Fix content insets.

SignalMessaging/ViewControllers/OWSTableViewController.m

@@ -453,10 +453,21 @@ NSString *const kOWSTableCellIdentifier = @"kOWSTableCellIdentifier";
     self.tableView.dataSource = self;
     self.tableView.tableFooterView = [[UIView alloc] initWithFrame:CGRectZero];
 
-    [self.tableView applyScrollViewInsetsFix];
-
     [self.view addSubview:self.tableView];
-    [self.tableView autoPinEdgesToSuperviewEdges];
+
+    if ([self.tableView applyScrollViewInsetsFix]) {
+        // if applyScrollViewInsetsFix disables contentInsetAdjustmentBehavior,
+        // we need to pin to the top and bottom layout guides since UIKit
+        // won't adjust our content insets.
+        [self.tableView autoPinToTopLayoutGuideOfViewController:self withInset:0];
+        [self.tableView autoPinToBottomLayoutGuideOfViewController:self withInset:0];
+        [self.tableView autoPinWidthToSuperview];
+
+        // We don't need a top or bottom insets, since we pin to the top and bottom layout guides.
+        self.automaticallyAdjustsScrollViewInsets = NO;
+    } else {
+        [self.tableView autoPinEdgesToSuperviewEdges];
+    }
 
     [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:kOWSTableCellIdentifier];
 

SignalMessaging/categories/UIView+OWS.h

@@ -134,7 +134,8 @@ CGFloat ScaleFromIPhone5(CGFloat iPhone5Value);
 
 @interface UIScrollView (OWS)
 
-- (void)applyScrollViewInsetsFix;
+// Returns YES if contentInsetAdjustmentBehavior is disabled.
+- (BOOL)applyScrollViewInsetsFix;
 
 @end
 

SignalMessaging/categories/UIView+OWS.m

@@ -519,7 +519,7 @@ CGFloat ScaleFromIPhone5(CGFloat iPhone5Value)
 
 @implementation UIScrollView (OWS)
 
-- (void)applyScrollViewInsetsFix
+- (BOOL)applyScrollViewInsetsFix
 {
     // Fix a bug that only affects iOS 11.0.x and 11.1.x.
     // The symptom is a fix weird animation that happens when using the interactive pop gesture.
@@ -528,7 +528,9 @@ CGFloat ScaleFromIPhone5(CGFloat iPhone5Value)
 #pragma clang diagnostic ignored "-Wpartial-availability"
         self.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
 #pragma clang diagnostic pop
+        return YES;
     }
+    return NO;
 }
 
 @end