Fix for Landscape Takeovers Notifs, Tiny fixes for Xcode 5.1

In-App notifications set to type takeover were crashing landscape-only apps. This version filters them out and logs the issue silently.

Xcode 5.1 presented some new warnings having to do with typecasting (from double to float) that were fixed.

Minor fix to in-app tracking timestamps

[NSDate timeSinceReferenceDate] does not produce a standard unix timestamp and was being used in an in-app notifications tracking call. By changing it to [NSDate date], the mixpanel library is able to handle the conversion from an NSDate object to the appropriate timestamp further down the line.

This tracking call only affects a planned dashboard for in-app notifications and will not cause any noticeable or functional changes to apps regardless of whether or not they are using the feature.

Only use IFA if AdSupport is included.

As of this version (2.3.1) Mixpanel no longer requires the AdSupport.framework due to reports of app-store rejections for apps that do not serve ads where Mixpanel is using the IFA to identify users

From now on, Mixpanel will detect if the host application is using AdSupport.framework and, if so, will automatically continue to use IFA as the default identifier. For apps that do not serve ads and do not have the AdSupport.framework included, Mixpanel will now default to using the identifierForVendor (IFV).

Also thanks to @orta, @ksm, and @dblock for some other bugfixes in this release.

In-App Notifications

This release includes the new in-app notifications feature. See https://mixpanel.com/inapp-notifications/

Archive bug fix

Fixed an issue where archiving was locking up the main app thread when a user backgrounded and immediately foregrounded his or her app.

Archiving also now copies relevant queue objects before archiving them to avoid errors associated with nonatomic modifying of the originals.

Fix survey presentation bug

There were circumstances where the Mixpanel library would attempt to show a survey on top of a ViewController that was itself in the process of going through a presentation transition, leading to a NSInternalInconsistencyException.

This release fixes the issue by making sure that the current ViewController is not in the process of being presented before showing a survey.

Add MIXPANEL_NO_IFA to older version of lib

Apple's app review team may reject apps that use the AdSupport framework's advertisingIdentifier (IFA) but do not show ads. The MIXPANEL_NO_IFA preprocessor macro—you can set it in your target's XCode build settings—will strip IFA usage out of the Mixpanel lib. Instead of IFA, we'll use UIDevice's identifierForVendor as the default Mixpanel distinct ID.

This functionality is already in the most recent versions of the lib. However, apps that still want to support iOS 5 must use the 2.0.x releases. This release makes MIXPANEL_NO_IFA available to them.

Fix bug using surveys with iOS6.

This release fixes a bug in version 2.2.0 of the Mixpanel library where surveys shown iOS6 devices would cause an application crash.

Cause

We switched to using boundingRectWithSize:options:attributes:context: instead of the deprecated sizeWithFont: without doing a runtime check to see if the feature was supported on the user's device.

Affected users

Users were affected if all the following conditions were met.

• The user was running iOS6
• They were running an app using Mixpanel library v2.2.0
• They were shown a survey

Solution

This release (2.2.1) fixes the issue in the Mixpanel library. We have also modified our server code so that affected users will not be shown surveys, and will therefore not encounter the bug.

ARC Compatibility

This release makes the Mixpanel library ARC compatible.

If you were previously using this library in an ARC-enabled project and you were using the -fno-objc-arc flag on all Mixpanel files, you can now remove that flag.

If you are using Mixpanel in a project that doesn't have ARC enabled, you will have to add the -fobjc-arc flag to all the Mixpanel files.

You can add and remove compiler flags on a per-file basis in XCode, in your project settings under Build Phases > Compile Sources.

Surveys

Adds Mixpanel Surveys functionality.