I am making a game, and I didnt realise that I set the targeted device as iOS 8. I went to change it to iOS 7 so that it is compatible with more devices. However, as tested on iOS 7, I realised that the UIVisualEffectView does not work. Is there anyway I can have the UIVisualEffectView to only appear when the running device has iOS 8 and not iOS 7?
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Read the "SDK Compatibility Guide" in the docs. It covers this. Oh wait, that really only covers Objective-C. – rmaddy Sep 11 '14 at 15:59
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The interoperability document discusses how to check for optional/new functionality. – David Berry Sep 11 '14 at 16:22
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How do you create the `UIVisualEffectView`? If it's in code, show us the code. – rob mayoff Sep 14 '14 at 01:59
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You can check for UIVisualEffectView being available like this:
if (NSClassFromString("UIVisualEffectView") != nil) {
NSLog("UIViewVisualEffectView is available");
// Use UIVisualEffectView
} else {
NSLog("UIViewVisualEffectView is not available");
// Do something else
}
This approach is nice because the code documents why the if statement is being used, and you don't have to remember the OS version when a class was introduced.
MaxGabriel
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Check out this thread. You can get the current iOS version using one of the macros in this answer, then decide which classes to use. For example:
#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")) {
// Use UIVisualEffectViewClass
} else {
// Use another class
}
If you're using swift, ignore the macro part, and just use the code.
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michaelsnowden
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