调用中的Swift 2额外参数'错误' [英] Swift 2 Extra argument ' error' in call
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问题描述
我正在使用Xcode 7将项目从Swift更新到Swift2,并且出现了CoreData错误:
Hi i'm updating my project from Swift to Swift2 with Xcode 7 and i'm getting this CoreData error :
Extra argument 'error' in call
在此行
if coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil, error: &error) == nil {
编辑
这是我的代码:
lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator? = {
// The persistent store coordinator for the application. This implementation creates and return a coordinator, having added the store for the application to it. This property is optional since there are legitimate error conditions that could cause the creation of the store to fail.
// Create the coordinator and store
var coordinator: NSPersistentStoreCoordinator? = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)
let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("Xipe_Tech.sqlite")
var error: NSError? = nil
var failureReason = "There was an error creating or loading the application's saved data."
do {
try coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil)
coordinator = nil
// Report any error we got.
var dict = [String: AnyObject]()
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)
// Replace this with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog("Unresolved error \(error), \(error!.userInfo)")
abort()
} catch let error as NSError {
print(error.localizedDescription)
}
return coordinator
}()
现在我在第一行出现错误 我该如何解决? 谢谢
now i get error in first line how can i fix that ?? Thanks
推荐答案
Swift 2现在提供了try/catch机制,可可API已被重写为使用此机制,而不是返回传统的Objective C方式的错误.
Swift 2 now provides a try/catch mechanism, and Cocoa APIs have been rewritten to use this instead rather than returning the error the traditional Objective C way.
您现在应该这样做:
do {
try coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil)
} catch let error as NSError {
print(error.localizedDescription)
}
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