xcode 如何解决 NSInvalidArgumentException 错误？
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How to solve NSInvalidArgumentException error?
提问by user5908520
My app is crashing intermittently for users, but unfortunately I am not able reproduce the problem on any of my devices. The reported error is:
我的应用程序为用户间歇性崩溃，但不幸的是我无法在我的任何设备上重现该问题。报告的错误是：
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'NSConcreteAttributedString initWithString:: nil value'
由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“NSConcreteAttributedString initWithString:: nil value”
The log trace is not clear about the crash source. I have attached a log trace. I'm looking for any pointers that can help me to track this down.
日志跟踪不清楚崩溃源。我附上了日志跟踪。我正在寻找任何可以帮助我追踪此事的指针。
回答by CW0007007
The reason for the crash is in your title...
崩溃的原因在你的标题中......
reason: 'NSConcreteAttributedString initWithString:: nil value'
原因：'NSConcreteAttributedString initWithString:: nil 值'
It looks like you are trying to create an attributed string from a string but that string is nil.
看起来您正在尝试从字符串创建属性字符串，但该字符串为零。
Add a guard before you do you NSAttributeString initWithString to make sure the string isn't nil i.e.
在你做之前添加一个守卫 NSAttributeString initWithString 以确保字符串不是 nil 即
if (string) {
NSAttributedString *attributedString = [[NSAttributedString alloc] initWithAttributedString:string];
//other code etc...
}
