Question

处理json响应时，我得到以下错误：

***因未捕获的异常终止应用＆＃39; NSInvalidArgumentException＆＃39;，原因：＆＃39; - [DADGList setDescription：]：无法识别的选择器发送到实例0x7ae88880＆＃39;

它崩溃的课程：

@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dictonary：

Answer 1

您应该将您的description属性重命名为其他内容，因为这是iOS回声系统中已存在的字段（NSObject，如果我没有记错的话）并且会产生类似这种奇怪的崩溃。

Answer 2

如果您使用的是 core data，您可能需要实现以下实例：

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，将无法识别的选择器发送到实例

2 个答案: