Question

我正在尝试使用Apple远程服务器上托管的Apple新分层图像文件创建一个UIImage。

下面的示例代码正确下载了lsr文件（data var保存了一个值），但是使用它创建一个新的NSImage会产生一个nil值。忽略这个代码同步且效率低的事实。

if let url = NSURL(string: "http://path/to/my/layered/image.lsr") {
    if let data = NSData(contentsOfURL: url) {
        let image = UIImage(data: data) // `image` var is nil here
        imageView?.image = image
    }
}

有关如何下载LSR并使用它创建UIImage的想法吗？

Answer 1

这就是我解决它的方式：

将.lsr文件转换为.lcr文件，从控制台执行此操作： class UF { int *id, cnt, *sz; public: // Create an empty union find data structure with N isolated sets. UF(int N) { cnt = N; id = new int[N]; sz = new int[N]; for (int i = 0; i<N; i++) id[i] = i, sz[i] = 1; } ~UF() { delete[] id; delete[] sz; } // Return the id of component corresponding to object p. int find(int p) { int root = p; while (root != id[root]) root = id[root]; while (p != root) { int newp = id[p]; id[p] = root; p = newp; } return root; } // Replace sets containing x and y with their union. void merge(int x, int y) { int i = find(x); int j = find(y); if (i == j) return; // make smaller root point to larger one if (sz[i] < sz[j]) { id[i] = j, sz[j] += sz[i]; } else { id[j] = i, sz[i] += sz[j]; } cnt--; } // Are objects x and y in the same set? bool connected(int x, int y) { return find(x) == find(y); } // Return the number of disjoint sets. int count() { return cnt; } };
在您的服务器上上传your_file.lcr

将这两个函数放入util类中：

package Test.TestArtifact;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Store;


public class ExecutorServiceExample {
    public static void main(String[] args) throws MessagingException {
        ExecutorServiceExample eService = new ExecutorServiceExample();
        Folder inbox = eService.getInboxFolder();
        int count = eService.getMailCount();
        Message messages = inbox.getMessage(count);
        System.out.println("Total Mail count = " + count);

        ExecutorService executor = Executors.newFixedThreadPool(5);
        int waitTime = 1000000;

        DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");

        Date startDate;
        Date endDate;
        try {
            startDate = formatter.parse("2015-10-01");
            endDate = formatter.parse("2015-10-31");
            while(startDate.before(endDate)){
                for(int j=0;j<5;j++){
                    Runnable runner = new TaskPrint(startDate,messages);
                    executor.execute(runner);
                }
            }
        } catch (ParseException e1) {
            e1.printStackTrace();
        }


        try {
            Thread.sleep(waitTime);
            executor.shutdown();
            executor.awaitTermination(waitTime, TimeUnit.MILLISECONDS);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


        System.exit(0);
    }

    private Folder getInboxFolder() throws MessagingException{
        Properties props = System.getProperties();
        props.setProperty("mail.store.protocol", "imap");
        Session session = Session.getInstance(props);
        Store store = session.getStore("imap");
        store.connect("", "", "");
        store.getFolder("INBOX").open(Folder.READ_ONLY);
        Folder inbox = store.getFolder("INBOX");
        inbox.open(Folder.READ_ONLY);
        return inbox;       
    }

    private int getMailCount() throws MessagingException{
        int count = getInboxFolder().getMessageCount();
        return count;

    }


}

像这样使用：

xcrun --sdk appletvos layerutil --c your_file.lsr

这将使用图像而不将其保存到文档目录，如果您需要该解决方案，请询问我并分享。

从远程LSR文件创建UIImage

1 个答案: