我需要保留 NSAlert AlertDidEnd 的 contextInfo 吗？
我需要将带有几个选项的 NSDictionary 传递给
NSAlert - (void)beginSheetModalForWindow:(NSWindow *)window modalDelegate:(id)modalDelegate didEndSelector:(SEL)alertDidEndSelector contextInfo:(void *)contextInfo
文档没有说明是否必须保留 contextInfo。现在，我在显示警报之前保留它并在 alertDidEnd: 中释放它，但最好确定是否有必要这样做。
I need to pass an NSDictionary with a couple of options to
NSAlert - (void)beginSheetModalForWindow:(NSWindow *)window modalDelegate:(id)modalDelegate didEndSelector:(SEL)alertDidEndSelector contextInfo:(void *)contextInfo
The docs don't say anything about if the contextInfo has to be retained or not. Right now I'm retaining it before showing the alert and releasing it in alertDidEnd:, but it would be nice to know for sure if that is necessary.
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由于
contextInfo被认为是“原始”C 指针 (void *) 并且可以是任何内容，因此管理内存是您的责任（如果您传递的是 Objective- C对象：保留它）。Since
contextInfois considered to be a "raw" C pointer (void *) and can be anything, it's your responsibility to manage memory (if you're passing an Objective-C object: to retain it).