Core data 设置NSManagedObject的Bool属性抛出;iOS 10中的未捕获异常”;
我正在将我的应用升级到iOS 10/swift 3 因此,以这种方式使用字典(从远程数据库接收的值)构造一个Core data 设置NSManagedObject的Bool属性抛出;iOS 10中的未捕获异常”;,core-data,swift3,xcode8,ios10,Core Data,Swift3,Xcode8,Ios10,我正在将我的应用升级到iOS 10/swift 3 因此,以这种方式使用字典(从远程数据库接收的值)构造一个NSManagedObject let writerDictionary = [ ...: writer.id, ...: writer.name, ...: writer.picture, ...: writer.publicationID, ...: writer.language,
NSManagedObject
let writerDictionary = [
...: writer.id,
...: writer.name,
...: writer.picture,
...: writer.publicationID,
...: writer.language,
...: writer.country
]
let newWriter = Writer(dictionary: writerDictionary, context: SHARED_CONTEXT)
isFavorite
是一个NSManaged
属性,我在构建newWriter
对象之后,在保存上下文之前,用newWriter.isFavorite=true
手动将其设置为true
这条线在iOS 10中意外崩溃-之前iOS 9没有任何问题
我还尝试了newWriter.setValue(true,forKey:“isFavorite”)
——虽然它不会使应用程序崩溃,但bool值isFavorite
保持false
不变
有什么想法吗?这是我的NSManagedObject的Writer子类
import UIKit
import CoreData
@objc(Writer)
class Writer: NSManagedObject {
// Attributes also in the database
@NSManaged var id: NSNumber
@NSManaged var name: String
@NSManaged var picture: String?
@NSManaged var publicationID: NSNumber
@NSManaged var language: String
@NSManaged var country: String
@NSManaged var lastArticle: Date
// Attributes only in the iOS app
@NSManaged var isFavorite: Bool // Initial value is false
@NSManaged var hasNewArticles: Bool
// Relationship objects
@NSManaged var publication: Publication
@NSManaged var articles: [Article]
var writerImage: UIImage? {
get {
return ImageCache.sharedCache.imageWithIdentifier("writers-" + String(id))
}
set {
ImageCache.sharedCache.storeImage(newValue, withIdentifier: "writers-" + String(id))
}
}
override init(entity: NSEntityDescription, insertInto context: NSManagedObjectContext?) {
super.init(entity: entity, insertInto: context)
}
init(dictionary: [String : AnyObject], context: NSManagedObjectContext) {
let entity = NSEntityDescription.entity(forEntityName: "Writer", in: context)!
super.init(entity: entity, insertInto: context)
id = ...
name = ...
picture = ...
publicationID = ...
language = ...
country = ...
lastArticle = ...
}
override func prepareForDeletion() {
if let _ = writerImage {
writerImage = nil
}
}
}
解决方案 当前版本的Swift 3 beta在处理前缀为“is”的属性方面似乎存在一些缺陷 像这样调整属性的名称,解决了它
@NSManaged @objc(isFavorite) var isFavorite: Bool
在Xcode 8 beta 3编译器中修复 从发行说明中: 早期的Swift 3 Beta隐式地重命名了属性getter和 名称以开头的Bool类型@objc属性的setter “is”,以匹配Objective-C命名约定。(例如 名为isMagical的Swift布尔属性生成了Objective-C 形式@property(非原子,getter=isMagical)BOOL的声明 (神奇的)结果是,这造成的麻烦超过了它的价值和价值 已被删除。(26847223)
“未捕获异常”不是崩溃原因。例外情况的详细信息是什么?什么都没有!这就是我在控制台中得到的全部信息。“libc++abi.dylib:以NSException类型的未捕获异常终止”在异常上放置一个断点,看看它在哪里崩溃。当我尝试在
newWriter.isFavorite=true
中将isFavorite
属性设置为true时,它崩溃了。控制台除了上面双引号之间的一行之外,没有给出任何东西。转到堆栈跟踪中的最新一行(在左侧)和调试器类型中“po$arg1”该死,这是我的var的问题,它是数据…原始@NSManaged var jsonData:NSData
工作@NSManaged@objc(jsonData)var jsonData:NSData