iOS平台能否通过编程方式拨打电话且不显示电话号码？

Great question! Let's break down the possibilities and hard limitations here for iOS:

1. Traditional Cellular Calls (tel:// URL Scheme) #

If you're using the standard tel:// URL to trigger a call (like the code snippet below), you cannot hide or replace the displayed phone number—this is a non-negotiable restriction enforced by iOS.

if let callURL = URL(string: "tel://1234567890"), UIApplication.shared.canOpenURL(callURL) {
    UIApplication.shared.open(callURL)
}

The Phone app is a system-level component, and Apple prioritizes user transparency here. Users need to see exactly which number they're dialing for privacy and security reasons, so there's no public API or workaround to modify this behavior for regular cellular calls.

2. VoIP Calls with CallKit #

If you're willing to use VoIP (Voice over Internet Protocol) calls instead of traditional cellular calls, you gain full control over what's displayed to the user. Apple's CallKit framework lets you customize the entire call UI, including:

• Replacing the phone number with a custom name, label, or even a brand identifier
• Showing a custom avatar image instead of a number
• Hiding numerical identifiers entirely

Here's a quick example of how you'd define custom call details with CallKit:

import CallKit

// Define a unique ID for the call
let callUUID = UUID()
// Use a generic handle to show custom text instead of a number
let customHandle = CXHandle(type: .generic, value: "Customer Support")
let startCallAction = CXStartCallAction(call: callUUID, handle: customHandle)

// Request the call via CallKit
let transaction = CXTransaction(action: startCallAction)
CXCallController().request(transaction) { error in
    if let error = error {
        print("Failed to initiate call: \(error.localizedDescription)")
    }
}

A few critical notes about this approach:

• You'll need to implement a full VoIP service (either self-hosted or using a third-party SDK like Twilio, Sinch, etc.)
• Apple's App Store Review Guidelines strictly require CallKit to be used for real, functional VoIP services—don't attempt to use it to fake regular cellular calls, as your app will be rejected.

Quick Summary #

• For traditional cellular calls: No way to hide or replace the displayed number—it's a system-enforced restriction.
• For VoIP calls: Use CallKit to fully customize the call UI, including hiding the number or showing custom text.

内容的提问来源于stack exchange，提问作者Van Du Tran