AgentSkillsCN

ios-watch-logs

从连接的iPhone实时流式传输日志到控制台和文件。仅显示带有[APP]前缀的应用程序显式日志消息。当需要监控应用程序行为、调试或查看日志时，可使用此方法。

SKILL.md
--- frontmatter
name: ios-watch-logs
description: Start real-time log streaming from connected iPhone to console and file. Shows only app's explicit log messages with [APP] prefix. Use when monitoring app behavior, debugging, or viewing logs.

iOS Watch Logs

Overview

Streams logs from a USB-connected iPhone in real-time using pymobiledevice3, filtering to show only the app's explicit log messages (those with [APP] prefix).

When to Use

Invoke this skill when the user:

  • •Asks to "watch iOS logs"
  • •Wants to "see what the app is doing"
  • •Says "monitor the iPhone"
  • •Asks to "stream logs from iPhone"
  • •Wants to debug or see real-time app behavior
  • •Says "show me the logs"

Prerequisites

  • •iPhone connected via USB
  • •pymobiledevice3 installed (pip3 install pymobiledevice3)
  • •Device must be trusted
  • •App must be running on the device to see logs

Option 1: Use Screen Capture App (Recommended)

The iPhone screen capture app has an integrated console:

bash
cd miso/platforms/ios/development/screen-capture/imp
./iphone_screencap.sh

Click the ">" button to open the live log console.

Option 2: Terminal Streaming

Stream logs directly in terminal:

bash
pymobiledevice3 syslog live 2>/dev/null | grep "\[APP\]"

Option 3: Claude Reading Logs

Claude can read recent logs with:

bash
timeout 3 pymobiledevice3 syslog live 2>/dev/null | grep "\[APP\]" | tail -30

Log Format

The app's Logger class prefixes messages with [APP]:

code
NoobTest{...}[12345] <INFO>: [APP] [PostView] Loading post 14
NoobTest{...}[12345] <DEBUG>: [APP] [Network] Response: 200 OK

Adding Logs in Code

Use the app's Logger class in Swift:

swift
Logger.shared.info("[MyFeature] Something happened")
Logger.shared.debug("[MyFeature] Debug info: \(value)")
Logger.shared.error("[MyFeature] Error: \(error)")

Common Issues

No logs appearing:

  • •Ensure the app is running on the device
  • •Check that logs use [APP] prefix
  • •Verify pymobiledevice3 is installed: pip3 install pymobiledevice3
  • •Device must be trusted and unlocked

pymobiledevice3 not found:

  • •Install: pip3 install pymobiledevice3

Only system logs showing:

  • •The app's Logger must prefix messages with [APP]
  • •This filters out thousands of framework/system messages

Notes

  • •The [APP] prefix filters out thousands of system messages
  • •Screen capture app console auto-scrolls to latest logs
  • •Use timeout command to get a snapshot without blocking