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TUIKit/TUICallKit/TUICallKit-Swift/View/Component/FloatView/FloatingWindowButton.swift

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+//
+//  FloatingWindowButton.swift
+//  TUICallKit
+//
+//  Created by vincepzhang on 2023/2/15.
+//
+
+import Foundation
+
+class FloatingWindowButton: UIView {
+    
+    let mediaTypeObserver = Observer()
+    
+    let floatButton: FloatingWindowCustomButton = {
+        let floatButton = FloatingWindowCustomButton(type: .system)
+        return floatButton
+    }()
+    
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+        
+        updateImage()
+        registerObserveState()
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    deinit {
+        TUICallState.instance.mediaType.removeObserver(mediaTypeObserver)
+    }
+    
+    // MARK: UI Specification Processing
+    private var isViewReady: Bool = false
+    override func didMoveToWindow() {
+        super.didMoveToWindow()
+        if isViewReady { return }
+        constructViewHierarchy()
+        activateConstraints()
+        bindInteraction()
+        isViewReady = true
+    }
+    
+    func constructViewHierarchy() {
+        addSubview(floatButton)
+    }
+    
+    func activateConstraints() {
+        floatButton.snp.makeConstraints { make in
+            make.center.equalTo(self)
+            make.width.height.equalTo(24)
+        }
+    }
+    
+    func bindInteraction() {
+        floatButton.addTarget(self, action: #selector(clickFloatButton(sender: )), for: .touchUpInside)
+    }
+    
+    // MARK:  Action Event
+    @objc func clickFloatButton(sender: UIButton) {
+        WindowManager.instance.showFloatWindow()
+    }
+    
+    // MARK: Register TUICallState Observer && Update UI
+    func registerObserveState() {
+        TUICallState.instance.mediaType.addObserver(mediaTypeObserver) { [weak self] newValue, _ in
+            guard let self = self else { return }
+            self.updateImage()
+        }
+    }
+    
+    func updateImage() {
+        if let image = TUICallKitCommon.getBundleImage(name: "icon_min_window") {
+            floatButton.setBackgroundImage(image, for: .normal)
+        }
+    }
+}
+
+class FloatingWindowCustomButton: UIButton {
+    override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
+        let expandedBounds = bounds.insetBy(dx: -6, dy: -6)
+        return expandedBounds.contains(point) ? self : nil
+    }
+}