iOS 防止截屏录屏

通过官方 api 无法实现
这里通过 UITextField.isSecureTextEntry 奇技淫巧, 截屏时系统自动隐藏内容实现

通知

• UIApplication.userDidTakeScreenshotNotification 截屏通知 (截图已经保存相册)
• UIScreen.capturedDidChangeNotification 录屏通知

密码框

let textfeild = UITextField()
textfeild.isSecureTextEntry = true
self.view.addSubview(textfeild)

截屏/录屏 一劳永逸

1. 设置 UITextField.isSecureTextEntry
2. 将私密内容放在 UITextField 中
3. 截图后 scrollView 被隐藏

// textfeild
let textfeild = UITextField(frame: self.view.bounds)
textfeild.isSecureTextEntry = true
self.view.addSubview(textfeild)

// scrollView
if let view = textfeild.subviews.first {
    view.isUserInteractionEnabled = true
    view.addSubview(scrollView)
}else{
    textfeild.addSubview(scrollView)
}

// other ...