perfGraph tips

VoidLink/Localization/Localizable.xcstrings

@@ -5278,6 +5278,29 @@
         }
       }
     },
+    "This is an experimental feature that may cause stuttering or freezing in the stream view." : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "这是一项实验性功能，可能导致画面卡顿。"
+          }
+        },
+        "zh-Hant" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "這是一項實驗性功能，可能導致畫面卡頓。"
+          }
+        },
+        "zh-HK" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "這是一項實驗性功能，可能導致畫面卡頓。"
+          }
+        }
+      }
+    },
     "Tips" : {
       "extractionState" : "manual",
       "localizations" : {

VoidLink/ViewControllers/SettingsViewController.m

@@ -2377,6 +2377,14 @@ BOOL isCustomResolution(int resolutionSelected) {
 - (void) enableGraphsChanged:(UISwitch* )sender {
     [self.graphOpacityStepper setEnabled:sender.isOn];
     [self findDynamicLabelFromStack:self.graphOpacityStack].hidden = !sender.isOn;
+    UIAlertController *alertController = [UIAlertController alertControllerWithTitle: [LocalizationHelper localizedStringForKey:@"Tips"] message: [LocalizationHelper localizedStringForKey:@"This is an experimental feature that may cause stuttering or freezing in the stream view."] preferredStyle:UIAlertControllerStyleAlert];
+    
+    UIAlertAction *okAction = [UIAlertAction actionWithTitle:[LocalizationHelper localizedStringForKey:@"OK"]
+                                                           style:UIAlertActionStyleDefault
+                                                     handler:nil];
+    [alertController addAction:okAction];
+    
+    if(sender.isOn && !settingsViewJustLoaded) [self presentViewController:alertController animated:YES completion:nil];
 }
 
 - (void) graphOpacityStepperTapped:(UIStepper* )sender {