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,其主要目的是为程序员在编程时提供一定的方便,并能在一定程度上提高程序的运行效率,又能减少系统开销。

创建宏文件并引入

因为在 Xcode6以后新建项目的时候不会自动创建 pch 文件了. 那么我们如果想使用全局的宏就要自行创建一个 pch 宏文件, 然后再自行引入

  • Command+N,打开新建文件窗口:ios->other->PCH file,创建一个pch文件:“projectname-Prefix.pch”
  • 将building setting中的precompile header选项的路径添加“$(SRCROOT)/项目名称/pch文件名”(例如:$(SRCROOT)/Project/PrefixHeader.pch)
  • 将Precompile Prefix Header为YES,预编译后的pch文件会被缓存起来,可以提高编译速度
  • 编译一下程序,如果有错误检查一下添加的路径是否正确。

定义尺寸类的宏

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//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

定义沙盒目录文件的宏

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//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

工具类的宏

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// rgb颜色转换(16进制->10进制)
#define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]
// 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)
//背景色
#define BACKGROUND_COLOR [UIColor colorWithRed:242.0/255.0 green:236.0/255.0 blue:231.0/255.0 alpha:1.0]
//清除背景色
#define CLEARCOLOR [UIColor clearColor]


#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]]
//判断是真机还是模拟器
#if TARGET_OS_IPHONE
//iPhone Device
#endif
#if TARGET_IPHONE_SIMULATOR
//iPhone Simulator
#endif
//定义UIImage对象
#define IMAGE(A) [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:A ofType:nil]]
//定义UIImage对象
#define ImageNamed(_pointer) [UIImage imageNamed:_pointer]
//可拉伸的图片
#define ResizableImage(name,top,left,bottom,right) [[UIImage imageNamed:name] resizableImageWithCapInsets:UIEdgeInsetsMake(top,left,bottom,right)]
#define ResizableImageWithMode(name,top,left,bottom,right,mode) [[UIImage imageNamed:name] resizableImageWithCapInsets:UIEdgeInsetsMake(top,left,bottom,right) resizingMode:mode]
//方正黑体简体字体定义
#define FONT(F) [UIFont fontWithName:@"FZHTJW--GB1-0" size:F]

通知Notification相关的宏

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//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"

服务端API接口的宏

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//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

这些只是宏的基本用法,了解更多请点击

原文地址:https://www.cnblogs.com/SensenCoder/p/5134621.html