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控制台打印的信息如下
2016-10-15 10:13:17.774543 LGLSearch-Dome[1656:356106] subsystem: com.apple.UIKit, category: HIDEventFiltered, enable_level: 0, persist_level: 0, default_ttl: 0, info_ttl: 0, debug_ttl: 0, generate_symptoms: 0, enable_oversize: 1, privacy_setting: 2, enable_private_data: 0 2016-10-15 10:13:17.777413 LGLSearch-Dome[1656:356106] subsystem: com.apple.UIKit, category: HIDEventIncoming, enable_level: 0, persist_level: 0, default_ttl: 0, info_ttl: 0, debug_ttl: 0, generate_symptoms: 0, enable_oversize: 1, privacy_setting: 2, enable_private_data: 0
解决办法：
Xcode8里边 Edit Scheme... -> Run -> Arguments, 在Environment Variables里边添加 OS_ACTIVITY_MODE ＝ disable
步骤1.
步骤2.
步骤3.
结束设置
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原文地址：http://www.cnblogs.com/ljmaque/p/xcode8.html
