转载于：http://blog.csdn.net/hbblzjy/article/details/51859570
//安全释放#defineRELEASE_SAFELY(__Pointer) do{[__Pointer release],__Pointer = nil;} while(0)// 屏幕的物理高度#defineScreenHeight [UIScreen mainScreen].bounds.size.height// 屏幕的物理宽度#defineScreenWidth [UIScreen mainScreen].bounds.size.width// 调试#defineNSLOG_FUNCTION NSLog(@"%s,%d",__FUNCTION__,__LINE__)//----------------------图片类————————————————————————————————————————//读取本地图片#defineLOADIMAGE(file,ext) [UIImage imageWithContentsOfFile:[[NSBundle mainBundle]pathForResource:file ofType:ext]]//定义UIImage对象#defineIMAGE(A) [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:A ofType:nil]]//定义UIImage对象#defineImageNamed(_pointer) [UIImage imageNamed:_pointer]//———————————————————————颜色类———————————————————————————-----—————————————// rgb颜色转换（16进制->10进制）#defineUIColorFromRGB(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]//带有RGBA的颜色设置#defineCOLOR(R, G, B, A) [UIColor colorWithRed:R/255.0 green:G/255.0 blue:B/255.0 alpha:A]// 获取RGB颜色#defineRGBA(r,g,b,a) [UIColor colorWithRed:r/255.0f green:g/255.0f blue:b/255.0f alpha:a]#defineRGB(r,g,b) RGBA(r,g,b,1.0f)//背景色#defineBACKGROUND_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#defineCLEARCOLOR [UIColor clearColor]#pragmamark - color functions#defineRGBCOLOR(r,g,b) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:1]#defineRGBACOLOR(r,g,b,a) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:(a)]//———————————————————————TAG宏———————————————————————————-----—————————————//viewWithTag#defineVIEWWITHTAG(_OBJECT, _TAG)[_OBJECT viewWithTag : _TAG]//———————————————————————单例模式宏———————————————————————————-----—————————————//.h文件处的声明#defineDEFINE_SINGLETON_FOR_HEADER(className) \\+ (className *)shared##className;//.m文件处的声明#defineDEFINE_SINGLETON_FOR_CLASS(className) \\+ (className *)shared##className { \staticclassName *shared##className = nil; \staticdispatch_once_t onceToken; \dispatch_once(&onceToken, ^{ \shared##className = [[self alloc] init]; \}); \returnshared##className; \}//———————————————————————单例模式———————————————————————————-----—————————————staticDataBaseHandle * handle = nil;+ (DataBaseHandle *)shareInstance{@synchronized(self){if(!handle) {handle = [[DataBaseHandle alloc] init];}}returnhandle;}—————————————不用你把所有NSLog的删除或注释，直接修改#if判断的值就行了(1执行,0不执行)——————————————#if1#defineNSLog(FORMAT, ...) fprintf(stderr,"[%s:%d行] %s\n",[[[NSString stringWithUTF8String:__FILE__] lastPathComponent] UTF8String], __LINE__, [[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String]);#else#defineNSLog(FORMAT, ...) nil#endif#defineNEED_OUTPUT_LOG 0#ifNEED_OUTPUT_LOG#defineSLog(xx, ...) NSLog(xx, ##__VA_ARGS__)#defineSLLog(xx, ...) NSLog(@"%s(%d): " xx, __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__)#defineSLLogRect(rect) \SLLog(@"%s x=%f, y=%f, w=%f, h=%f",#rect, rect.origin.x, rect.origin.y, \rect.size.width, rect.size.height)#defineSLLogPoint(pt) \SLLog(@"%s x=%f, y=%f",#pt, pt.x, pt.y)#defineSLLogSize(size) \SLLog(@"%s w=%f, h=%f",#size, size.width, size.height)#defineSLLogColor(_COLOR) \SLLog(@"%s h=%f, s=%f, v=%f",#_COLOR, _COLOR.hue, _COLOR.saturation, _COLOR.value)#defineSLLogSuperViews(_VIEW) \{for(UIView* view = _VIEW; view; view = view.superview) { SLLog(@"%@", view); } }#defineSLLogSubViews(_VIEW) \{for(UIView* viewin[_VIEW subviews]) { SLLog(@"%@", view); } }#else#defineSLog(xx, ...) ((void)0)#defineSLLog(xx, ...) ((void)0)#endif
参考别人的定义：
1.获取屏幕宽度与高度
#defineSCREEN_WIDTH[UIScreen mainScreen].bounds.size.width#defineSCREENH_HEIGHT[UIScreen mainScreen].bounds.size.height//iOS8以后，设备横屏，[UIScreen mainScreen].bounds.size的值是宽大于高的，即iOS8以后这个值跟屏幕方向有关了#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000 // 当前Xcode支持iOS8及以上#define SCREEN_WIDTH ([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)]?[UIScreen mainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale:[UIScreen mainScreen].bounds.size.width)#define SCREENH_HEIGHT ([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)]?[UIScreen mainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale:[UIScreen mainScreen].bounds.size.height)#define SCREEN_SIZE ([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)]?CGSizeMake([UIScreen mainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale,[UIScreen mainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale):[UIScreen mainScreen].bounds.size)#else#define SCREEN_WIDTH [UIScreen mainScreen].bounds.size.width#define SCREENH_HEIGHT [UIScreen mainScreen].bounds.size.height#define SCREEN_SIZE [UIScreen mainScreen].bounds.size#endif
