ios - Swift 3 上传图片到 Parse Server

Question

我正在尝试使用 PFFile 将图像上传到 Parse Server。从 Parse Dashboard 手动上传它并从应用程序检索它没有问题。但是，如果我尝试使用此方法上传新的图像，则图像不会更新。

其余字段正在正确上传(姓名、姓氏、用户名和电子邮件)

保存方式:

@IBAction func saveBtnPressed(_ sender: Any) {

    print("Start saving...")

    let imageData = UIImagePNGRepresentation(profilePic.image!)
    print ("imageData value:")
    print(imageData!)
    let imageFile = PFFile(name:"avatar.png", data:imageData!)
    print ("imageFile value:")
    print(imageFile!)

    let query = PFQuery(className: "_User")
    query.whereKey("username", equalTo: (PFUser.current()?.username)!)
    query.findObjectsInBackground(block: { (objects, error) in
    if let user = objects {
        for object in user {
            object["name"] = self.nameFld.text
            object["lastname"] = self.lastnameFld.text
            object["username"] = self.emailFld.text
            object["email"] = self.emailFld.text
            object["avatar"] = imageFile

            print(object)
            object.saveInBackground()
        }
    }
    })

}

输出:

Start saving...
imageData value:
8358983 bytes
(lldb)

Answer 1

要完成这项工作，您只需要先上传图片，然后将其引用给用户

let imageData = UIImagePNGRepresentation(profilePic.image!)
print ("imageData value:")
print(imageData!)
let imageFile = PFFile(name:"avatar.png", data:imageData!)
print ("imageFile value:")
print(imageFile!)

imageFile.saveInBackground { (result, error) in
    if let error = error{
        print(error)
    }else{
        let query = PFQuery(className: "_User")
        query.whereKey("username", equalTo (PFUser.current()?.username)!)
        query.findObjectsInBackground(block: { (objects, error) in
            if let user = objects {
                for object in user {
                    object["name"] = self.nameFld.text
                    object["lastname"] = self.lastnameFld.text
                    object["username"] = self.emailFld.text
                    object["email"] = self.emailFld.text
                    object["avatar"] = imageFile

                    print(object)
                    object.saveInBackground()
                }
            }
        })

    }
}
}

请注意，在上面的示例中，即使没有用户匹配查询，文件也会始终上传到服务器，因此请考虑仅在获得查询结果后才上传文件。