iOS 项目中的文件 - projectname-Info.plist - projectname-Prefix.pch

1 #define A 1
2 #define B 2

1 #import "myhead.h"

1 #ifdef __OBJC__
2 
3 #import <Foundation/Foundation.h>
4 #import <UIKit/UIKit.h>
5 
6 #endif

 1 #ifdef __OBJC__
 2 
 3 #import <Foundation/Foundation.h>
 4 #import <UIKit/UIKit.h>
 5 
 6 #ifdef DEBUG
 7 #define MyNSLog(...) NSLog(__VA_ARGS__)
 8 #else
 9 #define MyNSLog(...)
10 #endif
11 
12 #endif

1     MyNSLog(@"测试 %d - %d", A, B);