CODEWITHSUNDEEP
iosxcodeswiftswift23dtouch
RichAppz
RichAppz

Reputation: 1529

3D Touch Capability Check Issue - Swift

Strange issue, I am using the standard check to see if the device has 3D Touch. It is wrapped with iOS9 check, which is passing, but not passing the .Available if statement on my iPhone 6S, which is running iOS9.1 and has 3D Touch enabled in Settings.

if #available(iOS 9.0, *) {
     if traitCollection.forceTouchCapability == .Available {
          registerForPreviewingWithDelegate(self, sourceView: view)
          constantChange = cstInfoBar.constant + 20
     }
}

I have set a breakpoint and I am receiving the following:

(lldb) po traitCollection.forceTouchCapability
error: <EXPR>:1:17: error: 'forceTouchCapability' is only available on iOS 9.0 or newer
traitCollection.forceTouchCapability
                ^
<EXPR>:1:17: note: add 'if #available' version check
traitCollection.forceTouchCapability
                ^
<EXPR>:1:17: note: add @available attribute to enclosing instance method
traitCollection.forceTouchCapability
                ^
<EXPR>:1:17: note: add @available attribute to enclosing extension
traitCollection.forceTouchCapability
                ^
<EXPR>:9:9: warning: initialization of variable '$__lldb_error_result' was never used; consider replacing with assignment to '_' or removing it
    var $__lldb_error_result = __lldb_tmp_error
    ~~~~^~~~~~~~~~~~~~~~~~~~

The registerForPreviewingWithDelegate(self, sourceView: view) works outside of the if statement but not a good option to implement!

FURTHER INVESTIGATIONS

I tested the code in my MainViewController and it worked perfectly. This is an odd situation, I have found a work around for the moment.

Upvotes: 2

Views: 583

Answers (1)

JimmyB
JimmyB

Reputation: 337

I had the same problem: I was doing this check in viewDidLoad, which is before the object has traitCollection information. Deferring checks and logic until viewDidLayoutSubviews worked for me.

Upvotes: 2

Related Questions