无论如何，在iOS上是否找到孤立对象的所有者？

Question

我一直试图找出如何找到保留该对象的东西。但是似乎再也没有引用它了，那么它如何保留呢？它在仪器和内存调试器中均显示为泄漏。

对于内存调试器来说，是否有可能没有被符号化的东西，以找出保留它的原因？是什么会导致像这样的孤立物体？

注意：我正在使用领域，但是此对象不直接与领域相关联。 （只需为此特定对象使用RLM前缀）。

Answer 1

您的对象可能会保留自身。使用闭包时很容易发生这种情况。确保像这样在闭包中显式地标注自己的弱点：

someFunc() { [weak self] in
    // some code
    self?.propertyOnSelf
}

Answer 2

这是一个艰难的过程，但我想我找到了答案。因此，我有一个AnyObjects（[AnyObject]）的通用数组，并且我“知道”这些是可哈希值。我当时的想法是可以做的：  /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package groupchatapp; /** * * @author Jim Ng */ public class ChatInterface extends javax.swing.JFrame { /** * Creates new form GroupChatGUI */ /** * This method is called from within the constructor to initialize the form. * WARNING: Do NOT modify this code. The content of this method is always * regenerated by the Form Editor. */ // <editor-fold defaultstate="collapsed" desc="Generated Code"> private void initComponents() { TalkIcon = new javax.swing.JLabel(); TalkIcon1 = new javax.swing.JLabel(); usersLbl = new javax.swing.JLabel(); GroupsLbl = new javax.swing.JLabel(); GroupChatsLbl = new javax.swing.JLabel(); groupNameLbl = new javax.swing.JLabel(); groupLblWhiteBg = new javax.swing.JLabel(); userLblWhiteBg = new javax.swing.JLabel(); groupsScrollPane = new javax.swing.JScrollPane(); groupChatList = new java.awt.List(); groupNameScrollPane = new javax.swing.JScrollPane(); allMessagesTextField = new java.awt.TextField(); viewBtn = new java.awt.Button(); deleteChatBtn = new java.awt.Button(); editChatBtn = new java.awt.Button(); createNewBtn = new java.awt.Button(); typeMessageTextField = new java.awt.TextField(); sendBtn1 = new java.awt.Button(); addBtn1 = new java.awt.Button(); GardensByTheBayBG = new javax.swing.JLabel(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); getContentPane().setLayout(null); TalkIcon.setBackground(new java.awt.Color(255, 255, 255)); TalkIcon.setForeground(new java.awt.Color(255, 255, 255)); TalkIcon.setIcon(new javax.swing.ImageIcon(getClass().getResource("/groupchatapp/TalkIcon.png"))); // NOI18N getContentPane().add(TalkIcon); TalkIcon.setBounds(310, 0, 190, 200); TalkIcon1.setBackground(new java.awt.Color(255, 255, 255)); TalkIcon1.setForeground(new java.awt.Color(255, 255, 255)); TalkIcon1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/groupchatapp/GroupIcon.png"))); // NOI18N TalkIcon1.setPreferredSize(new java.awt.Dimension(30, 30)); getContentPane().add(TalkIcon1); TalkIcon1.setBounds(250, 210, 50, 50); usersLbl.setBackground(new java.awt.Color(255, 255, 255)); usersLbl.setFont(new java.awt.Font("Tahoma", 0, 36)); // NOI18N usersLbl.setHorizontalAlignment(javax.swing.SwingConstants.CENTER); usersLbl.setText("Users"); getContentPane().add(usersLbl); usersLbl.setBounds(610, 210, 130, 50); GroupsLbl.setBackground(new java.awt.Color(255, 255, 255)); GroupsLbl.setFont(new java.awt.Font("Tahoma", 0, 36)); // NOI18N GroupsLbl.setHorizontalAlignment(javax.swing.SwingConstants.CENTER); GroupsLbl.setText("Groups"); getContentPane().add(GroupsLbl); GroupsLbl.setBounds(70, 200, 160, 70); GroupChatsLbl.setBackground(new java.awt.Color(255, 255, 255)); GroupChatsLbl.setFont(new java.awt.Font("Tahoma", 0, 36)); // NOI18N GroupChatsLbl.setHorizontalAlignment(javax.swing.SwingConstants.CENTER); GroupChatsLbl.setText("Group Name"); getContentPane().add(GroupChatsLbl); GroupChatsLbl.setBounds(240, 200, 370, 70); groupNameLbl.setBackground(new java.awt.Color(255, 255, 255)); groupNameLbl.setForeground(new java.awt.Color(255, 255, 255)); groupNameLbl.setIcon(new javax.swing.ImageIcon(getClass().getResource("/groupchatapp/WhiteBackground.PNG"))); // NOI18N groupNameLbl.setText("Ty"); getContentPane().add(groupNameLbl); groupNameLbl.setBounds(240, 210, 360, 50); groupLblWhiteBg.setBackground(new java.awt.Color(255, 255, 255)); groupLblWhiteBg.setForeground(new java.awt.Color(255, 255, 255)); groupLblWhiteBg.setIcon(new javax.swing.ImageIcon(getClass().getResource("/groupchatapp/WhiteBackground.PNG"))); // NOI18N groupLblWhiteBg.setText("Ty"); getContentPane().add(groupLblWhiteBg); groupLblWhiteBg.setBounds(70, 210, 160, 50); userLblWhiteBg.setBackground(new java.awt.Color(255, 255, 255)); userLblWhiteBg.setForeground(new java.awt.Color(255, 255, 255)); userLblWhiteBg.setIcon(new javax.swing.ImageIcon(getClass().getResource("/groupchatapp/WhiteBackground.PNG"))); // NOI18N userLblWhiteBg.setText("Ty"); getContentPane().add(userLblWhiteBg); userLblWhiteBg.setBounds(610, 