https://archimboldi.me/posts/%E7%BF%BB%E8%AF%91-uidebugginginformationoverlay.html

http://ryanipete.com/blog/ios/swift/objective-c/uidebugginginformationoverlay/

let overlayClass = NSClassFromString("UIDebuggingInformationOverlay") as? UIWindow.Type_ = overlayClass?.perform(NSSelectorFromString("prepareDebuggingOverlay"))

app启动后, 在statusbar上双指点击即可调出.

发布时记得要删除这个功能. 可以会被拒绝.

UIDebuggingInformationOverlay 调试