System Compatibility for iOS
For PSPDFKit for iOS and iPadOS, we generally support n-1 versions of Apple’s iOS operating system.
|PSPDFKit for iOS Version||Required Xcode Version||Supported iOS Versions|
|PSPDFKit 11.4||Xcode 13 (SDK 15)||iOS 14, 15|
|PSPDFKit 11.0 - 11.3.2||Xcode 13 (SDK 15)||iOS 13, 14, 15|
|PSPDFKit 10.5 – 10.5.1||Xcode 12 (SDK 14)||iOS 13, 14, (15*)|
|PSPDFKit 10.0 – 10.4.2||Xcode 12 (SDK 14)||iOS 12, 13, 14|
|PSPDFKit 9.4 – 9.5.2||Xcode 11 (SDK 13)||iOS 12, 13|
|PSPDFKit 9.0 – 9.3.3||Xcode 11 (SDK 13)||iOS 11, 12, 13|
|PSPDFKit 8.3 – 8.5.2||Xcode 10 (SDK 12)||iOS 11, 12, (13*)|
|PSPDFKit 8.0 – 8.2.3||Xcode 10 (SDK 12)||iOS 10, 11, 12|
|PSPDFKit 7.6 – 7.7.2||Xcode 9 (SDK 11)||iOS 10, 11, (12*)|
|PSPDFKit 7.0 – 7.5.2||Xcode 9 (SDK 11)||iOS 9, 10, 11|
|PSPDFKit 6||Xcode 8 (SDK 10)||iOS 9, 10, (11*)|
|PSPDFKit 5||Xcode 7 (SDK 9)||iOS 8, 9, (10*)|
|PSPDFKit 4||Xcode 6 (SDK 8)||iOS 7, 8, (9*)|
|PSPDFKit 3||Xcode 5 (SDK 7)||iOS 6, 7, (8*)|
|PSPDFKit 2||Xcode 4 (SDK 6)||iOS 5, 6|
|PSPDFKit 1||Xcode 4 (SDK 5)||iOS 4, 5|
(*) Preliminary support only
As of May 2022, more than 96 percent of all active devices introduced in the last four years can use your product if your app supports iOS 14 upward. See Mixpanel statistics or Apple’s official device statistics for details.
It’s not possible for your app to support an older version of iOS that isn’t supported by PSPDFKit and then only link with PSPDFKit when running on newer iOS versions.
Architectures and Device Support
PSPDFKit supports ARM64 and x86_64, including bitcode for both architectures. Versions up to 8.2.3 included 32-bit architectures, ARMv7, and i386.
PSPDFKit for iOS supports all available iOS devices and form factors and includes many adjustments for optimal display for small and large screens.
For a detailed overview of iOS device compatibility, see the list of supported iOS releases.
In general, the most recent build will always require the most recent stable version of Xcode so that we can utilize all the improvements Apple is making on its tools and compiler infrastructure.
UIWebView was removed in v9.0 in September 2019 in favor of
SFSafariViewController. In December 2019, Apple announced that
UIWebView is no longer accepted in the App Store, saying “The App Store will no longer accept new apps using UIWebView as of April 2020 and app updates using UIWebView as of December 2020.”
Unsure which version you currently use? Learn how you can identify your current version.
Bitcode is included as of PSPDFKit 5 for iOS. Bitcode is architecture dependent, and we ship one bitcode slice per architecture (64-bit ARM). Since bitcode is an intermediary format, it’s larger and is responsible for about 80 percent of our framework size. This code is automatically stripped in the App Store and can easily be removed manually if you don’t yet support bitcode or use enterprise installs.
The base SDK is usually tied to a version of Xcode and includes specific compiler and linker versions. Apple encodes the base SDK into your application, and frameworks often have behavior specific to a base SDK version to ensure backward compatibility. This is the main reason PSPDFKit is tied to a specific version of Xcode. We use the latest compiler and language improvements and have a very sophisticated use of UIKit, which means we often have to tweak things so that everything runs perfectly whenever the base SDK is updated.
The deployment target is the minimum version supported by your application. If you see the following warning, it means PSPDFKit has detected that the Xcode version used is not the one we recommend:
PSPDFKit was built to be linked with Xcode X.X. (X). Your application has been built and linked with a different version (X). This may result in undefined behavior and bugs and is not supported. We strongly recommend updating PSPDFKit to a newer version that matches your current Xcode version. See https://pspdfkit.com/guides/ios/announcements/version-support for details.
This is a conservative warning, as Apple changes behavior based on the base SDK, including minor versions. This might trigger bugs in either Apple’s or PSPDFKit’s frameworks. We err on the side of extreme caution and issue a developer-only warning. We don’t block you from compiling a version of PSPDFKit with a newer version of the SDK; we just discourage it and print a warning.
Troubleshooting 64-Bit Requirements
Apple required 64-bit binaries starting 1 February 2015. Support for 32-bit binaries was dropped with iOS 11. If your deployment target is iOS 11 or later, you must have arm64 in your
Info.plist file. Make sure it contains the following entry:
<key>UIRequiredDeviceCapabilities</key> <array> <string>arm64</string> </array>
If you don’t, App Store Connect will report the error shown below.
ERROR ITMS-90502: “Invalid Bundle. Apps that only contain the arm64 slice must also have ‘arm64’ in the list of
UIRequiredDeviceCapabilities in Info.plist.”
Wikipedia’s List of iOS devices article also features an in-depth capability overview.