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March 12, 2024 13:57
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A simple way to detect at runtime if we're running in UIKit legacy mode or the new "flat" variant. Written for our PDF iOS SDK (http://pspdfkit.com), where the precompiled binary needs to detect at runtime in what variant it's running. Want more stuff like that? Follow me on Twitter: http://twitter.com/steipete
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| // Taken from http://PSPDFKit.com. This snippet is under public domain. | |
| #define UIKitVersionNumber_iOS_7_0 0xB57 | |
| BOOL PSPDFIsUIKitFlatMode(void) { | |
| static BOOL isUIKitFlatMode = NO; | |
| static dispatch_once_t onceToken; | |
| dispatch_once(&onceToken, ^{ | |
| // We get the modern UIKit if system is running >= iOS 7 and we were linked with >= SDK 7. | |
| if (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_7_0) { | |
| isUIKitFlatMode = (NSVersionOfLinkTimeLibrary("UIKit") >> 16) >= UIKitVersionNumber_iOS_7_0; | |
| } | |
| }); | |
| return isUIKitFlatMode; | |
| } |
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iOS 15.2 is 0x1455