“[CFString!]”不能转换为“[String]”

Question

在 Swift 1.2 之前我有以下数组：

private let phoneLabels = [
    kABPersonPhoneMobileLabel,
    kABPersonPhoneIPhoneLabel,
    kABWorkLabel,
    kABHomeLabel,
    kABPersonPhoneMainLabel,
    kABPersonPhoneHomeFAXLabel,
    kABPersonPhoneWorkFAXLabel,
    kABPersonPhonePagerLabel,
    kABOtherLabel
] as [String]

我把Xcode更新到6.3后，就不能这样了:

private let phoneLabels = [
    kABPersonPhoneMobileLabel,
    kABPersonPhoneIPhoneLabel,
    kABWorkLabel,
    kABHomeLabel,
    kABPersonPhoneMainLabel,
    kABPersonPhoneHomeFAXLabel,
    kABPersonPhoneWorkFAXLabel,
    kABPersonPhonePagerLabel,
    kABOtherLabel
] as! [String]

因为编译器显示错误：'[CFString!]' is not convertible to '[String]'.

我可能可以将数组中的每个 CFString 转换为 String，但也许有更简单、更易读的方法来解决这个问题？

Answer 1

像这样：

private let phoneLabels = [
    kABPersonPhoneMobileLabel,
    kABPersonPhoneIPhoneLabel,
    kABWorkLabel,
    kABHomeLabel,
    kABPersonPhoneMainLabel,
    kABPersonPhoneHomeFAXLabel,
    kABPersonPhoneWorkFAXLabel,
    kABPersonPhonePagerLabel,
    kABOtherLabel
] as [AnyObject] as! [String]

“[CFString!]”不能转换为“[String]”

'[CFString!]' is not convertible to '[String]'

cfstring

ios

swift