我有两个不同的应用程序(一个用Objective-C编写,一个用Swift编写),它们共享一些数据。我决定通过iCloud进行同步。要同步的项目打包在一个数组中,然后保存到文件中。在同步Objective-C应用程序时,一切都按预期工作,但当我尝试在Swift应用程序中下载文件时,我收到以下错误:
由于未捕获的异常'NSInvalidUnarchiveOperationException'终止应用程序,原因:'*** - [NSKeyedUnarchiver decodeObjectForKey:]:无法解码类(收藏夹)对象的密钥(NS.objects);该类可以在源代码中定义,也可以在未链接的库中定义
以下是Favourite
个类:
目标C:
@interface Favourite : NSObject
@property(retain,nonatomic) NSString* mArtikeltext;
@property(retain,nonatomic) NSString* mRid;
-(instancetype) initWithObject:(NSMutableDictionary*) object;
@end
.m:
@implementation Favourite
-(instancetype) initWithObject:(NSMutableDictionary *)object{
self = [super init];
if(self){
self.mArtikeltext = [object valueForKey:@"mArtikeltext"];
self.mRid = [object valueForKey:@"mRid"];
}
return self;
}
- (void)encodeWithCoder:(NSCoder *) coder
{
[coder encodeObject:self.mArtikeltext forKey:@"mArtikeltext"];
[coder encodeObject:self.mRid forKey:@"mRid"];
}
- (id)initWithCoder:(NSCoder *)decoder {
if (self = [super init]) {
self.mArtikeltext = (NSString *)[decoder decodeObjectForKey:@"mArtikeltext"];
self.mRid = (NSString *)[decoder decodeObjectForKey:@"mRid"];
}
return self;
}
@end
斯威夫特:
class Favourite: NSObject, NSCoding {
var mArtikeltext: String = ""
var mRid: String = ""
init(object: [String: AnyObject]) throws {
super.init()
guard case let (text as String, rid as String) = (object["mArtikelText"], object["mRid"]) else {
throw JSONResponseError.NilResponseValue
}
self.mArtikeltext = text
self.mRid = rid
}
required init?(coder aDecoder: NSCoder) {
super.init()
self.mArtikeltext = aDecoder.decodeObjectForKey("mArtikeltext") as! String
self.mRid = aDecoder.decodeObjectForKey("mRid") as! String
}
func encodeWithCoder(aCoder: NSCoder) {
aCoder.encodeObject(self.mArtikeltext, forKey: "mArtikeltext")
aCoder.encodeObject(self.mRid, forKey: "mRid")
}
}
这就是我在Swift中取消归档数据的方式:
let cloudFavs: [Favourite] = NSKeyedUnarchiver.unarchiveObjectWithData(data) as! [Favourite]
并在Objective-C中:
NSArray *favs = [NSKeyedUnarchiver unarchiveObjectWithData:data];
如何修复错误?
答案 0 :(得分:0)
好的,经过一番挖掘后,我找到了答案。我必须在swift类中声明Objective-C类名,如下所示:
@objc(Favourite)
class Favourite: NSObject, NSCoding {
// and so on..
这解决了这个问题。