
print("filePath : \(filePath)")
FIRControllerClass.storageRef.child("ProfilePictures").child(filePath).putFile(imageFile!, metadata: nil, completion: { (metadata, error) in
if error != nil{
print("error in uploading image : \(error)")
}
else{
print("metadata in : \(metadata!)")
print(metadata?.downloadURL())
print("The pic has been uploaded")
print("download url : \(metadata?.downloadURL())")
self.uploadSuccess(metadata!, storagePath: filePath)
completionBlock()
}
})
})
}else{
print("No reference URL found!")
}
}
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
print("paths in user home page : \(paths)")
let documentDirectory = paths[0]
print("documents directory in homePage : \(documentDirectory)")
let filePath = "file:\(documentDirectory)/\(user!.uid).jpg"
var filePath2 : String = filePath
print(filePath)
let storagePath = NSUserDefaults.standardUserDefaults().objectForKey("storagePath") as! String
print("storagePath is : \(storagePath)")
storageRef.child("ProfilePictures").child(storagePath).writeToFile(NSURL.init(string: filePath)! , completion :
{ (url, err) -> Void in
if let error = err{
print("error while downloading your image :\(error)")
}else{
print("Download successful !")
print("the file filePath of the downloaded file : \(filePath)")
filePath2 = "\(documentDirectory)/\(self.user!.uid).jpg"
if let downloadedImage = UIImage(contentsOfFile: filePath2){
self.profilePictureImageView.image = downloadedImage
print("displayed")
}else{
print("unable to display")
}
}
})
我给你的代码块只是众多解决方案中的一个，有很多方法可以做到这一点，请转到控制台中的打印目标URL。转到下载的文件位置，打开终端，在终端中拖放下载的图像，终端将为您提供其实际路径。现在比较终端提供给您的路径和console提供给您的路径，并匹配它们。大多数人都认为它们是不同的，所以要相应地改变它们 示例代码：- 上传代码：-
func profilePictureUploading(infoOnThePicture : [String : AnyObject],completionBlock : (()->Void)) {
if let referenceUrl = infoOnThePicture[UIImagePickerControllerReferenceURL] {
print(referenceUrl)
let assets = PHAsset.fetchAssetsWithALAssetURLs([referenceUrl as! NSURL], options: nil)
print(assets)
let asset = assets.firstObject
print(asset)
asset?.requestContentEditingInputWithOptions(nil, completionHandler: { (ContentEditingInput, infoOfThePicture) in
let imageFile = ContentEditingInput?.fullSizeImageURL
print("imagefile : \(imageFile)")
let filePath = FIRAuth.auth()!.currentUser!.uid + "/\(Int(NSDate.timeIntervalSinceReferenceDate() * 1000))/\(imageFile!.lastPathComponent!)"
print("filePath : \(filePath)")
FIRControllerClass.storageRef.child("ProfilePictures").child(filePath).putFile(imageFile!, metadata: nil, completion: { (metadata, error) in
if error != nil{
print("error in uploading image : \(error)")
}
else{
print("metadata in : \(metadata!)")
print(metadata?.downloadURL())
print("The pic has been uploaded")
print("download url : \(metadata?.downloadURL())")
self.uploadSuccess(metadata!, storagePath: filePath)
completionBlock()
}
})
})
}else{
print("No reference URL found!")
}
}
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
print("paths in user home page : \(paths)")
let documentDirectory = paths[0]
print("documents directory in homePage : \(documentDirectory)")
let filePath = "file:\(documentDirectory)/\(user!.uid).jpg"
var filePath2 : String = filePath
print(filePath)
let storagePath = NSUserDefaults.standardUserDefaults().objectForKey("storagePath") as! String
print("storagePath is : \(storagePath)")
storageRef.child("ProfilePictures").child(storagePath).writeToFile(NSURL.init(string: filePath)! , completion :
{ (url, err) -> Void in
if let error = err{
print("error while downloading your image :\(error)")
}else{
print("Download successful !")
print("the file filePath of the downloaded file : \(filePath)")
filePath2 = "\(documentDirectory)/\(self.user!.uid).jpg"
if let downloadedImage = UIImage(contentsOfFile: filePath2){
self.profilePictureImageView.image = downloadedImage
print("displayed")
}else{
print("unable to display")
}
}
})