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Sometimes when I'm putting on or taking off clothes, I accidentally bump the digital crown of my Apple Watch or AirPods Max, and then the volume suddenly becomes very loud, which has been bothering me for a long time. I followed the instructions in https://support.apple.com/zh-sg/guide/iphone/iphb71f9b54d/ios, but I couldn't find the relevant settings. The system prompt is to "Reduce Loud Audio", rather than to lower the volume (iOS 17.4). I searched, but I couldn't find any related apps in the App Store. I asked the AI and it provided a relevant solution, so I want to learn Swift and create an app myself (I've only been learning for less than a week). Here's the solution provided by the AI: The general idea is to listen for the routeChange event of AVAudioSession through NotificationCenter then use MPVolumeView to get the slider, and set the value of the slider to control the volume limit. However, when I debugged it, I found that it didn't work even after setting it. I would like to ask where the problem might be and how I should adjust it? @objc func setMaximumVolume () -> Void { if !enableMaxvolume { return; } let volumeView = MPVolumeView() if let slider = volumeView.subviews.first as? UISlider { slider.value = Float(self.maximumVolume / 100) print("setMaximumVolume: \(slider.value)") } }