fix

iOSClient/AppDelegate.m

@@ -895,19 +895,25 @@
     [buttonPlus setTranslatesAutoresizingMaskIntoConstraints:NO];
     [tabBarController.tabBar addSubview:buttonPlus];
     
-    constraint =[NSLayoutConstraint constraintWithItem:buttonPlus attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:tabBarController.tabBar attribute:NSLayoutAttributeCenterX multiplier:1.0 constant:0];
+    multiplier = 1.0;
+    // X
+    constraint =[NSLayoutConstraint constraintWithItem:buttonPlus attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:tabBarController.tabBar attribute:NSLayoutAttributeCenterX multiplier:multiplier constant:0];
     [tabBarController.view addConstraint:constraint];
-    
-    multiplier = 1 * (tabBarController.tabBar.frame.size.height - safeAreaBottom) / tabBarController.tabBar.frame.size.height;
-    constraint =[NSLayoutConstraint constraintWithItem:buttonPlus attribute:NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:tabBarController.tabBar attribute:NSLayoutAttributeCenterY multiplier:multiplier constant:0];
+    // Y
+    if (safeAreaBottom == 0) {
+        constraint = [NSLayoutConstraint constraintWithItem:buttonPlus attribute:NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:tabBarController.tabBar attribute:NSLayoutAttributeCenterY multiplier:multiplier constant:0];
+    } else {
+        constraint = [NSLayoutConstraint constraintWithItem:buttonPlus attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:tabBarController.tabBar attribute:NSLayoutAttributeCenterY multiplier:1.0 constant:+5];
+    }
     [tabBarController.view addConstraint:constraint];
     
-    multiplier = 0.8 * (tabBarController.tabBar.frame.size.height - safeAreaBottom) / tabBarController.tabBar.frame.size.height;
     
-    constraint =[NSLayoutConstraint constraintWithItem:buttonPlus attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:tabBarController.tabBar attribute:NSLayoutAttributeHeight multiplier:multiplier constant:0];
+    multiplier = 0.8 * (tabBarController.tabBar.frame.size.height - safeAreaBottom) / tabBarController.tabBar.frame.size.height;
+    // Width
+    constraint = [NSLayoutConstraint constraintWithItem:buttonPlus attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:tabBarController.tabBar attribute:NSLayoutAttributeHeight multiplier:multiplier constant:0];
     [tabBarController.view addConstraint:constraint];
-    
-    constraint =[NSLayoutConstraint constraintWithItem:buttonPlus attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:tabBarController.tabBar attribute:NSLayoutAttributeHeight multiplier:multiplier constant:0];
+    // Height
+    constraint = [NSLayoutConstraint constraintWithItem:buttonPlus attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:tabBarController.tabBar attribute:NSLayoutAttributeHeight multiplier:multiplier constant:0];
     [tabBarController.view addConstraint:constraint];
 }