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| extern uint32_t dyld_get_program_sdk_version() WEAK_IMPORT_ATTRIBUTE; | |
| extern BOOL DZApplicationUsesLegacyUI(void) | |
| { | |
| static dispatch_once_t onceToken; | |
| static BOOL legacyUI = NO; | |
| dispatch_once(&onceToken, ^{ | |
| uint32_t sdk = __IPHONE_OS_VERSION_MIN_REQUIRED; | |
| if (dyld_get_program_sdk_version != NULL) { | |
| sdk = dyld_get_program_sdk_version(); | |
| } | |
| Boolean hasLegacy; | |
| // The OS may set these at will | |
| Boolean forceLegacy = CFPreferencesGetAppBooleanValue(CFSTR("UIUseLegacyUI"), kCFPreferencesCurrentApplication, &hasLegacy); | |
| Boolean requireModern = CFPreferencesGetAppBooleanValue(CFSTR("UIForceModernUI"), kCFPreferencesCurrentApplication, NULL); | |
| legacyUI = ((sdk < 0x70000) && (!(hasLegacy && forceLegacy) || requireModern)); | |
| }); | |
| return legacyUI; | |
| } |
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detect legacy mode at runtime