Added support for tvOS. Updated podspec file for tvOS. Eliminated class KeyboardLayoutConstraint on tvOS. Eliminated class LoadingView on tvOS.

Author: larryaasen

Spring.podspec

@@ -8,6 +8,8 @@ Pod::Spec.new do |s|
   s.source = { :git => 'https://github.com/MengTo/Spring.git', :tag => s.version.to_s }
   s.requires_arc = true
   s.ios.deployment_target = '8.0'
+  s.tvos.deployment_target = '11.0'
   s.source_files = 'Spring/*.swift'
-  s.resources = ['Spring/*.xib', 'SpringApp/*.xcassets']
+  s.ios.resources = ['Spring/*.xib', 'SpringApp/*.xcassets']
+  s.tvos.resources = ['SpringApp/*.xcassets']
 end

Spring/KeyboardLayoutConstraint.swift

@@ -22,11 +22,14 @@
 
 import UIKit
 
+#if !os(tvOS)
+@available(tvOS, unavailable)
 public class KeyboardLayoutConstraint: NSLayoutConstraint {
 
     private var offset : CGFloat = 0
     private var keyboardVisibleHeight : CGFloat = 0
 
+    @available(tvOS, unavailable)
     override public func awakeFromNib() {
         super.awakeFromNib()
 
@@ -104,3 +107,4 @@ public class KeyboardLayoutConstraint: NSLayoutConstraint {
     }
 
 }
+#endif

Spring/LoadingView.swift

@@ -22,6 +22,8 @@
 
 import UIKit
 
+#if !os(tvOS)
+@available(tvOS, unavailable)
 public class LoadingView: UIView {
 
     @IBOutlet public weak var indicatorView: SpringView!
@@ -81,3 +83,4 @@ public extension UIView {
     }
 
 }
+#endif