优化扫码动画效果

galaxy/galaxy/Classes/Tools/SwiftScan/LBXScanLineAnimation.swift

@@ -25,7 +25,6 @@ class LBXScanLineAnimation: UIImageView {
         if image != nil {
             stepAnimation()
         }
-        
     }
     
     @objc func stepAnimation() {
@@ -35,37 +34,69 @@ class LBXScanLineAnimation: UIImageView {
         
         guard let image = self.image else { return }
         
+        // 重要：取消之前可能存在的延迟调用
+        NSObject.cancelPreviousPerformRequests(withTarget: self,
+                                               selector: #selector(LBXScanLineAnimation.stepAnimation),
+                                               object: nil)
+        
         var frame: CGRect = animationRect
         
         let hImg = image.size.height * animationRect.size.width / image.size.width
         
-        frame.origin.y -= hImg
+        // 重置到起始位置
+        frame.origin.y = animationRect.origin.y
         frame.size.height = hImg
         self.frame = frame
         self.alpha = 0.0
         
-        UIView.animate(withDuration: 1.4, animations: { () in
+        UIView.animate(withDuration: 1.4, animations: { [weak self] () in
+            guard let self = self else { return }
             
             self.alpha = 1.0
             
             var frame = self.animationRect
             let hImg = image.size.height * self.animationRect.size.width / image.size.width
             
-            frame.origin.y += (frame.size.height -  hImg)
+            frame.origin.y = self.animationRect.origin.y + (self.animationRect.size.height - hImg)
             frame.size.height = hImg
             
             self.frame = frame
             
-            }, completion: { (_: Bool) in
+        }, completion: { [weak self] (_: Bool) in
+            guard let self = self else { return }
             
-                self.perform(#selector(LBXScanLineAnimation.stepAnimation), with: nil, afterDelay: 0.3)
+            // 检查动画是否应该继续
+            if self.isAnimationing {
+                self.perform(#selector(LBXScanLineAnimation.stepAnimation),
+                           with: nil,
+                           afterDelay: 0.3)
+            }
         })
-        
     }
     
     func stopStepAnimating() {
-        self.isHidden = true
+        // 先设置标记为false，阻止新的动画开始
         isAnimationing = false
+        
+        // 取消所有延迟调用
+        NSObject.cancelPreviousPerformRequests(withTarget: self)
+        
+        // 停止当前的动画
+        self.layer.removeAllAnimations()
+        
+        // 隐藏视图
+        self.isHidden = true
+        
+        // 重置frame到初始位置
+        if !animationRect.isEmpty {
+            var frame = animationRect
+            if let image = self.image {
+                let hImg = image.size.height * animationRect.size.width / image.size.width
+                frame.origin.y = animationRect.origin.y
+                frame.size.height = hImg
+            }
+            self.frame = frame
+        }
     }
     
     static public func instance() -> LBXScanLineAnimation {
@@ -73,7 +104,7 @@ class LBXScanLineAnimation: UIImageView {
     }
     
     deinit {
+        NSObject.cancelPreviousPerformRequests(withTarget: self)
         stopStepAnimating()
     }
-
 }

galaxy/galaxy/Classes/Tools/SwiftScan/LBXScanNetAnimation.swift

@@ -38,39 +38,74 @@ class LBXScanNetAnimation: UIImageView {
         
         guard let image = self.image else { return }
         
+        // 重要：取消之前可能存在的延迟调用
+        NSObject.cancelPreviousPerformRequests(withTarget: self,
+                                               selector: #selector(LBXScanNetAnimation.stepAnimation),
+                                               object: nil)
+        
         var frame = animationRect
         
         let hImg = image.size.height * animationRect.size.width / image.size.width
         
-        frame.origin.y -= hImg
+        // 重置到起始位置
+        frame.origin.y = animationRect.origin.y
         frame.size.height = hImg
         self.frame = frame
         
         self.alpha = 0.0
         
-        UIView.animate(withDuration: 1.2, animations: { () in
+        UIView.animate(withDuration: 1.2, animations: { [weak self] () in
+            guard let self = self else { return }
             
             self.alpha = 1.0
             
             var frame = self.animationRect
             let hImg = image.size.height * self.animationRect.size.width / image.size.width
             
-            frame.origin.y += (frame.size.height -  hImg)
+            frame.origin.y = self.animationRect.origin.y + (self.animationRect.size.height - hImg)
             frame.size.height = hImg
             
             self.frame = frame
             
-            }, completion: { (_: Bool) in
-                
-                self.perform(#selector(LBXScanNetAnimation.stepAnimation), with: nil, afterDelay: 0.3)
+        }, completion: { [weak self] (_: Bool) in
+            guard let self = self else { return }
             
+            // 检查动画是否应该继续
+            if self.isAnimationing {
+                self.perform(#selector(LBXScanNetAnimation.stepAnimation),
+                           with: nil,
+                           afterDelay: 0.3)
+            }
         })
-        
     }
     
     func stopStepAnimating() {
-        self.isHidden = true
+        // 先设置标记为false，阻止新的动画开始
         isAnimationing = false
+        
+        // 取消所有延迟调用
+        NSObject.cancelPreviousPerformRequests(withTarget: self)
+        
+        // 停止当前的动画
+        self.layer.removeAllAnimations()
+        
+        // 隐藏视图
+        self.isHidden = true
+        
+        // 重置frame到初始位置
+        if !animationRect.isEmpty {
+            var frame = animationRect
+            if let image = self.image {
+                let hImg = image.size.height * animationRect.size.width / image.size.width
+                frame.origin.y = animationRect.origin.y
+                frame.size.height = hImg
+            }
+            self.frame = frame
+        }
     }
     
+    deinit {
+        NSObject.cancelPreviousPerformRequests(withTarget: self)
+        stopStepAnimating()
+    }
 }

galaxy/galaxy/Classes/Tools/SwiftScan/LBXScanViewController.swift

@@ -81,6 +81,12 @@ class LBXScanViewController: YHBaseViewController, UIImagePickerControllerDelega
         }
     }
     
+    override open func viewWillDisappear(_ animated: Bool) {
+        super.viewWillDisappear(animated)
+        NSObject.cancelPreviousPerformRequests(withTarget: self)
+        stopScan()
+    }
+
     @objc open func startScan() {
         if scanObj == nil {
             var cropRect = CGRect.zero
@@ -161,11 +167,6 @@ class LBXScanViewController: YHBaseViewController, UIImagePickerControllerDelega
         }
     }
 
-    override open func viewWillDisappear(_ animated: Bool) {
-        NSObject.cancelPreviousPerformRequests(withTarget: self)
-        stopScan()
-    }
-
     open func openPhotoAlbum() {
         LBXPermissions.authorizePhotoWith { [weak self] granted in
             if granted {