iOS SWIFT - 文件存档 - 参数类型“[String？]”：不符合预期类型'AnyObject'

Question

I am trying to write into an Archive and getting this error .

My tech stack is : XCode 7.1 Beta and SWIFT .Appreciate if any of you could share the exact code to fix this issue. Thanks in advance.

Argument Type "[String?]" : does not conform to expected type'AnyObject'

@IBAction func saveArch(sender: AnyObject) {

    var contactArray = [name.text, address.text, phone.text]
    NSKeyedArchiver.archiveRootObject(contactArray,
        toFile: dataFilePath!)

}

Thanks

Answer 1

Array is not of type AnyObject

You should try

NSKeyedArchiver.archiveRootObject(NSArray(array: contactArray),
    toFile: dataFilePath!)

You are sending a swift [] object that does not conform to AnyObject since arrays and object are different things in swift.

NSArray cannot contains optionals

You also have a problem with optionals: one or all of your .text is of type String? (therefor it might be nil).

If you are positive none of this field is nil, you can use

var contactArray = [name.text!, address.text!, phone.text!]

Or change the declaration.

If you are not sure, you should do something like

var contactArray = [String]()

for element in [name.text, address.text, phone.text] where element != nil {
    array.append(element!)
}
NSKeyedArchiver.archiveRootObject(NSArray(array: contactArray),
    toFile: dataFilePath!)

This way you only add non nil elements to the contactArray By the way, Xcode 7.1 is out. No need to use the beta anymore