为什么 NSString 使我的发布版本崩溃，但在 Xcode 中却可以正常工作？
我的程序从文件中提取 C 样式字符串，将其转换为 NSString 并将其放入 NSMutableArray 中。每次我在 XCode 中运行该程序（无论是调试版还是发布版）时，它都能完美运行。然而，每次我在 XCode 之外运行它时，它都会崩溃，并且报告显示“-[NSPlaceholderString initWithString:]: nil argument'”。这是出现问题的代码行。
input = [[[NSString alloc] initWithString:[NSString stringWithUTF8String:data->acctNames]] mutableCopy];
我也尝试过：
input = [NSString stringWithUTF8String:data->acctNames];
任何人都可以解释这有什么问题吗？
My program pulls in a C style string from a file, converts it to an NSString and places it in an NSMutableArray. Every time I run the program, either Debug or Release version, in XCode it runs perfectly. However every time I run it outside of XCode it crashes and the report says "-[NSPlaceholderString initWithString:]: nil argument'". This is the line of code where the problem occurs.
input = [[[NSString alloc] initWithString:[NSString stringWithUTF8String:data->acctNames]] mutableCopy];
I have also tried this:
input = [NSString stringWithUTF8String:data->acctNames];
Can anyone explain what is wrong with this?
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听起来您正在打开的文件不存在并且字符串未初始化。您应该查看文件路径并查看它是否是绝对路径。也许您正在尝试打开本地目录中的文件，但在构建二进制文件后，运行目录中不存在该文件。
Sounds like the file you are opening doesn't exist and the string is not being initialized. You should look at the file path and see if it is an absolute path. Maybe you are trying to open the file in a local directory and the file doesn't exist in the run directory after you have built the binary.