ios - Use NSUserActivity and CoreSpotlight but still set iOS8 as Deployment Target -


is possible use new features of ios9 such nsuseractivity , corespotlight, still set development target 8.2 users ios8 can still use app?

i assume need ios version number check or use respondstoselector:.

is correct?

yes, in 1 of apps (actually have deployment target of ios 7). it's trivial do. make sure cssearchableindex class exists, make corespotlight framework optional, , write code prevent newer apis being run on devices earlier versions of ios.

you can guard code compiles under xcode 6 if had reason so.

example:

// ensure compiles base sdk of ios 9 or later #if __iphone_os_version_max_allowed >= 90000     // make sure class available , device supports corespotlight     if ([cssearchableindex class] && [cssearchableindex isindexingavailable]) {         dispatch_async(_somebgqueue, ^{             nsstring *somename = @"some name";             cssearchableindex *index = [[cssearchableindex alloc] initwithname:somename];             // rest of needed code index core spotlight         });     } #endif

in app delegate:

#if __iphone_os_version_max_allowed >= 90000 - (bool)application:(uiapplication *)application continueuseractivity:(nsuseractivity *)useractivity restorationhandler:(void(^)(nsarray *restorableobjects))restorationhandler {     if ([[useractivity activitytype] isequaltostring:cssearchableitemactiontype]) {         // activity represents item indexed using core spotlight, restore context related unique identifier.         // unique identifier of core spotlight item set in activity’s userinfo key cssearchableitemactivityidentifier.         nsstring *uniqueidentifier = [useractivity.userinfo objectforkey:cssearchableitemactivityidentifier];         if (uniqueidentifier) {             // process identifier needed         }     }      return no; } #endif

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