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I usually do debugging with support of print() method at which shows on Xcode logs as long as it is not terminated. However I have some conditions that I need to test in didFinishLaunchingWithOptions method of AppDelegate when the app's been terminated and then reopened. By "reopened" I mean by clicking on the app on simulator/iphone instead of running it from Xcode again. Sadly after termination print logs do not show. Any other way I could do it? Thanks!
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When you run an application in Xcode, the debugger is automatically started and attached to the process of the application. Click the Run button in the top left or press Command + R. From the moment the application is up and running, we can start inspecting the process and, if necessary, debug it.
On iOS, nothing gets called when your app gets killed while in the background. At the point where you move from foreground to background, you are supposed to store all the information that is needed for your app to come back looking unchanged if it gets killed and launched again.
The “Debug executable” checkbox specifies whether or not you want to run with the debugger enabled. Once running, you can use Debug > Attach to Process on a process that has been launched with debugging disabled if needed. It seems like all this does is start your app with the debugger attached.
Click on the options near the Appname on the upper-left corner of Xcode.
Click on Edit Scheme -> Check the Wait for executable to launch option and run as you usually do. Happy Coding :) .
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In Swift 4.2,
var paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
let documentsDirectory = paths[0]
let fileName = "\(Date()).log"
let logFilePath = (documentsDirectory as NSString).appendingPathComponent(fileName)
freopen(logFilePath.cString(using: String.Encoding.ascii)!, "a+", stderr)
Just add this block of code in
application:didFinishLaunchingWithOptionsmethod in the app delegate file and it will create a log file in app document directory on iPhone which logs all console log events. You need to import this file fromiTunesto see all console events.Note: In the .plist file make sure that Application supports
iTunes file sharingexists and is set toYESso that you can access throughiTunes.To get Logfiles: Launch
iTunes, after your device has connected select Apps - select your App - in Augmentnt Document you will get your file. You can then save it to your disk
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