UITextField點擊輸入框以後會出現系統警告打印問題

點擊UITextField就會出現以下警告：

[MC] System group container for systemgroup.com.apple.configurationprofiles path is /Users/zjn-apple/Library/Developer/CoreSimulator/Devices/F57050BE-7D57-48DD-A8FA-23CD8C16FEF9/data/Containers/Shared/SystemGroup/systemgroup.com.apple.configurationprofiles

2017-01-09 08:08:56.829260 BaseProgram[1208:54850] [MC] Reading from private effective user settings.

解決方案：從xcode菜單中：Product > Scheme > Edit Scheme
Environment Variables 添加一欄name：OS_ACTIVITY_MODE  Value:disable