在Xcode 6.3下，帶有進度的saveInBackgroundWithBlock在Swift中不起作用

Question

我從parse.com網站獲得的以下代碼不起作用：

let str = "Working at Parse is great!"
let data = str.dataUsingEncoding(NSUTF8StringEncoding)
let file = PFFile(name:"resume.txt", data:data)
file.saveInBackgroundWithBlock {
  (succeeded: Bool!, error: NSError!) -> Void in
  // Handle success or failure here ...
}, progressBlock: {
  (percentDone: Int) -> Void in
  // Update your progress spinner here. percentDone will be between 0 and 100.
}

錯誤消息是：

無法使用類型為（（（Bool，NSError？）-> Void ?, progressBlock：（Int）-> Void？）'的參數列表調用'saveInBackgroundWithBlock'

我嘗試了不同的組合，但是沒有用。 任何想法？ 謝謝

Answer 1

在IOS 8.3中，以下代碼段有效：

let str = "Working at Parse is great!"
    let data = str.dataUsingEncoding(NSUTF8StringEncoding)
    let file = PFFile(name:"resume.txt", data:data!)

    file.saveInBackgroundWithBlock({ (succeeded: Bool, error: NSError?) -> Void in
        // Handle success or failure here ...
        if succeeded {
            println("Save successful")
        } else {
            println("Save unsuccessful: \(error?.userInfo)")
        }

        }, progressBlock: { (percentDone: Int32) -> Void in
        // Update your progress spinner here. percentDone will be between 0 and 100.
    })

讓我知道這是否適合您。

Answer 2

我遇到了同樣的問題，而mrbcg的方式對我有用。

要顯示進度，請執行以下操作：在Storyboard @IBOutlet weak var UploadProgressView: UIProgressView添加並連接IBOutlet 。

然后編輯以下內容：

progressBlock: { (percentDone: Int32) -> Void in
            // Update your progress spinner here. percentDone will be between 0 and 100.
            let percentProgress = Float(percentDone) / 100.0
            let animated = percentProgress != 0
            self.UploadProgressView.setProgress(percentProgress, animated: animated)
    })

override func viewDidLoad() {
    super.viewDidLoad()
    UploadProgressView.setProgress(0, animated: true)
    // Do any additional setup after loading the view.
}