声明：以下内容转自http://blog.csdn.net/sky_warmer/article/details/45248643
宏定义在很多方面都会使用，例如定义高度、判断iOS系统、工具类，还有诸如文件路径、服务端api接口文档。为了对宏能够快速定位和了解其功能，我们最好在定义的时候将其放入特定的头文件中，下面我抛砖引玉，对一些常用的宏进行分类、分文件定义，希望对大家有所帮助。
DimensMacros.h //状态栏高度 #define STATUS_BAR_HEIGHT 20 //NavBar高度 #define NAVIGATION_BAR_HEIGHT 44 //状态栏 ＋ 导航栏 高度 #define STATUS_AND_NAVIGATION_HEIGHT ((STATUS_BAR_HEIGHT) + (NAVIGATION_BAR_HEIGHT)) //屏幕 rect #define SCREEN_RECT ([UIScreen mainScreen].bounds) #define SCREEN_WIDTH ([UIScreen mainScreen].bounds.size.width) #define SCREEN_HEIGHT ([UIScreen mainScreen].bounds.size.height) #define CONTENT_HEIGHT (SCREEN_HEIGHT - NAVIGATION_BAR_HEIGHT - STATUS_BAR_HEIGHT) //屏幕分辨率 #define SCREEN_RESOLUTION (SCREEN_WIDTH * SCREEN_HEIGHT * ([UIScreen mainScreen].scale)) //广告栏高度 #define BANNER_HEIGHT 215 #define STYLEPAGE_HEIGHT 21 #define SMALLTV_HEIGHT 77 #define SMALLTV_WIDTH 110 #define FOLLOW_HEIGHT 220 #define SUBCHANNEL_HEIGHT 62
2.定义沙盒目录文件的宏
PathMacros.h //文件目录 #define kPathTemp NSTemporaryDirectory() #define kPathDocument [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] #define kPathCache [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0] #define kPathSearch [kPathDocument stringByAppendingPathComponent:@"Search.plist"] #define kPathMagazine [kPathDocument stringByAppendingPathComponent:@"Magazine"] #define kPathDownloadedMgzs [kPathMagazine stringByAppendingPathComponent:@"DownloadedMgz.plist"] #define kPathDownloadURLs [kPathMagazine stringByAppendingPathComponent:@"DownloadURLs.plist"] #define kPathOperation [kPathMagazine stringByAppendingPathComponent:@"Operation.plist"] #define kPathSplashScreen [kPathCache stringByAppendingPathComponent:@"splashScreen"] #endif
3.工具类的宏
UtilsMacros.h //Log utils marco #define ALog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__); #ifdef DEBUG #define DLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__); #else #define DLog(...) #endif #ifdef DEBUG #define ULog(...) //#define ULog(fmt, ...) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:[NSString stringWithFormat:@"%s [Line %d] ", __PRETTY_FUNCTION__, __LINE__] message:[NSString stringWithFormat:fmt, ##__VA_ARGS__] delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil]; [alert show]; } #else #define ULog(...) #endif //System version utils #define SYSTEM_VERSION_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedSame) #define SYSTEM_VERSION_GREATER_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedDescending) #define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending) #define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending) #define SYSTEM_VERSION_LESS_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedDescending) // 获取RGB颜色 #define RGBA(r,g,b,a) [UIColor colorWithRed:r/255.0f green:g/255.0f blue:b/255.0f alpha:a] #define RGB(r,g,b) RGBA(r,g,b,1.0f) #define IsPortrait ([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortrait || [UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortraitUpsideDown) #define IsNilOrNull(_ref) (((_ref) == nil) || ([(_ref) isEqual:[NSNull null]])) //角度转弧度 #define DEGREES_TO_RADIANS(d) (d * M_PI / 180) //大于等于7.0的ios版本 #define iOS7_OR_LATER SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0") //大于等于8.0的ios版本 #define iOS8_OR_LATER SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0") //iOS6时，导航VC中view的起始高度 #define YH_HEIGHT (iOS7_OR_LATER ? 64:0) //获取系统时间戳 #define getCurentTime [NSString stringWithFormat:@"%ld", (long)[[NSDate date] timeIntervalSince1970]]
4.通知Notification相关的宏
NotificationMacros.h //系统Notification定义 #define TNCancelFavoriteProductNotification @"TNCancelFavoriteProductNotification" //取消收藏时 #define TNMarkFavoriteProductNotification @"TNMarkFavoriteProductNotification" //标记收藏时 #define kNotficationDownloadProgressChanged @"kNotficationDownloadProgressChanged" //下载进度变化 #define kNotificationPauseDownload @"kNotificationPauseDownload" //暂停下载 #define kNotificationStartDownload @"kNotificationStartDownload" //开始下载 #define kNotificationDownloadSuccess @"kNotificationDownloadSuccess" //下载成功 #define kNotificationDownloadFailed @"kNotificationDownloadFailed" //下载失败 #define kNotificationDownloadNewMagazine @"kNotificationDownloadNewMagazine"
5.服务端API接口的宏
APIStringMacros.h ////////////////////////////////////////////////////////////////////////////////////////////////// //接口名称相关 #ifdef DEBUG //Debug状态下的测试API #define API_BASE_URL_STRING @"http://boys.test.companydomain.com/api/" #else //Release状态下的线上API #define API_BASE_URL_STRING @"http://www.companydomain.com/api/" #endif //接口 #define GET_CONTENT_DETAIL @"channel/getContentDetail" //获取内容详情(含上一个和下一个) #define GET_COMMENT_LIST @"comment/getCommentList" //获取评论列表 #define COMMENT_LOGIN @"comment/login" //获取评论列表 #define COMMENT_PUBLISH @"comment/publish" //发布评论 #define COMMENT_DELETE @"comment/delComment" //删除评论 #define LOGINOUT @"common/logout" //登出
还有很多其他类型的宏，此处不一一列举
创建一个import所有宏相关的文件Macros.h
Macros.h #import "UtilsMacros.h" #import "APIStringMacros.h" #import "DimensMacros.h" #import "NotificationMacros.h" #import "SharePlatformMacros.h" #import "StringMacros.h" #import "UserBehaviorMacros.h" #import "PathMacros.h"
在xcode项目的pch文件中，导入Macros.h文件
XcodeProjectName-Prefix.pch #ifdef __OBJC__ #import <UIKit/UIKit.h> #import <Foundation/Foundation.h> #import "Macros.h" #endif
问题：什么时候定义成宏定义？什么时候定义成工具类？