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TUIKit/TUICallKit/TUICallKit-Swift/View/Component/UserInfoView/Single/BackgroundView.swift

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+//
+//  AvatarBackgroundView.swift
+//  TUICallKit
+//
+//  Created by noah on 2023/11/2.
+//
+
+import Foundation
+
+class BackgroundView: UIView {
+    
+    let remoteUserListObserver = Observer()
+    
+    let userHeadImageView: UIImageView = {
+        let userHeadImageView = UIImageView(frame: CGRect.zero)
+        userHeadImageView.contentMode = .scaleAspectFill
+        if let image = TUICallKitCommon.getBundleImage(name: "default_user_icon") {
+            userHeadImageView.image = image
+        }
+        return userHeadImageView
+    }()
+    
+    let blurEffectView: UIVisualEffectView = {
+        let blurEffect = UIBlurEffect(style: .light)
+        let blurEffectView = UIVisualEffectView(effect: blurEffect)
+        blurEffectView.alpha = 0.65
+        return blurEffectView
+    }()
+    
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+        setUserImage()
+        registerObserveState()
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    deinit {
+        TUICallState.instance.remoteUserList.removeObserver(remoteUserListObserver)
+    }
+    
+    // MARK: UI Specification Processing
+    private var isViewReady: Bool = false
+    override func didMoveToWindow() {
+        super.didMoveToWindow()
+        if isViewReady { return }
+        constructViewHierarchy()
+        activateConstraints()
+        isViewReady = true
+    }
+    
+    func constructViewHierarchy() {
+        addSubview(userHeadImageView)
+        addSubview(blurEffectView)
+    }
+    
+    func activateConstraints() {
+        self.userHeadImageView.snp.makeConstraints { make in
+            make.edges.equalTo(self)
+        }
+        self.blurEffectView.snp.makeConstraints { make in
+            make.edges.equalTo(self)
+        }
+    }
+    
+    // MARK: Register TUICallState Observer && Update UI
+    func registerObserveState() {
+        remoteUserListChanged()
+    }
+    
+    func remoteUserListChanged() {
+        TUICallState.instance.remoteUserList.addObserver(remoteUserListObserver, closure: { [weak self] newValue, _ in
+            guard let self = self else { return }
+            self.setUserImage()
+        })
+    }
+    
+    // MARK: Update UI
+    func setUserImage() {
+        let remoteUser = TUICallState.instance.remoteUserList.value.first ?? User()
+        userHeadImageView.sd_setImage(with: URL(string: remoteUser.avatar.value))
+    }
+}