将记录保存到 CloudKit 时应用崩溃

App crashes when saving record to CloudKit

我正在使用 CloudKit 来保存用户输入的记录,但是我的应用程序崩溃了。

下面是我的代码:

func saveRecordToCloud(_ pinpoint:Details!) -> Void {
    // Prepare the record to save
    let record = CKRecord(recordType: "Details")
    record.setValue(pinpoint.title, forKey: "title")
    record.setValue(pinpoint.location, forKey: "location")
    record.setValue(pinpoint.date, forKey: "date")

    // Resize the image
    let originalImage = UIImage(data: pinpoint.image as Data)!
    let scalingFactor = (originalImage.size.width > 1024) ? 1024 / originalImage.size.width : 1.0
    let scaledImage = UIImage(data: pinpoint.image as Data, scale: scalingFactor)!

    // Write the image to local file for temporary use
    let imageFilePath = NSTemporaryDirectory() + pinpoint.title
    try? UIImageJPEGRepresentation(scaledImage, 0.8)?.write(to: URL(fileURLWithPath: imageFilePath), options: [.atomic])

    // Create image asset for upload
    let imageFileURL = URL(fileURLWithPath: imageFilePath)
    let imageAsset = CKAsset(fileURL: imageFileURL)
    record.setValue(imageAsset, forKey: "image")


    // Get the Public iCloud Database
    let publicDatabase = CKContainer.default().publicCloudDatabase

    // Save the record to iCloud
    publicDatabase.save(record, completionHandler: { (record:CKRecord?, error:NSError?) -> Void  in
        // Remove temp file
        do {
            try FileManager.default.removeItem(atPath: imageFilePath)

        } catch {
            print("Failed to save record to the cloud: \(error)")
        }
        } as! (CKRecord?, Error?) -> Void)
}

我收到的错误是:

Thread 1: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)

这是倒数第二行} as! (CKRecord?, Error?) -> Void)

我正在使用 Swift 3.0

当我将我的旧 Swift 2.x 项目转换为 Swift 3 时,我遇到了完全相同的问题。他们采用 CloudKit 完成处理程序,而不是将它们转换为 Swift 3 - 将其留在 Swift 2 中,然后将其转换为 Swift 3 的 CKCompletionHandler。它总是会导致崩溃。从完成处理程序的末尾删除 as! (CKRecord?, Error?) -> Void) 行。然后返回到您的实际完成处理程序并将其更改为如下所示:

publicDatabase.save(record, completionHandler: { (record:CKRecord?, error: Error?) in
    // Remove temp file
    do {
        try FileManager.default.removeItem(atPath: imageFilePath)

    } catch {
        print("Failed to save record to the cloud: \(error)")
    }
}

基本上你只需要将NSError更改为Error,你就可以去掉-> void (returns void)这一行。这是多余的。让我知道是否有效。