Question

更新到swift 2.0后之前出现了一些错误，这是代码

let dict = NSMutableDictionary()   
dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"
dict[NSLocalizedFailureReasonErrorKey] = failureReason   
dict[NSUnderlyingErrorKey] = error      
error = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict as [NSObject: AnyObject])

错误信息如下：

'NSMutableDictionary' is not convertible to '[NSObject : AnyObject]'

有关如何修复的想法吗？

Answer 1

我无法重现您的问题，但有一些建议完全避免NSMutableDictionary（从而消除了演员阵容）：

您可以直接使用Swift Dictionary，无需演员：

var dict = [NSObject: AnyObject]()
dict[NSLocalizedDescriptionKey]        = "Failed to initialize the application's saved data"
dict[NSLocalizedFailureReasonErrorKey] = failureReason
dict[NSUnderlyingErrorKey]             = error

您也可以在单个语句中声明字典和键/值：

let dict: [NSObject : AnyObject] = [
    NSLocalizedDescriptionKey        : "Failed to initialize the application's saved data",
    NSLocalizedFailureReasonErrorKey : failureReason,
    NSUnderlyingErrorKey             : error
]

Answer 2

我已经浏览了您的代码，我修改如下。请看下面的代码：

var dict = NSMutableDictionary() as [NSObject : AnyObject]
let error :NSError = {    return NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict as [NSObject: AnyObject]) }()

dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"
dict[NSLocalizedFailureReasonErrorKey] = "hello"
dict[NSUnderlyingErrorKey] = error

'NSMutableDictionary'不能转换为'[NSObject：AnyObject]'swift 2.0

2 个答案: