diff --git a/LaserMethane.xcworkspace/xcuserdata/a203.xcuserdatad/UserInterfaceState.xcuserstate b/LaserMethane.xcworkspace/xcuserdata/a203.xcuserdatad/UserInterfaceState.xcuserstate
index b6d908d..92b401c 100644
--- a/LaserMethane.xcworkspace/xcuserdata/a203.xcuserdatad/UserInterfaceState.xcuserstate
+++ b/LaserMethane.xcworkspace/xcuserdata/a203.xcuserdatad/UserInterfaceState.xcuserstate
Binary files differ

diff --git a/LaserMethane.xcworkspace/xcuserdata/a203.xcuserdatad/UserInterfaceState.xcuserstate b/LaserMethane.xcworkspace/xcuserdata/a203.xcuserdatad/UserInterfaceState.xcuserstate
index b6d908d..92b401c 100644
--- a/LaserMethane.xcworkspace/xcuserdata/a203.xcuserdatad/UserInterfaceState.xcuserstate
+++ b/LaserMethane.xcworkspace/xcuserdata/a203.xcuserdatad/UserInterfaceState.xcuserstate
Binary files differ
diff --git a/LaserMethane/ViewController/Settings/SettingViewController.swift b/LaserMethane/ViewController/Settings/SettingViewController.swift
index 726985c..6bb7d34 100644
--- a/LaserMethane/ViewController/Settings/SettingViewController.swift
+++ b/LaserMethane/ViewController/Settings/SettingViewController.swift
@@ -8,6 +8,7 @@
 import Alamofire
 import AudioToolbox
 import KeychainAccess
+import SnapKit
 import SwiftyJSON
 import UIKit
 
@@ -50,7 +51,7 @@
 
     func addFooterButton() {
         // 先添加View，然后再在View里面添加UIButton
-        let footerView = UIView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 200))
+        let footerView = UIView(frame: CGRect(x: 0, y: 0, width: SCREEN_WIDTH, height: SCREEN_HEIGHT - 57 * 6))
 
         let button = UIButton(type: .roundedRect)
         button.setTitle("退出登录", for: .normal)
@@ -58,10 +59,13 @@
         button.titleLabel?.font = UIFont.systemFont(ofSize: CGFloat(20))
         button.layer.cornerRadius = 18.0
         button.backgroundColor = .systemBlue
-        button.frame = CGRect(x: 35, y: 100, width: 320, height: 36)
         button.addTarget(self, action: #selector(loginOutAction), for: .touchUpInside)
-
         footerView.addSubview(button)
+        button.snp.makeConstraints { (make) -> Void in
+            make.size.equalTo(CGSize(width: 320, height: 36))
+            make.centerX.equalToSuperview()
+            make.top.equalTo(footerView.frame.height * 0.6)
+        }
         tableView.tableFooterView = footerView
     }
 

diff --git a/LaserMethane.xcworkspace/xcuserdata/a203.xcuserdatad/UserInterfaceState.xcuserstate b/LaserMethane.xcworkspace/xcuserdata/a203.xcuserdatad/UserInterfaceState.xcuserstate
index b6d908d..92b401c 100644
--- a/LaserMethane.xcworkspace/xcuserdata/a203.xcuserdatad/UserInterfaceState.xcuserstate
+++ b/LaserMethane.xcworkspace/xcuserdata/a203.xcuserdatad/UserInterfaceState.xcuserstate
Binary files differ
diff --git a/LaserMethane/ViewController/Settings/SettingViewController.swift b/LaserMethane/ViewController/Settings/SettingViewController.swift
index 726985c..6bb7d34 100644
--- a/LaserMethane/ViewController/Settings/SettingViewController.swift
+++ b/LaserMethane/ViewController/Settings/SettingViewController.swift
@@ -8,6 +8,7 @@
 import Alamofire
 import AudioToolbox
 import KeychainAccess
+import SnapKit
 import SwiftyJSON
 import UIKit
 
@@ -50,7 +51,7 @@
 
     func addFooterButton() {
         // 先添加View，然后再在View里面添加UIButton
-        let footerView = UIView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 200))
+        let footerView = UIView(frame: CGRect(x: 0, y: 0, width: SCREEN_WIDTH, height: SCREEN_HEIGHT - 57 * 6))
 
         let button = UIButton(type: .roundedRect)
         button.setTitle("退出登录", for: .normal)
@@ -58,10 +59,13 @@
         button.titleLabel?.font = UIFont.systemFont(ofSize: CGFloat(20))
         button.layer.cornerRadius = 18.0
         button.backgroundColor = .systemBlue
-        button.frame = CGRect(x: 35, y: 100, width: 320, height: 36)
         button.addTarget(self, action: #selector(loginOutAction), for: .touchUpInside)
-
         footerView.addSubview(button)
+        button.snp.makeConstraints { (make) -> Void in
+            make.size.equalTo(CGSize(width: 320, height: 36))
+            make.centerX.equalToSuperview()
+            make.top.equalTo(footerView.frame.height * 0.6)
+        }
         tableView.tableFooterView = footerView
     }
 
diff --git a/LaserMethane/ViewController/Settings/SingModeSettingViewController.swift b/LaserMethane/ViewController/Settings/SingModeSettingViewController.swift
index 269ac39..88d09ae 100644
--- a/LaserMethane/ViewController/Settings/SingModeSettingViewController.swift
+++ b/LaserMethane/ViewController/Settings/SingModeSettingViewController.swift
@@ -7,6 +7,7 @@
 
 import AudioToolbox
 import KeychainAccess
+import SnapKit
 import UIKit
 
 class SingModeSettingViewController: UIViewController {
@@ -28,8 +29,35 @@
         tableView.register(UINib(nibName: "SwitchTableViewCell", bundle: nil), forCellReuseIdentifier: "switchTableViewCell")
         tableView.dataSource = self
         tableView.delegate = self
-        // 去掉tableView底部多余的线
-        tableView.tableFooterView = UIView(frame: CGRect.zero)
+        // 添加底部按钮
+        addFooterButton()
+    }
+
+    func addFooterButton() {
+        // 先添加View，然后再在View里面添加UIButton
+        let footerView = UIView(frame: CGRect(x: 0, y: 0, width: SCREEN_WIDTH, height: SCREEN_HEIGHT - 57 * 3))
+
+        let button = UIButton(type: .roundedRect)
+        button.setTitle("回到登录页", for: .normal)
+        button.setTitleColor(.white, for: .normal)
+        button.titleLabel?.font = UIFont.systemFont(ofSize: CGFloat(20))
+        button.layer.cornerRadius = 18.0
+        button.backgroundColor = .systemBlue
+        button.addTarget(self, action: #selector(toLoginViewController), for: .touchUpInside)
+        footerView.addSubview(button)
+        button.snp.makeConstraints { (make) -> Void in
+            make.size.equalTo(CGSize(width: 320, height: 36))
+            make.centerX.equalToSuperview()
+            make.top.equalTo(footerView.frame.height * 0.7)
+        }
+        tableView.tableFooterView = footerView
+    }
+
+    @objc func toLoginViewController(_ sender: UIButton) {
+        let destinationController = LoginViewController(nibName: "LoginViewController", bundle: nil)
+        destinationController.modalPresentationStyle = UIModalPresentationStyle.fullScreen
+        destinationController.modalTransitionStyle = UIModalTransitionStyle.coverVertical
+        present(destinationController, animated: true, completion: nil)
     }
 }