iOS AVObject 关联 file 异步保存，只保存 file

[ycui]

for(NSDictionary* dict in fishs)
        {
            AVObject * fish = [AVObject objectWithClassName:@"Fish"];
            fish[@"name"] = dict[@"name"];
            fish[@"fish_code"] = dict[@"code"];
            
            NSString* path = [[NSBundle mainBundle] pathForResource:fish[@"code"] ofType:@"jpg" inDirectory:@"fish images"];
            if(path)
            {
                AVFile* image = [AVFile fileWithData:[NSData dataWithContentsOfFile:path]];
                fish[@"image"] = image;
            }
            
            [fish saveInBackground];
        }

https://leanticket.cn/t/leancloud/1007