ios - 带有进度的 saveInBackgroundWithBlock 在 Xcode 6.3 下的 Swift 中不起作用

Question

我从 parse.com 网站获得的以下代码不起作用:

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.
}

错误信息是:

Cannot invoke 'saveInBackgroundWithBlock' with an argument list of type '((Bool, NSError?) -> Void?, progressBlock: (Int) -> Void?)'

我尝试了不同的组合，但都没有用。任何想法？谢谢

Answer 1

在 IOS 8.3 中，以下代码段有效:

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.
    })

让我知道这是否适合您。