Index: src/wp-admin/js/editor.js
===================================================================
--- src/wp-admin/js/editor.js	(revision 28576)
+++ src/wp-admin/js/editor.js	(working copy)
@@ -60,7 +60,7 @@
 			if ( ed ) {
 				ed.show();
 
-				if ( editorHeight ) {
+				if ( ! tinymce.Env.iOS && editorHeight ) {
 					toolbarHeight = getToolbarHeight();
 					editorHeight = editorHeight - toolbarHeight + 14;
 
@@ -84,16 +84,18 @@
 			}
 
 			if ( ed ) {
-				iframe = DOM.get( id + '_ifr' );
-				editorHeight = iframe ? parseInt( iframe.style.height, 10 ) : 0;
+				if ( ! tinymce.Env.iOS ) {
+					iframe = DOM.get( id + '_ifr' );
+					editorHeight = iframe ? parseInt( iframe.style.height, 10 ) : 0;
 
-				if ( editorHeight ) {
-					toolbarHeight = getToolbarHeight();
-					editorHeight = editorHeight + toolbarHeight - 14;
+					if ( editorHeight ) {
+						toolbarHeight = getToolbarHeight();
+						editorHeight = editorHeight + toolbarHeight - 14;
 
-					// height cannot be under 50 or over 5000
-					if ( editorHeight > 50 && editorHeight < 5000 ) {
-						txtarea_el.style.height = editorHeight + 'px';
+						// height cannot be under 50 or over 5000
+						if ( editorHeight > 50 && editorHeight < 5000 ) {
+							txtarea_el.style.height = editorHeight + 'px';
+						}
 					}
 				}
 
Index: src/wp-includes/js/tinymce/plugins/wordpress/plugin.js
===================================================================
--- src/wp-includes/js/tinymce/plugins/wordpress/plugin.js	(revision 28576)
+++ src/wp-includes/js/tinymce/plugins/wordpress/plugin.js	(working copy)
@@ -292,6 +292,10 @@
 			}
 		}
 
+		if ( tinymce.Env.iOS ) {
+			bodyClass.push('ios');
+		}
+
 		bodyClass.push('wp-editor');
 
 		tinymce.each( bodyClass, function( cls ) {
@@ -358,6 +362,10 @@
 	editor.on( 'preInit', function() {
 		// Don't replace <i> with <em> and <b> with <strong> and don't remove them when empty
 		editor.schema.addValidElements( '@[id|accesskey|class|dir|lang|style|tabindex|title|contenteditable|draggable|dropzone|hidden|spellcheck|translate],i,b' );
+
+		if ( tinymce.Env.iOS ) {
+			editor.settings.height = 300;
+		}
 	});
 
 	// Add custom shortcuts
Index: src/wp-includes/js/tinymce/skins/wordpress/wp-content.css
===================================================================
--- src/wp-includes/js/tinymce/skins/wordpress/wp-content.css	(revision 28576)
+++ src/wp-includes/js/tinymce/skins/wordpress/wp-content.css	(working copy)
@@ -1,4 +1,14 @@
 /* Additional default styles for the editor */
+
+html {
+	height: 100%;
+}
+
+body#tinymce.ios {
+	height: 200%;
+	max-width: none;
+}
+
 body {
 	font-family: Georgia, "Times New Roman", "Bitstream Charter", Times, serif;
 	font-size: 13px;