Main Thread Checker Violation
iOS
结论摘要
Main Thread Checker Violation indicates a concurrency failure on iOS that interrupts the current user flow.
现象表现
- Main Thread Checker Violation appears in crash logs
- The app exits or the UI flow stops
常见原因
- Shared state is mutated without coordination
- Object is used after lifecycle termination
如何验证
快速修复
- Add guard checks and a safe fallback path
- Disable or rollback the risky code path behind a flag
长期修复
- Enforce contracts with types, runtime checks, and tests
- Refactor ownership and lifecycle boundaries to remove the failure mode
示例堆栈
Main Thread Checker Violation in ProfileViewController.swift:42