210, 130, 50); groupsScrollPane.setViewportView(groupChatList); getContentPane().add(groupsScrollPane); groupsScrollPane.setBounds(70, 270, 160, 230); allMessagesTextField.setFont(new java.awt.Font("Dialog", 0, 24)); // NOI18N groupNameScrollPane.setViewportView(allMessagesTextField); getContentPane().add(groupNameScrollPane); groupNameScrollPane.setBounds(240, 270, 360, 190); viewBtn.setBackground(new java.awt.Color(255, 0, 0)); viewBtn.setFont(new java.awt.Font("Dialog", 0, 24)); // NOI18N viewBtn.setForeground(new java.awt.Color(255, 255, 255)); viewBtn.setLabel("View"); getContentPane().add(viewBtn); viewBtn.setBounds(630, 460, 90, 40); deleteChatBtn.setBackground(new java.awt.Color(255, 0, 0)); deleteChatBtn.setForeground(new java.awt.Color(255, 255, 255)); deleteChatBtn.setLabel("Delete"); getContentPane().add(deleteChatBtn); deleteChatBtn.setBounds(120, 540, 70, 20); editChatBtn.setBackground(new java.awt.Color(255, 0, 0)); editChatBtn.setForeground(new java.awt.Color(255, 255, 255)); editChatBtn.setLabel("Edit"); editChatBtn.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { editChatBtnActionPerformed(evt); } }); getContentPane().add(editChatBtn); editChatBtn.setBounds(160, 510, 70, 20); createNewBtn.setBackground(new java.awt.Color(255, 0, 0)); createNewBtn.setForeground(new java.awt.Color(255, 255, 255)); createNewBtn.setLabel("Create"); createNewBtn.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { createNewBtnActionPerformed(evt); } }); getContentPane().add(createNewBtn); createNewBtn.setBounds(70, 510, 70, 20); typeMessageTextField.setFont(new java.awt.Font("Dialog", 0, 24)); // NOI18N typeMessageTextField.setText("type your message here..."); getContentPane().add(typeMessageTextField); typeMessageTextField.setBounds(240, 460, 360, 40); sendBtn1.setBackground(new java.awt.Color(255, 0, 0)); sendBtn1.setFont(new java.awt.Font("Dialog", 0, 24)); // NOI18N sendBtn1.setForeground(new java.awt.Color(255, 255, 255)); sendBtn1.setLabel("Send"); getContentPane().add(sendBtn1); sendBtn1.setBounds(510, 510, 90, 40); addBtn1.setBackground(new java.awt.Color(255, 0, 0)); addBtn1.setFont(new java.awt.Font("Dialog", 0, 24)); // NOI18N addBtn1.setForeground(new java.awt.Color(255, 255, 255)); addBtn1.setLabel("Add"); getContentPane().add(addBtn1); addBtn1.setBounds(410, 510, 90, 40); GardensByTheBayBG.setIcon(new javax.swing.ImageIcon(getClass().getResource("/groupchatapp/Singapore Garden City.jpg"))); // NOI18N getContentPane().add(GardensByTheBayBG); GardensByTheBayBG.setBounds(0, -210, 2260, 1090); pack(); }// </editor-fold> private void createNewBtnActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: } private void editChatBtnActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: } /** * @param args the command line arguments */ public static void main(String args[]) { /* Set the Nimbus look and feel */ //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html */ try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(ChatInterface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(ChatInterface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(ChatInterface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(ChatInterface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } //</editor-fold> //</editor-fold> //</editor-fold> //</editor-fold> /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new ChatInterface().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JLabel GardensByTheBayBG; private javax.swing.JLabel GroupChatsLbl; private javax.swing.JLabel GroupsLbl; private javax.swing.JLabel TalkIcon; private javax.swing.JLabel TalkIcon1; private java.awt.Button addBtn1; private java.awt.TextField allMessagesTextField; private java.awt.Button createNewBtn; private java.awt.Button deleteChatBtn; private java.awt.Button editChatBtn; private java.awt.List groupChatList; private javax.swing.JLabel groupLblWhiteBg; private javax.swing.JLabel groupNameLbl; private javax.swing.JScrollPane groupNameScrollPane; private javax.swing.JScrollPane groupsScrollPane; private java.awt.Button sendBtn1; private java.awt.TextField typeMessageTextField; private javax.swing.JLabel userLblWhiteBg; private javax.swing.JLabel usersLbl; private java.awt.Button viewBtn; // End of variables declaration

这可以编译并可以正常工作，但这实际上会导致内存泄漏！我假设Swift内部内部正在发生某些事情导致此问题。也许我可以将其放在一个密闭文件中，以证明泄漏。如果将每个Hashable值传递给AnyHashable（object），没有任何泄漏。

不幸的是，我仍然需要找到一种方法来强制我的通用AnyObject值可哈希化。