我正在尝试创建一个错误对象以显示给用户。
let userInfo: [NSObject : AnyObject] =
[
"NSLocalizedDescriptionKey" : NSLocalizedString("Unauthorized", comment: ""),
"NSLocalizedFailureReasonErrorKey" : NSLocalizedString("Unauthorized", comment: "")
]
let err = NSError(domain: "ShiploopHttpResponseErrorDomain", code: httpResponse.statusCode, userInfo: userInfo)
print("Error in Post: \(err.localizedDescription)")
不幸的是输出是:
Error in Post: The operation couldn’t be completed.(ShiploopHttpResponseErrorDomain error 401.)
我希望能够向用户表明他应该激活他的帐户。有任何想法吗??
看起来像您想要的(请参阅字典键):
迅捷2
let userInfo: [NSObject : AnyObject] =
[
NSLocalizedDescriptionKey : NSLocalizedString("Unauthorized", value: "Please activate your account", comment: ""),
NSLocalizedFailureReasonErrorKey : NSLocalizedString("Unauthorized", value: "Account not activated", comment: "")
]
迅捷3
let userInfo: [AnyHashable : Any] =
[
NSLocalizedDescriptionKey : NSLocalizedString("Unauthorized", value: "Please activate your account", comment: "") ,
NSLocalizedFailureReasonErrorKey : NSLocalizedString("Unauthorized", value: "Account not activated", comment: "")
]
然后像这样在swift 2或3中创建错误对象:
let err = NSError(domain: "ShiploopHttpResponseErrorDomain", code: 401, userInfo: userInfo)
println("Error in Post: \(err.localizedDescription)")
NSLocalizedDescriptionKey和NSLocalizedFailureReasonErrorKey是全局String变量,以及userInfo字典中的键。这些值与您指定的值略有不同:
println(NSLocalizedDescriptionKey) //prints "NSLocalizedDescription"
println(NSLocalizedFailureReasonErrorKey) //prints "NSLocalizedFailureReason"
我发现通过右键单击该类(在本例中为NSError)并在xcode中选择“跳转到定义”来查看文档是一种很好的做法。各种问题都可以通过这种方式回答。:)
在Swift 3中创建一个非常简单的错误:
let error = NSError(domain: "", code: 0, userInfo: [NSLocalizedDescriptionKey : "Object does not exist"])
创建错误很简单,如以下行所示:
let error = NSError(domain: "com.example.error", code: 0, userInfo: [NSLocalizedDescriptionKey: "message"])
如果您需要其他堆栈跟踪信息,请使用以下方法:
func error(_ message: String, code: Int = 0, domain: String = "com.example.error", function: String = #function, file: String = #file, line: Int = #line) -> NSError {
let functionKey = "\(domain).function"
let fileKey = "\(domain).file"
let lineKey = "\(domain).line"
let error = NSError(domain: domain, code: code, userInfo: [
NSLocalizedDescriptionKey: message,
functionKey: function,
fileKey: file,
lineKey: line
])
// Crashlytics.sharedInstance().recordError(error)
return error
}
用法:
let localizedErrorMessage: String = NSLocalizedString("Unauthorized", comment: "Account not activated")
let error = error(localizedErrorMessage)
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文章标签:ios , nserror , swift
版权声明:本文为原创文章,版权归 admin 所有,欢迎分享本文,转载请保留出处!
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