Added ErrorTextField

Sources/iOS/ErrorTextField.swift

+/*
+ * Copyright (C) 2015 - 2016, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.io>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *	*	Redistributions of source code must retain the above copyright notice, this
+ *		list of conditions and the following disclaimer.
+ *
+ *	*	Redistributions in binary form must reproduce the above copyright notice,
+ *		this list of conditions and the following disclaimer in the documentation
+ *		and/or other materials provided with the distribution.
+ *
+ *	*	Neither the name of Material nor the names of its
+ *		contributors may be used to endorse or promote products derived from
+ *		this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+import UIKit
+
+public class ErrorTextField: TextField {
+ 
+  /// Controls the visibility of detailLabel
+ @IBInspectable public var revealError: Bool = false {
+  didSet {
+   detailLabel.hidden = !revealError
+  }
+ }
+ 
+ /**
+  Prepares the view instance when intialized. When subclassing,
+  it is recommended to override the prepareView method
+  to initialize property values and other setup operations.
+  The super.prepareView method should always be called immediately
+  when subclassing.
+  */
+ override public func prepareView() {
+  
+  super.prepareView()
+  detailLabel.hidden = true
+  detailColor = MaterialColor.red.base
+  
+ }
+
+}