Import latest LNPopupController master branch with iOS 12 fixes

LNPopupControllerExample_iOS12/LNPopupControllerExample/SplitViewController.m

@@ -0,0 +1,57 @@
+//
+//  SplitViewController.m
+//  LNPopupControllerExample
+//
+//  Created by Leo Natan on 8/21/19.
+//  Copyright © 2019 Leo Natan. All rights reserved.
+//
+
+#import "SplitViewController.h"
+
+@implementation UIViewController (LNSplitViewController)
+
+- (LNSplitViewController *)ln_splitViewController
+{
+	return (id)self.splitViewController;
+}
+
+@end
+
+@implementation LNSplitViewController
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+    
+	if(@available(iOS 14.0, *))
+	{
+		self.minimumPrimaryColumnWidth = 400;
+		self.maximumPrimaryColumnWidth = 400;
+		
+		if(self.style == UISplitViewControllerStyleTripleColumn)
+		{
+			self.minimumSupplementaryColumnWidth = 400;
+			self.maximumSupplementaryColumnWidth = 400;
+		}
+	}
+	else
+	{
+		self.preferredDisplayMode = UISplitViewControllerDisplayModeOneBesideSecondary;
+	}
+}
+
+- (nullable __kindof UIViewController *)viewControllerForColumn:(LNSplitViewControllerColumn)column
+{
+	if(@available(iOS 14.0, *))
+	{
+		return [super viewControllerForColumn:(NSInteger)column];
+	}
+	
+	return column == LNSplitViewControllerColumnSecondary ? self.viewControllers.lastObject : self.viewControllers.firstObject;
+}
+
+@end
+
+@implementation SplitViewControllerPrimaryPopup @end
+@implementation SplitViewControllerSecondaryPopup @end
+@implementation SplitViewControllerGlobalPopup @end