Specify Swift 4 in the podspec

Author: bcylin

.swift-version

@@ -1 +1 @@
-4.0
+4.1

.travis.yml

@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode9
+osx_image: xcode9.3beta
 cache:
   bundler: true
   directories:
@@ -8,7 +8,7 @@ cache:
 before_install:
   - export LANG=en_US.UTF-8
   - xcrun instruments -s devices
-  - xcrun instruments -w "iPhone 8 (11.0) [" || true
+  - open -b com.apple.iphonesimulator
 install:
   - make install
 before_script:

ICInputAccessory.podspec

@@ -19,6 +19,7 @@ Pod::Spec.new do |s|
   s.license       = { type: "MIT", file: "LICENSE" }
   s.authors       = "bcylin", "trisix"
   s.platform      = :ios, "8.0"
+  s.swift_version = "4.0"
   s.source        = { git: "https://github.com/polydice/ICInputAccessory.git", tag: "v#{s.version}" }
   s.requires_arc  = true
 

Source/TokenField/ICTokenField.swift

@@ -300,7 +300,7 @@ open class ICTokenField: UIView, UITextFieldDelegate, ICBackspaceTextFieldDelega
         continue
       }
 
-      let index = text.index(text.endIndex, offsetBy: -delimiter.characters.count)
+      let index = text.index(text.endIndex, offsetBy: -delimiter.count)
       let newText = String(text[..<index])
 
       if !newText.isEmpty && newText != delimiter && (delegate?.tokenField?(self, shouldCompleteText: newText) ?? true) {