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

Question

在处理 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'

它崩溃的类:

@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

您应该将您的 description 属性重命名为其他内容，因为这是一个已经存在于 iOS 回声系统中的字段(如果我没记错的话是 NSObject)并且会造成像这样的各种奇怪的崩溃。