问题
Unfortunately I auto-updated Xcode to Version 5.1.1 (5B1008), and now one of my apps crashes in a very strange way.
The app is a PhoneGap 3.4 (+ jQuery Mobile 1.3.1) hybrid app, the crash happens when I try to open a JQM page that contains ~20 JQM checkbox.
The crash happens in CoreGraphics CGPathAddLineToPoint called by WebCore WebCore::RenderThemeIOS::paintCheckboxDecorations in the WebThread, I guess when WebCore attempts to render the checkboxes on then JQM page.
The console reads:
Assertion failed: (CGFloatIsValid(x) && CGFloatIsValid(y)), function void CGPathAddLineToPoint(CGMutablePathRef, const CGAffineTransform *, CGFloat, CGFloat), file Paths/CGPath.cc, line 224.
(lldb)
Any other JQM page NOT containing checkboxes is displayed properly, and it does not crash the app.
EDIT: interestingly, the crash is triggered by this line of Javascript:
$('#my_checkbox').prop("checked", my_boolean_value).checkboxradio("refresh");
If I disable it, the JQM page shows up. But then, even if the above line is disabled, if I click on any checkbox, it crashes again, with the same above Assertion failed message. (I guess because JQM toggles the check/unchecked class.)
I already performed all the tricks I could think of (clean, disable debugger, reboot, reinstalled Xcode), with no luck.
Any ideas on how to solve this issue?
回答1:
I discovered the following very irritating fact: the crash is triggered by a
opacity:.01
directive, attached to the JQM .ui-checkbox class in my CSS.
Changing it to:
opacity:0
prevents the crash (which I still do not know if it is due to an Xcode bug or an iOS bug).
Interestingly, setting any value greater than 0 triggers the crash.
回答2:
I had a similar issue,but it was caused by an attributed text link. I ended up having to change "Continue..." to "Continue"
来源：https://stackoverflow.com/questions/23413205/updated-to-xcode-5-1-1-causes-strange-crash-of-ios-app