How to open instruments in xcode

How do I use instruments in Xcode?

Press Command-I in Xcode, select Allocations from the list and press Choose. After a moment, you’ll see the Allocations instrument. It should look familiar because it looks a lot like Time Profiler. Click the record button in the top-left corner to run the app.

Do you use Xcode Instruments which ones?

If you have Xcode already, you already have Instruments. From Xcode’s product menu, choose Profile. Although Instruments is embedded within and is often used with Xcode, Instruments is a separate app which may be used independently as needed. You are free to choose how you start your performance analysis quest.

How do you use instruments app?

First of all, you need to build the app in profiling mode by selecting Product -> Profile or pressing CMD+I. Remember that you should profile your app only on the real device and not the simulator. Then you can select the SwiftUI template in the newly opened Instruments window and press the record button.

How do I create an Xcode profile?

There are several ways to start Instruments from Xcode.

Measuring Performance

  1. Click the Profile in Instruments button from a debug gauge report.
  2. Choose Product > Profile.
  3. Specify an Instrument in the Profile action for a scheme.

What is Xcode provisioning profile?

A provisioning profile is a collection of digital entities that uniquely ties developers and devices to an authorized iPhone Development Team and enables a device to be used for testing. Each Development Provisioning Profile will contain a set of iPhone Development Certificates, Unique Device Identifiers and an App ID.

What is Xcode profile?

Xcode provides Instruments which supports various tools for memory profiling, cpu profiling, time profiling, network profiling, etc etc. This profiling tools not only help us find the issues in app, but also go a long way in detecting and fixing them if done properly.

How do I find my provisioning profile?

There are two ways to do this:
  1. You can check your provisioning profile in AppStore Connect to see if the service is active.
  2. You can download your profile from the mag+ Publish portal and open it in a text editor to check if a certain string appears.

How do I see threads in Xcode?

Toggle the first view control on the top right side of the xcode window and the debug area should appear.
  1. Once you have done that an area like the one in the image below will appear.
  2. and select view process by thread.
  3. For the threads to appear your application has to be paused.

How do I run a main thread in Swift?

How to run a piece of code on main thread in Swift 4
  1. func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { }
  2. DispatchQueue. main. async{ //put your code here }
  3. self. tableView?. reloadData()
  4. DispatchQueue. main. async{ self. tableView. reloadData() }

How do I enable thread sanitizer in Xcode?

Enabling Thread Sanitizer
  1. Open your Xcode Project.
  2. Edit your scheme.
  3. Select your scheme on which you want to enable TSan.
  4. Select the Diagnostics tab.
  5. Check the Thread sanitizer tick box that appears within the Diagnostics tab.

How do I debug threads in Xcode?

Toggle the first view control on the top right side of the xcode window and the debug area should appear.
  1. Once you have done that an area like the one in the image below will appear.
  2. and select view process by thread.
  3. For the threads to appear your application has to be paused.

What is main thread checker Xcode?

The Main Thread Checker is a standalone tool for Swift and C languages that detects invalid usage of AppKit, UIKit, and other APIs on a background thread. Updating UI on a thread other than the main thread is a common mistake that can result in missed UI updates, visual defects, data corruptions, and crashes.

How do I use main thread checker?

Turning on main thread checker
  1. Open your Xcode Project.
  2. Edit your scheme.
  3. Select your run scheme.
  4. Select the Diagnostics tab.
  5. Check the Main Thread Checker tick box that appears within the Diagnostics tab.
  6. Check the Pauses on issues tick box. ( Optional)

How do I debug IOS crash?

1 Answer
  1. Inside Xcode, switch to the Breakpoints Navigator (left menu, seventh icon from left to right, it looks just like a breakpoint)
  2. Click the + symbol in the lower left corner and choose “Add Exception Breakpoint”
  3. Run and crash.

What is iOS crash?

When an application crashes on an iOS device, the operating system creates a crash report or a crash log. The report is stored on the device. You want any crash logs your users generate. The more crash logs you have, the better equipped you are to find and diagnose weaknesses in your app!

How do I collect iOS device logs?

Connect your iOS to your computer with a USB or Lightning cable. Go to Window > Devices and select your device from the list. Click the “up” triangle at the bottom left of the right hand panel. All logs from all apps on the device will be displayed here.

How do I get iPhone app crash logs?

Find the logs on your iOS device
  1. Open Settings app.
  2. Tap Privacy.
  3. Tap Analytics & Improvements.
  4. Tap Analytics Data.
  5. Scroll down and select any items that start with “Pocket” and show the date you encountered the crash.
  6. Tap the Share button at the top right corner, and email the crash log to Pocket.

How do I know if XCode has crashed?

Accessing Crash Logs

Use Mac console app to view any crash logs from your Mac or Simulator. On the device, Settings, Privacy, Analytics, Analytics Data you can see all of the logs that are saved to disk and your users can share a log directly from this screen.

How do I submit a crash report to an iPhone app?

To locate and email crash reports for iOS, iPadOS, watchOS, and tvOS apps:
  1. Open the Analytics & Improvements section of Settings on the device.
  2. Tap Analytics Data.
  3. Locate the log for your app.
  4. Select the desired log.
  5. Tap the Share icon, and select Mail to send the crash report as a mail attachment.

How do I get Xcode logs on my iPhone?

Getting device logs from Xcode
  1. Connect your phone to your laptop and open Xcode.
  2. Select Device and Simulators from the Window menu.
  3. Select your device from the left panel.
  4. Make sure that the logs are expanded.
  5. Click the Save Console button (at the bottom right) to save the log information within the console.

Does iPhone have an activity log?

The Activity Log page will now display all the activity on your entire account, listed in chronological order. Here you can see the loop you were working on, as well as the documents.
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