diff --git a/VoidLink/Input/SafeTimer.swift b/VoidLink/Input/SafeTimer.swift
index 3a9436db..80f69767 100644
--- a/VoidLink/Input/SafeTimer.swift
+++ b/VoidLink/Input/SafeTimer.swift
@@ -9,8 +9,8 @@
 import Foundation
 import QuartzCore
 
-/// SafeTimer: 高精度、可暂停/重启、可彻底清理
-final class SafeTimer {
+@objc(SafeTimer)
+final class SafeTimer: NSObject {
     private var timer: DispatchSourceTimer?
     private let timerQueue: DispatchQueue       // 私有串行队列
     private let userHandler: () -> Void
@@ -20,7 +20,7 @@ final class SafeTimer {
     private var shouldRunHandler: Bool = false  // 控制逻辑上的暂停/恢复
     private var isCleaned: Bool = false         // 是否已经 clean
 
-    init(interval: TimeInterval = 1.0,
+    @objc init(interval: TimeInterval = 1.0,
          delay: TimeInterval = 0,
          queueLabel: String = "com.example.safetimer",
          handler: @escaping () -> Void) {
@@ -29,6 +29,8 @@ final class SafeTimer {
         self.delay = delay
         self.userHandler = handler
         self.timerQueue = DispatchQueue(label: queueLabel)
+        
+        super.init()
 
         let t = DispatchSource.makeTimerSource(queue: timerQueue)
         t.schedule(deadline: .now() + delay, repeating: interval)
@@ -48,7 +50,7 @@ final class SafeTimer {
     }
 
     /// 开始逻辑上的计时
-    func start() {
+    @objc func start() {
         timerQueue.async { [weak self] in
             guard let self = self, !self.isCleaned else { return }
             self.shouldRunHandler = true
@@ -56,7 +58,7 @@ final class SafeTimer {
     }
 
     /// 暂停逻辑上的计时
-    func pause() {
+    @objc func pause() {
         timerQueue.async { [weak self] in
             guard let self = self, !self.isCleaned else { return }
             self.shouldRunHandler = false
@@ -64,7 +66,7 @@ final class SafeTimer {
     }
 
     /// 重置下一次触发时间，并开始执行 handler
-    func restart() {
+    @objc func restart() {
         timerQueue.async { [weak self] in
             guard let self = self, let t = self.timer, !self.isCleaned else { return }
             t.schedule(deadline: .now() + self.delay, repeating: self.interval)
@@ -73,7 +75,7 @@ final class SafeTimer {
     }
 
     /// 彻底清理 timer，返回后保证 handler 不再执行
-    func clean() {
+    @objc func clean() {
         if isCleaned { return }
         // 同步在 timerQueue 执行，保证已排队事件全部处理完（或跳过）
         timerQueue.sync {
diff --git a/VoidLink/ViewControllers/StreamFrameViewController.m b/VoidLink/ViewControllers/StreamFrameViewController.m
index c994d093..24ecfa8f 100644
--- a/VoidLink/ViewControllers/StreamFrameViewController.m
+++ b/VoidLink/ViewControllers/StreamFrameViewController.m
@@ -80,7 +80,7 @@
     dispatch_block_t _delayedRemoveExtScreen;
     VideoDecoderRenderer *_videoRenderer;
     BOOL _isRestoringFromPiP;
-    CADisplayLink *_displayLink;
+    SafeTimer* safeTimer;
 
 #if !TARGET_OS_TV
     CustomEdgeSlideGestureRecognizer *_slideToSettingsRecognizer;
@@ -439,11 +439,12 @@
         [self.view bringSubviewToFront:self.imguiView.mtkView];
     }
     
-    [self stopDisplayLink];
+    // [self pauseTimer];
     if(_settings.sendDummyEvent){
-        [self setupDisplayLink];
-        [self startDisplayLink];
+        if(!safeTimer) [self setupTimer];
+        if(!viewJustLoaded) [safeTimer start];
     }
+    else [safeTimer pause];
     
     _motionHandler = [MotionHandler sharedWithProfile: nil];
     _motionHandler.gyroBiasX = _settings.gyroBiasX.doubleValue;
@@ -461,12 +462,11 @@
 }
 
 - (void)viewWillAppear:(BOOL)animated {
-    if(_settings.sendDummyEvent) [self startDisplayLink];
+    // if(_settings.sendDummyEvent) [self startTimer];
 }
 
 - (void)viewWillDisappear:(BOOL)animated {
     [super viewWillDisappear:animated];
-    [self stopDisplayLink];
 }
 
 - (void)viewDidAppear:(BOOL)animated
@@ -541,7 +541,8 @@
                                              selector:@selector(keyboardWillHide)
                                                  name:UIKeyboardWillHideNotification
                                                object:nil];
-
+    
+    [safeTimer start];
     #endif
 }
 
@@ -841,6 +842,9 @@
         for(UIView* view in self.view.subviews){
             [view removeFromSuperview];
         }
+        
+        [safeTimer pause];
+        [safeTimer clean];
     }
 }
 
@@ -1698,36 +1702,17 @@
 }
 
 - (void)dealloc {
-    [self stopDisplayLink];
     NSLog(@"dealloc StreamFrameViewController %f", CACurrentMediaTime());
 }
 
-- (void)setupDisplayLink {
-    if (_displayLink != nil) return;
+- (void)setupTimer {
     TemporarySettings* tempSettings = [[[DataManager alloc] init] getSettings];  //StreamFrameViewController retrieve the settings here.
-    if (@available(iOS 15.0, tvOS 15.0, *)) {
-        [_displayLink setPreferredFrameRateRange:CAFrameRateRangeMake(tempSettings.framerate.intValue,tempSettings.framerate.intValue, tempSettings.framerate.intValue)];
-    }
-    else {
-        _displayLink.preferredFramesPerSecond = tempSettings.framerate.intValue;
-    }
-    _displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(displayLinkTick:)];
-    [_displayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];
-}
-
-- (void)startDisplayLink {
-    _displayLink.paused = NO;
-}
-
-- (void)stopDisplayLink {
-    [_displayLink invalidate];
-    _displayLink = nil;
-}
-
-- (void)displayLinkTick:(CADisplayLink *)link {
-    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
-        LiSendKeyboardEvent(0xFF, KEY_ACTION_UP, 0);
-    });
+    safeTimer = [[SafeTimer alloc] initWithInterval:1.0/tempSettings.framerate.intValue delay:0 queueLabel:@"streamview.timer" handler:^{
+        dispatch_async(dispatch_get_global_queue(QOS_CLASS_USER_INTERACTIVE, 0), ^{
+            LiSendKeyboardEvent(0xFF, KEY_ACTION_UP, 0);
+            // LiSendTouchEvent(LI_TOUCH_EVENT_UP, 200, 1, 1, 0, 0, 0, 0);
+        });
+    }];
 }
 
 @end