如何在swift中识别以编程方式生成的TextViews？

let textView = UITextView()
textView.tag = 1001 // 设置一个唯一的tag

if let foundTextView = self.view.viewWithTag(1001) as? UITextView {
    // 找到了对应的textView
}

func createTextView(completion: @escaping (UITextView) -> Void) {
    let textView = UITextView()
    // 配置textView
    completion(textView)
}

createTextView { [weak self] textView in
    // 使用textView
    self?.view.addSubview(textView)
}

import ObjectiveC

private var textViewKey: UInt8 = 0

extension UITextView {
    var customIdentifier: String? {
        get {
            return objc_getAssociatedObject(self, &textViewKey) as? String
        }
        set(newValue) {
            objc_setAssociatedObject(self, &textViewKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
        }
    }
}

let textView = UITextView()
textView.customIdentifier = "uniqueIdentifier"

if let textView = self.view.subviews.first(where: { $0 is UITextView && ($0 as? UITextView)?.customIdentifier == "uniqueIdentifier" }) as? UITextView {
    // 找到了对应的textView
}