Move clearing out of ASTextKitComponents property delegates into ASTextKitComponents dealloc (#591)

Source/TextKit/ASTextKitComponents.mm

@@ -1,5 +1,5 @@
 //
-//  ASTextKitComponents.m
+//  ASTextKitComponents.mm
 //  Texture
 //
 //  Copyright (c) 2014-present, Facebook, Inc.  All rights reserved.
@@ -30,6 +30,8 @@
 
 @implementation ASTextKitComponents
 
+#pragma mark - Class
+
 + (instancetype)componentsWithAttributedSeedString:(NSAttributedString *)attributedSeedString
                                  textContainerSize:(CGSize)textContainerSize
 {
@@ -58,6 +60,17 @@
   return components;
 }
 
+#pragma mark - Lifecycle
+
+- (void)dealloc
+{
+  // Nil out all delegate to prevent crash
+  _textView.delegate = nil;
+  _layoutManager.delegate = nil;
+}
+
+#pragma mark - Sizing
+
 - (CGSize)sizeForConstrainedWidth:(CGFloat)constrainedWidth
 {
   ASTextKitComponents *components = self;