Other macOS APIs

Adjust the log level

You can control the amount of log messages that show up from App Center in the console. Use the setLogLevel:-API to enable additional logging while debugging. By default, it is set to MSLogLevelAssert for the App Store environment and MSLogLevelWarning otherwise.

To have as many log messages as possible, use MSLogLevelVerbose/MSLogLevel.Verbose.

[MSAppCenter setLogLevel:MSLogLevelVerbose];

Identify installations

The App Center SDK creates a UUID for each device once the app is installed. This identifier remains the same for a device when the app is updated and a new one is generated only when the app is re-installed. The following API is useful for debugging purposes.

NSUUID *installId = [MSAppCenter  installId];
var installId = MSAppCenter.installId()

Identify users

The App Center SDK supports setting a user ID that is used to augment crash reports. To use this capability:

  1. Configure the App Center SDK by calling :start:withServices: as described in the App Center SDK Getting started guide.
  2. Set a userID in the SDK using the following code:
[MSAppCenter setUserId:@"your-user-id"];

After setting a user ID, you can use App Center's search feature to search for specific crash reports associated with the ID. Learn more in App Center's search documentation.


The value for the user id is limited to 256 characters.

Disable all services at runtime

If you want to disable all App Center services at once, use the setEnabled API. When disabled, the SDK will not forward any information to App Center.

[MSAppCenter setEnabled:NO];

To enable all services at once again, use the same API but pass YES/true as a parameter.

[MSAppCenter setEnabled:YES];

The state is persisted in the device's storage across application launches.


This method must only be used after MSAppCenter has been started.

Change state of service in runtime

Enable or disable desired services at the runtime with following code:

[MSAnalytics setEnabled:NO];


This method must only be used after MSAnalytics has been started.

Check if App Center is enabled

You can also check if App Center is enabled or not.

[MSAppCenter isEnabled];


This method must only be used after MSAppCenter has been started, it will always return NO or false before start.

Check App Center SDK version at runtime

You can get the version of App Center SDK that you are currently using.

[MSAppCenter sdkVersion];

Use custom properties

App Center allows you to define custom properties as key value pairs in your app. You may use custom properties for various purposes. For instance, you can use custom properties to segment your users, and then send push notifications to a specific audience.


Only devices that have Push successfully registered are matched in audiences. As a consequence, the iOS simulator can not be used to test audience matching.

You can set custom properties by calling the setCustomProperties API. A valid key for custom property should match regular expression pattern ^[a-zA-Z][a-zA-Z0-9]*$. A custom property's value may be one of the following types: NSString, NSNumber, BOOL and NSDate.

MSCustomProperties *customProperties = [MSCustomProperties new];
[customProperties setString:@"blue" forKey:@"color"];
[customProperties setNumber:@(10) forKey:@"score"];
[MSAppCenter setCustomProperties:customProperties];
var customProperties = MSCustomProperties()
customProperties.setString("blue", forKey: "color")
customProperties.setNumber(10, forKey: "score")


If you set the same custom property more than once, previous values will be overwritten by the last one.

You may remove any custom property by calling the clearPropertyForKey API. This will only remove the value of the property for a device. It will not remove the property name from App Center portal.

MSCustomProperties *customProperties = [MSCustomProperties new];
[customProperties clearPropertyForKey:@"score"];
[MSAppCenter setCustomProperties:customProperties];
var customProperties = MSCustomProperties()
customProperties.clearProperty(forKey: "score")