diff --git a/EFCountingLabel/Classes/EFCount.swift b/EFCountingLabel/Classes/EFCount.swift
index 3e3e166..dbb9f3b 100644
--- a/EFCountingLabel/Classes/EFCount.swift
+++ b/EFCountingLabel/Classes/EFCount.swift
@@ -17,6 +17,7 @@
 //  THE SOFTWARE.
 
 import Foundation
+import QuartzCore
 
 public protocol EFTiming {
     func update(_ time: CGFloat) -> CGFloat
diff --git a/EFCountingLabel/Classes/EFCountAdapter.swift b/EFCountingLabel/Classes/EFCountAdapter.swift
index 56417cf..e7b416f 100644
--- a/EFCountingLabel/Classes/EFCountAdapter.swift
+++ b/EFCountingLabel/Classes/EFCountAdapter.swift
@@ -59,6 +59,46 @@ extension EFCountAdapter {
 
 open class EFCountingButton: UIButton, EFCountAdapter {
     public private(set) var counter = EFCounter()
+    
+    open var formatBlock: ((CGFloat) -> String)? {
+        set {
+            if let formatBlock = newValue {
+                setUpdateBlock { value, button in button.setTitle(formatBlock(value), for: .normal) }
+            } else {
+                setUpdateBlock(nil)
+            }
+        }
+        @available(*, unavailable)
+        get {
+            return nil
+        }
+    }
+    open var attributedFormatBlock: ((CGFloat) -> NSAttributedString)? {
+        set {
+            if let attributedFormatBlock = newValue {
+                setUpdateBlock { value, button in button.setAttributedTitle(attributedFormatBlock(value), for: .normal) }
+            } else {
+                setUpdateBlock(nil)
+            }
+        }
+        @available(*, unavailable)
+        get {
+            return nil
+        }
+    }
+    open var completionBlock: (() -> Void)? {
+        set {
+            if let completionBlock = newValue {
+                setCompletionBlock { _ in completionBlock() }
+            } else {
+                setCompletionBlock(nil)
+            }
+        }
+        @available(*, unavailable)
+        get {
+            return nil
+        }
+    }
 
     deinit {
         counter.invalidate()
@@ -68,6 +108,46 @@ open class EFCountingButton: UIButton, EFCountAdapter {
 open class EFCountingLabel: UILabel, EFCountAdapter {
     public private(set) var counter = EFCounter()
 
+    open var formatBlock: ((CGFloat) -> String)? {
+        set {
+            if let formatBlock = newValue {
+                setUpdateBlock { value, label in label.text = formatBlock(value) }
+            } else {
+                setUpdateBlock(nil)
+            }
+        }
+        @available(*, unavailable)
+        get {
+            return nil
+        }
+    }
+    open var attributedFormatBlock: ((CGFloat) -> NSAttributedString)? {
+        set {
+            if let attributedFormatBlock = newValue {
+                setUpdateBlock { value, label in label.attributedText = attributedFormatBlock(value) }
+            } else {
+                setUpdateBlock(nil)
+            }
+        }
+        @available(*, unavailable)
+        get {
+            return nil
+        }
+    }
+    open var completionBlock: (() -> Void)? {
+        set {
+            if let completionBlock = newValue {
+                setCompletionBlock { _ in completionBlock() }
+            } else {
+                setCompletionBlock(nil)
+            }
+        }
+        @available(*, unavailable)
+        get {
+            return nil
+        }
+    }
+
     deinit {
         counter.invalidate()
     }
diff --git a/Example/Podfile.lock b/Example/Podfile.lock
index 50e94a9..4869f88 100644
--- a/Example/Podfile.lock
+++ b/Example/Podfile.lock
@@ -13,4 +13,4 @@ SPEC CHECKSUMS:
 
 PODFILE CHECKSUM: 18006cf8308f1ddc4db21317a6cf556416d587b1
 
-COCOAPODS: 1.7.0.rc.1
+COCOAPODS: 1.7.0
diff --git a/Example/Pods/Manifest.lock b/Example/Pods/Manifest.lock
index 50e94a9..4869f88 100644
--- a/Example/Pods/Manifest.lock
+++ b/Example/Pods/Manifest.lock
@@ -13,4 +13,4 @@ SPEC CHECKSUMS:
 
 PODFILE CHECKSUM: 18006cf8308f1ddc4db21317a6cf556416d587b1
 
-COCOAPODS: 1.7.0.rc.1
+COCOAPODS: 1.7.0
diff --git a/Example/Pods/Target Support Files/Pods-EFCountingLabel_Example/Pods-EFCountingLabel_Example-frameworks.sh b/Example/Pods/Target Support Files/Pods-EFCountingLabel_Example/Pods-EFCountingLabel_Example-frameworks.sh
index 777ef1a..b878448 100755
--- a/Example/Pods/Target Support Files/Pods-EFCountingLabel_Example/Pods-EFCountingLabel_Example-frameworks.sh	
+++ b/Example/Pods/Target Support Files/Pods-EFCountingLabel_Example/Pods-EFCountingLabel_Example-frameworks.sh	
@@ -94,7 +94,7 @@ install_dsym() {
     binary="${DERIVED_FILES_DIR}/${basename}.framework.dSYM/Contents/Resources/DWARF/${basename}"
 
     # Strip invalid architectures so "fat" simulator / device frameworks work on device
-    if [[ "$(file "$binary")" == *"Mach-O dSYM companion"* ]]; then
+    if [[ "$(file "$binary")" == *"Mach-O "*"dSYM companion"* ]]; then
       strip_invalid_archs "$binary"
     fi