在iOS和OSX上使用unsigned int和unsigned long编译NSLog而不发出警告 [英] Compile NSLog with unsigned int and unsigned long on iOS and OSX without a warning

问题描述

在iOS NSUInteger 是 unsigned int ，在OSX上它是 unsigned long 。如何制作类似

On iOS NSUInteger is a unsigned int, on OSX it is a unsigned long. How can I make a print statement like

 NSLog(@"Array has %d elements.",[array count]);

在没有警告的情况下在两个平台上编译？我当然可以使用 #ifdef #else #endif 构造，但这将添加4行代码。我也可以将返回值强制转换为unsigned int。有更短的解决方案吗？

compile on both platforms without a warning? I can of course use an #ifdef #else #endif construct but that will add 4 lines of code. I could also cast the return value to unsigned int. Is there a shorter solution?

推荐答案

两个中较大者的演员怎么样？

How about a cast up to the larger of the two?

NSLog(@"Array has %ld elements.",(unsigned long)[array count]);

iOS中没有任何警告，我认为这是OSX中的无操作。

No warning in iOS, and I think it's a no-op in OSX.

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