＆＃39; [！CFString字符串]＆＃39;不能转换为＆＃39; [String]＆＃39;

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]

在我将Xcode更新为6.3后，我不能这样：

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

因为编译器向我显示错误：'[CFString!]' is not convertible to '[String]'。

我可以将数组中的每个CFString转换为String，但也许有一种更简单，更易读的方法来修复它？

Answer 1

像这样：

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