Question: Is there any way to check my application is enable with TouchID,

How can i check if my application is enable with TouchID,

For example :

DropBox have capability to enable figure print sensor enable. now is there any method to check if my application showing TouchID screen based on touchid enable.

Answer: 
You do not want to check the iOS version, sure, it might work but it is a bad practice. Check for the feature instead. See if LAContext is available.

```
if ([LAContext class]) {
    // touch ID is available for the device
    // call canEvaluatePolicy:error to see if the user has set a fingerprint.
}

```
assuming ios 8+ deployment target

```
    var authError : NSError?
    if LAContext().canEvaluatePolicy(LAPolicy.DeviceOwnerAuthenticationWithBiometrics, error: &authError) {
          // do your thing dependent on touch id being useable on the device
    }

```

in case you still need to support ios7 do the extra hoop

```
   if NSClassFromString("LAContext") != nil && LAContext().canEvaluatePolicy(LAPolicy.DeviceOwnerAuthenticationWithBiometrics, error: &authError) {

```