iOS 10.3 UISegmentedControl setTitleTextAttributes Crash

Question

iOS 10.3 crashes on UISegmentedControl's setTitleTextAttributes method.

Question:

What is the reason for the crash?
What is the solution?

Note: Have already reported this issue to apple, but haven't yet heard from them. https://openradar.appspot.com/31448227

Sample Code:

class ViewController: UIViewController {

    @IBOutlet private weak var segmentedControl: UISegmentedControl!

    override func viewDidLoad() {
        super.viewDidLoad()         
        //Crash!        
        segmentedControl.setTitleTextAttributes([UIFont.systemFont(ofSize: 14.0) : NSFontAttributeName], for: .normal)
    }
}

EDIT

As @vedian pointed out, it should be [key : value] and not the other way around, but the above code doesn't crash on iOS versions below 10.3.

any code? that would be easier. Any attribute or you have tried only font? — Lu_, Apr 06 '17 at 07:41
@Lu_ well i migrated to swift 3.1 as well, but it still crashes, you can test yourself. — Burhanuddin Sunelwala, Apr 06 '17 at 07:46
@BurhanuddinSunelwala it works for me. Check your IBOutlet connection. — RajeshKumar R, Apr 06 '17 at 07:56
10.2 and attributes should be in `[key:value]` format `[NSFontAttributeName: UIFont.systemFont(ofSize: 10.0)]`. Try changing it. — RajeshKumar R, Apr 06 '17 at 08:00

score 3 · Accepted Answer · answered Apr 06 '17 at 07:49

3

You are causing the issue, not Apple.

A dictionary is created in order first key then value.

segmentedControl.setTitleTextAttributes([NSFontAttributeName : UIFont.systemFont(ofSize: 14.0)], for: .normal)

answered Apr 06 '17 at 07:49

vadian

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Alright, will try this. I din't notice that. Thanks. But why does it work with swift 2.3? – Burhanuddin Sunelwala Apr 06 '17 at 07:51

score 0 · Answer 2 · answered Apr 06 '17 at 07:49

0

use

    segmentedControl.setTitleTextAttributes([NSFontAttributeName: UIFont.systemFont(ofSize: 14.0)], for: .normal)

instead of

segmentedControl.setTitleTextAttributes([UIFont.systemFont(ofSize: 14.0) : NSFontAttributeName], for: .normal)

answered Apr 06 '17 at 07:49

Sandeep P

94
7

iOS 10.3 UISegmentedControl setTitleTextAttributes Crash

2 Answers2