PFObject的语法saveInBackground progressBlock

Question

解析PFObject saveInBackground progressBlock的Swift5语法是什么？我收到错误消息“调用中的参数标签不正确（具有_：progressBlock，预期与Target：selector一起使用。）解析文档似乎不是最新的。在此先感谢您的任何建议。

let imageData = image.pngData()!
let imageFileObject = PFFileObject(name: "image.png", data: imageData)
let userPhoto = PFObject(className: "ARReferenceImages")
userPhoto["imageName"] = "Test 1"
userPhoto["imageFileObject"] = imageFileObject

userPhoto.saveInBackground ({ (success: Bool, error: Error?) in       // Xcode error here
        if (success) {
            print("image saved to cloud")
        } else if error != nil {
            print("error saving data to cloud")
        }
    }, progressBlock: { (percentDone: Int32) in
        // code to update progress bar spinner here
    })

Answer 1

PFObject没有progressBlock。 PFFile是拥有的。您应该这样使用它：

let imageData = image.pngData()!
let imageFileObject = PFFileObject(name: "image.png", data: imageData)
imageFileObject.saveInBackground ({ (success: Bool, error: Error?) in       // Xcode error here
    if (success) {
        let userPhoto = PFObject(className: "ARReferenceImages")
        userPhoto["imageName"] = "Test 1"
        userPhoto["imageFileObject"] = imageFileObject
        userPhoto.saveInBackground { (succeeded, error)  in
            if (succeeded) {
                // The object has been saved.
            } else {
                // There was a problem, check error.description
            }
        }
    } else if error != nil {
            print("error saving data to cloud")
    }
}, progressBlock: { (percentDone: Int32) in
    // code to update progress bar spinner here
})