Question

我有这个简单的课程

btnPass.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent(getApplicationContext(), SecondActivity.class);
                intent.putExtra("data",tvmername.getText().toString());
                startActivity(intent);

            }
        });


        /*---------------------*/

        public class MovieAdapter extends ArrayAdapter {

            private List<CarrotModel> carrotModelList;
            private int resource;

            private LayoutInflater inflater;

            public MovieAdapter(Context context, int resource, List<CarrotModel> objects) {
                super(context, resource, objects);
                carrotModelList = objects;
                this.resource = resource;
                inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
            }

            @Override
            public View getView(int position, View convertView, ViewGroup parent) {

                if (convertView == null) {
                    convertView = inflater.inflate(resource, null);
                }

                ImageView ivIcon;
                TextView tvDiscount;
                TextView tvDealDesc;
                TextView tvOfftoDis;
                TextView tvmeradd;


                ivIcon = (ImageView) convertView.findViewById(R.id.ivIcon);

                tvDiscount = (TextView) convertView.findViewById(R.id.tvDiscount);
                tvmername = (TextView) convertView.findViewById(R.id.tvMerName);
                tvDealDesc = (TextView) convertView.findViewById(R.id.tvDealDesc);
                tvOfftoDis = (TextView) convertView.findViewById(R.id.tvOftoDis);
                tvmeradd = (TextView) convertView.findViewById(R.id.tvmeradd);

                ImageLoader.getInstance().displayImage(carrotModelList.get(position).getImageURL(), ivIcon);
                tvDiscount.setText(carrotModelList.get(position).getDiscount() + "% OFF");
                tvmername.setText(carrotModelList.get(position).getMerchantName());
                tvDealDesc.setText(carrotModelList.get(position).getDealDescription());
                tvOfftoDis.setText(carrotModelList.get(position).getOffersToDisplay());
                tvmeradd.setText(carrotModelList.get(position).getMerchantAddress());


                return convertView;
            }
        }

        /**
         * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
         * one of the sections/tabs/pages.
         */
        public class SectionsPagerAdapter extends FragmentPagerAdapter {

            public SectionsPagerAdapter(FragmentManager fm) {
                super(fm);
            }

            @Override
            public Fragment getItem(int position) {
                new JSONTask().execute("https://api.appery.io/rest/1/code/39aea091-00d8-4e02-af39-93d63f965d08/exec?ConponFor=normal");
                // getItem is called to instantiate the fragment for the given page.
                // Return a PlaceholderFragment (defined as a static inner class below).
                return PlaceholderFragment.newInstance(position + 1);
            }

            @Override
            public int getCount() {
                // Show 3 total pages.
                return 3;
            }

            @Override
            public CharSequence getPageTitle(int position) {
                switch (position) {
                    case 0:
                        new JSONTask().execute("https://api.appery.io/rest/1/code/39aea091-00d8-4e02-af39-93d63f965d08/exec?ConponFor=normal");
                        return "Deals";
                    case 1:
                        return "SECTION 2";
                    case 2:
                        return "SECTION 3";
                }
                return null;
            }
        }

保存代码：

import UIKit

class SimpleModel: NSObject, NSCoding {

    var name : String!
    var done : Bool!

    init(name:String) {
        self.name = name
        self.done = false
    }

    internal required init?(coder aDecoder: NSCoder) {
        self.name = aDecoder.decodeObject(forKey: "name") as! String
        self.done = aDecoder.decodeBool(forKey: "done") // BUG HERE
    }

    func encode(with encoder: NSCoder) {
        encoder.encode(self.name, forKey: "name")
        encoder.encode(self.done, forKey: "done")
    }
}

读取代码：

let data = NSKeyedArchiver.archivedData(withRootObject: storageArray)
UserDefaults.standard.set(data, forKey: "storage")
UserDefaults.standard.synchronize()

当NSKeyedUnarchiver完成它的工作时会出现问题。我无法理解问题的来源。

谢谢！

Answer 1

诀窍就是删除！形成原始类型。如果你把！你说“制作一个隐式解包的可选项”，因此编码器将存档为NSNumber而不是Bool（或Int，Double）。如果你删除！编码器将存档为Bool，事情按预期工作（我花了一个“事件”，这个解决方案由Apple提供）

Answer 2

Bool和Int有新方法：

 self.x = Int(decoder.decodeCInt(forKey: "Speed"))
 self.y = decoder.decodeObject(forKey: "Serial") as! String
 self.z = Bool(decoder.decodeBool(forKey: "Direction") )

Answer 3

我遇到了同样的问题。试试这个：

self.done = aDecoder.decodeObject(forKey: "done") as? Bool ?? aDecoder.decodeBool(forKey: "done")

NSBder在decodeBool forKey上崩溃（Xcode 8，Swift 3）

3 个答案: