String to float conversion in Swift Beta 5

Question

The following code doesn't work anymore in Beta 5.

let device = UIDevice.currentDevice()
if (device.systemVersion.bridgeToObjectiveC().floatValue < 8.0) {
    [skipped]
}

Also, it's not possible to downcast a string to float.

let device = UIDevice.currentDevice()
let version: Float = device.systemVersion as Float

The snippet above returns the 'String' is not convertible to 'Float' error.

Any ideas how should we test the OS version now? Thanks.

Thomas Zoechling · Accepted Answer · 2014-08-07 09:26:23Z

7

floatValue is a method of NSString.
Since bridgeToObjectiveC() is no longer available with Xcode 6 Beta 5, you can use the as operator to cast your Swift String to NSString:

(device.systemVersion as NSString).floatValue

answered Aug 7, 2014 at 9:26

Thomas Zoechling

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2 Comments

Woodstock Over a year ago

Just out of interest, do you know why we no longer have bridgeToObjC?

Thomas Zoechling Over a year ago

No idea but probably because in most cases one can achieve the same using the built-in type casting keyword. So bridgeToObjectiveC() would introduce redundancy and worse legibility.

Kirsteins · Accepted Answer · 2014-08-07 09:32:02Z

2

I am using this approach for now

("1.3" as NSString).floatValue

edited Aug 7, 2014 at 9:32

answered Aug 7, 2014 at 9:24

Kirsteins

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1 Comment

Abhishek Bedi Over a year ago

This wont work for ("17.4.6" as NSString).floatValue

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