Check iPhone iOS Version

Question

Hi, I want to check if the iOS version of the device is greater then the 3.1.3 I tried things like [[UIDevice currentDevice].systemVersion floatValue]

but does not work, I just want a if (version > 3.1.3) { }

Does anybody know how to do this?

Thanks

Answer 1

Try:

NSComparisonResult order = [[UIDevice currentDevice].systemVersion compare: @"3.1.3" options: NSNumericSearch];
if (order == NSOrderedSame || order == NSOrderedDescending) {
    // OS version >= 3.1.3
} else {
    // OS version < 3.1.3
}

Answer 2

You can get the OS version using:

[[UIDevice currentDevice] systemVersion]

However, you should avoid relying on the version string as an indication of device or OS capabilities. There is usually a more reliable method of checking whether a particular feature or class is available. For example, you can check if UIPopoverController is available on the current device using NSClassFromString:

if(NSClassFromString(@"UIPopoverController")) {
    // Do something
}

Some classes, like CLLocationManager and UIDevice, provide methods to check device capabilities:

if([CLLocationManager headingAvailable]) {
    // Do something
}

Apple uses systemVersion in their GLSprite sample code, so my recommendation can't be absolute:

// A system version of 3.1 or greater is required to use CADisplayLink. The NSTimer
// class is used as fallback when it isn't available.
NSString *reqSysVer = @"3.1";
NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
if ([currSysVer compare:reqSysVer options:NSNumericSearch] != NSOrderedAscending)
    displayLinkSupported = TRUE;

Important Note: If for whatever reason you decide that systemVersion is what you want, make sure to treat it as an string or you risk truncating the minor revision number (eg. 3.1.2 -> 3.1).

Answer 3

Try this blog: http://cocoawithlove.com/2010/07/tips-tricks-for-conditional-ios3-ios32.html

Answer 4

I recommend:

if ([[[UIDevice currentDevice] systemVersion] floatValue] > 3.13) {
    ; // ...
}

credit: http://stackoverflow.com/questions/820142/how-to-target-a-specific-iphone-version

Answer 5

I find nice utility method in this link http://cocoabugs.blogspot.com/2010/09/utility-method-to-know-ios4-installed.html