registerIconFontWithURL without SIM card inserted will hang app

[yangyi]

It seems an bug from iOS, the app hangs when call CGFontCreateWithDataProvider

The issue reproduced on iOS 7.1.2(iPhone 4S), and the bug reported here https://alpha.app.net/jaredsinclair/post/18555292

There is a workaround, call [UIFont familyNames] before call CGFontCreateWithDataProvider

But the issue does not happened on every app, another app (also developed by me) using FontAwesomeKit is working fine (using the same code for init font, [FAKFontAwesome spoonIconWithSize:28] will cause the problem).

Is there any debug log is helpful for your guys?

[PrideChung]

Can't reproduce on my iPhone5 iOS 7.1.2, maybe it's hardware related? I will test it on more devices.

[matthewkrueger]

I can reproduce this issue simply by enabling airplane mode on my iPhone 5, iOS 7.1. The app will hang every time on

CGFontRef newFont = CGFontCreateWithDataProvider(fontDataProvider);

in registerIconForUrl.

[matthewkrueger]

Calling [UIFont familyNames] before the offending line resolves it for me! The link in the original post describes the issue and work around.