ObjectiveC的NSLog和Printf语句之间的区别 [英] Difference between NSLog and Printf statement for ObjectiveC

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本文介绍了ObjectiveC的NSLog和Printf语句之间的区别的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我想知道Objective-C中 NSLog Printf 语句之间的区别(对于应用程序)目的......!)

I want to know about the difference between the NSLog and the Printf statement in Objective-C (for application purpose...!)

为什么所有开发人员都使用 NSLog 而不是 Printf

Why do all developer use NSLog instead of Printf ?

两者看起来相似,但内部工作有什么不同?

Both look similar, but what is the difference in internal working?

在何时可以区分它们?

推荐答案


  • printf()是一个C标准库函数,接受一个C字符串常量( const char * )作为格式参数。 printf()写入stdout。

    • printf() is a C standard library function, accepting a C string constant (const char *) as its format argument. printf() writes to stdout.

      NSLog()是一个Foundation函数,接受一个常量NSString作为格式,并具有一个扩展格式说明符集(例如, printf()不打印由%@ NSLog()确实如此)。
      NSLog()还会在打印实际格式之前打印进程名称和日期并写入sdterr。

      NSLog() is a Foundation function, accepting a constant NSString as format, and has an extended format specifier set (for example, printf() does't print objects specified by %@, NSLog() does). NSLog() also prints the process name and date before it prints the actual format and writes to sdterr.

      基本上,我们可以说 NSLog()是一个扩展的 printf()
      Objective-C的样式函数(更准确地说,Cocoa和Cocoa Touch)和特定用途。

      Basically, we can say that NSLog() is an extended printf() Style function for Objective-C (more precisely, Cocoa and Cocoa Touch) and specific purposes.

      这篇关于ObjectiveC的NSLog和Printf语句之间的区别的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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