xcode 在 iOS 和 OSX 上使用 unsigned int 和 unsigned long 编译 NSLog 没有警告
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Compile NSLog with unsigned int and unsigned long on iOS and OSX without a warning
提问by hanno
On iOS NSUIntegeris a unsigned int, on OSX it is a unsigned long. How can I make a print statement like
在 iOS 上NSUInteger是一个unsigned int，在 OSX 上它是一个unsigned long. 我怎样才能做出像这样的打印声明
NSLog(@"Array has %d elements.",[array count]);
compile on both platforms without a warning? I can of course use an #ifdef #else #endifconstruct but that will add 4 lines of code. I could also cast the return value to unsigned int. Is there a shorter solution?
在没有警告的情况下在两个平台上编译？我当然可以使用一个#ifdef #else #endif构造，但这会增加 4 行代码。我也可以将返回值转换为 unsigned int。有更短的解决方案吗？
回答by danh
How about a cast up to the larger of the two?
铸造到两者中较大的一个怎么样？
NSLog(@"Array has %ld elements.",(unsigned long)[array count]);
No warning in iOS, and I think it's a no-op in OSX.
在 iOS 中没有警告，我认为它在 OSX 中是空的。
回答by Nguy?n Kh?c Hoàng
How about a cast up to the larger of the two?
铸造到两者中较大的一个怎么样？
NSLog(@"Array has %ld elements.",(unsigned long)[array count]);
No warning in iOS, and I think it's a no-op in OSX.
