％d格式化为32位和64位

Question

NSInteger precedence = [self operatorPrecedence];
[d appendFormat:@"precedence:%d, ", precedence];

gives:

Warning: Format specifies type 'int' but the argument has type 'NSInteger' (aka 'long')

and Xcode suggests to change %d to %ld .

However, it only works for either 32-bit or 64-bit target, as NSInteger is:

 #if __LP64__ || (TARGET_OS_EMBEDDED && !TARGET_OS_IPHONE) || TARGET_OS_WIN32 || NS_BUILD_32_LIKE_64
 typedef long NSInteger;
 typedef unsigned long NSUInteger;
 #else
 typedef int NSInteger;
 typedef unsigned int NSUInteger;
 #endif

What's the best way to kill the warning, for both 32-bit and 64-bit targets?

Answer 1

Follow the instructions in Apple's 64-Bit Transition Guide .

For an NSInteger , use %ld and cast the value to long .

[d appendFormat:@"precedence:%ld, ", (long)precedence];

Answer 2

Try this

UPD:

NSInteger precedence = [self operatorPrecedence];
[d appendFormat:@"precedence:%ld, ", (long)precedence];