iOS 7.0.3中的NSMutableAttributedString崩溃

问题描述

几天后，我发生了崩溃，只发生在iOS中，代码如下：

Since a few days, I have a crash that only happens in iOS with the following line of code

[myAttributedString addAttribute:NSFontAttributeName
                                             value:[UIFont fontWithName:@"HelveticaNeue-Italic" size:myLabel.font.pointSize]
                                             range:rangeOfSubString];

调试器给出的原因是

由于未捕获的异常'NSInvalidArgumentException'终止应用程序，原因：'NSConcreteMutableAttributedString addAttribute：value：range :: nil value'
例外类型：SIGABRT

"Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'NSConcreteMutableAttributedString addAttribute:value:range:: nil value'"Exception Type: SIGABRT

I从文档中知道它的价值是零。知道为什么[UIFont fontWithName：@HelveticaNeue-Italicsize：myLabel.font.pointSize]会在iOS 7.0.3中返回nil吗？ （它在iOS 7.0.2中运行得非常好）

I know from the documentation that it's the value that's nil. Any idea why [UIFont fontWithName:@"HelveticaNeue-Italic" size:myLabel.font.pointSize] would return nil in iOS 7.0.3? (it was working perfectly well in iOS 7.0.2)

推荐答案

Helvetica neue的字体似乎不见了

That typeface of Helvetica neue seems to be missing

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