一些提示: -确保项目处于调试模式:产品-编辑方案... =>构建配置=调试 -添加异常断点:切换到断点导航器并添加异常断点[Exception:Objective-C]

Some hints: - Ensure that project in Debug mode: Product - Edit scheme... => Build configuration = Debug - Add Exception break point: Switch to Breakpoint Navigator and Add Exception Breakpoint [Exception: Objective-C]