NSInvalidArgumentException，无法识别的选择器发送到实例的原因

Question

处理 json 响应时出现以下错误：

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[DADGList setDescription:]: unrecognized selector sent to instance 0x7ae88880'

崩溃的class：

@implementation DADGList

-(id)copy
{
    DADGList *list = [[DADGList alloc] init];
    list.identifier = self.identifier;
    list.name = [self.name copy];
    list.description = [self.description copy];
    list.created = [self.created copy];
    list.itemCount = self.itemCount;
    list.shareLink = [self.shareLink copy];

    return list;
}

+(DADGList *)listFromDictonary:(NSDictionary *)dictonary
{
    DADGList *list = [[DADGList alloc] init];
    NSLog( @"%@", dictonary );
    list.identifier = [[dictonary objectForKey:@"list_id"] integerValue];
    list.itemCount = [[dictonary objectForKey:@"list_items_count"] integerValue];
    list.name = [NSString stringWithString:[dictonary objectForKey:@"list_name"]];
    list.description = [NSString stringWithString:[dictonary objectForKey:@"list_description"]];
    list.created = [[NSDate alloc] initWithTimeIntervalSince1970:[[dictonary objectForKey:@"list_created"] doubleValue]];
    list.shareLink = [NSString stringWithString:[dictonary objectForKey:@"list_share_url"]];

    return list;
}

和 listFromDictonary 过去的字典：

Answer 1

您应该将 description 属性重命名为其他名称，因为这是 iOS 回声系统（如果我没记错的话是 NSObject）中已经存在的字段，并且会创建所有类型像这样的奇怪崩溃。

Answer 2

如果您正在使用 core data，您可能需要实施以下实例：

Mall(entity: NSEntityDescription.entity(forEntityName: "Mall", in: context)!, insertInto: nil)

其中 Mall 是我的实体，context 是我的视图上下文。

NSInvalidArgumentException，无法识别的选择器发送到实例的原因

NSInvalidArgumentException, reason unrecognized selector sent to instance

ios

objective-c

unrecognized-selector