Best Performances

Author: PierrePerrin

PPMusicImageShadow/PPMusicImageShadow/PPMusicImageShadow.swift

@@ -17,7 +17,7 @@ class PPMusicImageShadow: UIView {
 
             self.imageView?.contentMode = newValue
             self.blurredImageView?.contentMode = newValue
-
+            
         }get{
             return super.contentMode
         }
@@ -46,7 +46,7 @@ class PPMusicImageShadow: UIView {
             imageWidth = self.frame.size.width;
             imageHeight = self.frame.size.height;
         }
-    
+        
         return CGSize(width: imageWidth, height: imageHeight)
     }
 
@@ -74,11 +74,14 @@ class PPMusicImageShadow: UIView {
 
     var imageView : UIImageView!
     var blurredImageView : UIImageView!
+    var blurWork : DispatchWorkItem?
 
     func calculateBlurredImage(){
+        
+        
         #if !TARGET_INTERFACE_BUILDER
-            
-            DispatchQueue.global(qos: DispatchQoS.QoSClass.userInteractive).async {
+            blurWork?.cancel()
+            blurWork = DispatchWorkItem(qos: DispatchQoS.userInteractive, flags: DispatchWorkItemFlags.noQoS) {
 
                 if let imageToblur = self.image{
 
@@ -101,25 +104,16 @@ class PPMusicImageShadow: UIView {
                     }
 
                     guard
-                    let resizedImage = containerImage.resized(withPercentage: self.resizeConstant),
-                    let ciimage = CIImage.init(image:resizedImage),
+                        let resizedImage = containerImage.resized(withPercentage: self.resizeConstant),
+                        let ciimage = CIImage.init(image:resizedImage),
                         let blurredImage = self.applyBlur(ciimage: ciimage) else {return}
 
-                    let data1 = UIImageJPEGRepresentation(resizedImage, 1.0)
-                    let dir1 = NSHomeDirectory().appending("/Hellcont.jpg")
-                    try? data1?.write(to: URL.init(fileURLWithPath: dir1))
-                    print("dir : \(dir1)")
-                    let data = UIImageJPEGRepresentation(blurredImage, 1.0)
-                    let dir = NSHomeDirectory().appending("/Hello.jpg")
-                    try? data?.write(to: URL.init(fileURLWithPath: dir))
-                    print("dir : \(dir)")
-                    
                     DispatchQueue.main.async {
                         self.blurredImageView?.image = blurredImage
                     }
                 }
             }
-            
+            blurWork?.perform()
 
         #else
             self.blurredImageView?.image = self.image
@@ -185,9 +179,8 @@ class PPMusicImageShadow: UIView {
     override func layoutSubviews() {
         super.layoutSubviews()
 
-        self.calculateBlurredImage()
         imageView?.frame = self.bounds
-
+        
         self.blurredImageView?.frame = self.bounds
         self.blurredImageView?.frame.size = getNewImageSize().scaled(by: shadowSizeConstant)
 
@@ -202,7 +195,6 @@ class PPMusicImageShadow: UIView {
         mask.frame =  self.blurredImageView!.bounds
         //self.blurredImageView?.layer.mask = mask
         self.blurredImageView?.layer.masksToBounds = false
-        
     }
 
     override init(frame: CGRect) {
@@ -232,10 +224,10 @@ class PPMusicImageShadow: UIView {
 
         imageView = UIImageView()
         blurredImageView = UIImageView()
-        self.calculateBlurredImage()
         self.addSubview(blurredImageView!)
         self.addSubview(imageView!)
         self.imageView?.contentMode = self.contentMode
         self.blurredImageView?.contentMode = self.contentMode
+        self.calculateBlurredImage()
     }
 }

PPMusicImageShadow/PPMusicImageShadowExample/Base.lproj/Main.storyboard

@@ -31,6 +31,9 @@
                                 </constraints>
                                 <userDefinedRuntimeAttributes>
                                     <userDefinedRuntimeAttribute type="image" keyPath="image" value="italy-2080072_640.jpg"/>
+                                    <userDefinedRuntimeAttribute type="number" keyPath="blurRadius">
+                                        <real key="value" value="3"/>
+                                    </userDefinedRuntimeAttribute>
                                 </userDefinedRuntimeAttributes>
                             </view>
                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="T17-Ox-kpO">

PPMusicImageShadow/PPMusicImageShadowExample/ViewController.swift

@@ -18,7 +18,7 @@ class ViewController: UIViewController {
 
     @IBAction func slider1(_ sender: UISlider) {
 
-        imageView.blurRadius = CGFloat(sender.value * 8)
+        imageView.blurRadius = CGFloat(sender.value * 3)
     }
 
     @IBAction func slider2(_ sender: UISlider) {
@@ -29,6 +29,10 @@ class ViewController: UIViewController {
         super.didReceiveMemoryWarning()
         // Dispose of any resources that can be recreated.
     }
+    
+    override func viewDidLayoutSubviews() {
+        super.viewDidLayoutSubviews()
+    }
 
 
 }