#defineLRNotificationCenter [NSNotificationCenter defaultCenter]
#defineLRRandomColor [UIColor colorWithRed:arc4random_uniform(256)/255.0green:arc4random_uniform(256)/255.0blue:arc4random_uniform(256)/255.0alpha:1.0]
#defineLRRGBColor(r, g, b) [UIColor colorWithRed:(r)/255.0green:(g)/255.0blue:(b)/255.0alpha:1.0]#defineLRRGBAColor(r, g, b, a) [UIColor colorWithRed:(r)/255.0green:(r)/255.0blue:(r)/255.0alpha:a]// clear背景颜色#defineLRClearColor [UIColor clearColor]
项目开发中，我们会在许多地方加上Log，但是发布的时候又不想用这些Log，我们也不可能一个一个的删除，所以自定义Log是必然的！
#ifdefDEBUG#defineLRLog(...) NSLog(@"%s 第%d行 \n %@\n\n",__func__,__LINE__,[NSString stringWithFormat:__VA_ARGS__])#else#defineLRLog(...)#endif
#defineLRWeakSelf(type)__weaktypeof(type)weak##type=type;#defineLRStrongSelf(type)__strongtypeof(type)type=weak##type;
使用方法.png
第二种使用方法，定义完弱引用宏之后，直接敲weak.png
#define LRViewBorderRadius(View, Radius, Width, Color)\\[View.layersetCornerRadius:(Radius)];\[View.layersetMasksToBounds:YES];\[View.layersetBorderWidth:(Width)];\[View.layersetBorderColor:[Color CGColor]]
#define LRDegreesToRadian(x)(M_PI* (x) / 180.0)
#define LRRadianToDegrees(radian) (radian*180.0)/(M_PI)
此宏定义非常好用，但是小伙伴需要CocoaPods导入第三方框架：Toast
使用方法如下：
LRToast(@"网络加载失败");
#define LRToast(str) CSToastStyle *style =[[CSToastStyle alloc]initWithDefaultStyle];\[kWindow makeToast:str duration:0.6 position:CSToastPositionCenter style:style];\kWindow.userInteractionEnabled = NO;\dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.6 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{\kWindow.userInteractionEnabled = YES;\});\
10.设置加载提示框（第三方框架：MBProgressHUD）
此宏定义同上一个类似，如下图：
MBProgressHUD提示框.png
// 加载#definekShowNetworkActivityIndicator() [UIApplication sharedApplication].networkActivityIndicatorVisible = YES// 收起加载#defineHideNetworkActivityIndicator() [UIApplication sharedApplication].networkActivityIndicatorVisible = NO// 设置加载#defineNetworkActivityIndicatorVisible(x) [UIApplication sharedApplication].networkActivityIndicatorVisible = x#definekWindow [UIApplication sharedApplication].keyWindow#definekBackView for (UIView *item in kWindow.subviews) { \if(item.tag ==10000) \{ \[item removeFromSuperview]; \UIView * aView = [[UIView alloc] init]; \aView.frame = [UIScreen mainScreen].bounds; \aView.tag =10000; \aView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.3]; \[kWindow addSubview:aView]; \} \} \#definekShowHUDAndActivity kBackView;[MBProgressHUD showHUDAddedTo:kWindow animated:YES];kShowNetworkActivityIndicator()#definekHiddenHUD [MBProgressHUD hideAllHUDsForView:kWindow animated:YES]#definekRemoveBackView for (UIView *item in kWindow.subviews) { \if(item.tag ==10000) \{ \[UIView animateWithDuration:0.4animations:^{ \item.alpha =0.0; \} completion:^(BOOL finished) { \[item removeFromSuperview]; \}]; \} \} \#definekHiddenHUDAndAvtivity kRemoveBackView;kHiddenHUD;HideNetworkActivityIndicator()
//获取view的frame#definekGetViewWidth(view) view.frame.size.width#definekGetViewHeight(view) view.frame.size.height#definekGetViewX(view) view.frame.origin.x#definekGetViewY(view) view.frame.origin.y//获取图片资源#definekGetImage(imageName) [UIImage imageNamed:[NSString stringWithFormat:@"%@",imageName]]
#defineLRCurrentLanguage ([[NSLocale preferredLanguages] objectAtIndex:0])
#if__has_feature(objc_arc)// ARC#else// MRC#endif
//判断是否为iPhone#defineIS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)//判断是否为iPad#defineIS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)//判断是否为ipod#defineIS_IPOD ([[[UIDevice currentDevice] model] isEqualToString:@"iPod touch"])// 判断是否为 iPhone 5SE#defineiPhone5SE [[UIScreen mainScreen] bounds].size.width ==320.0f&& [[UIScreen mainScreen] bounds].size.height ==568.0f// 判断是否为iPhone 6/6s#defineiPhone6_6s [[UIScreen mainScreen] bounds].size.width ==375.0f&& [[UIScreen mainScreen] bounds].size.height ==667.0f// 判断是否为iPhone 6Plus/6sPlus#defineiPhone6Plus_6sPlus [[UIScreen mainScreen] bounds].size.width ==414.0f&& [[UIScreen mainScreen] bounds].size.height ==736.0f//获取系统版本#defineIOS_SYSTEM_VERSION [[[UIDevice currentDevice] systemVersion] floatValue]//判断 iOS 8 或更高的系统版本#defineIOS_VERSION_8_OR_LATER (([[[UIDevice currentDevice] systemVersion] floatValue] >=8.0)? (YES):(NO))
#ifTARGET_OS_IPHONE//iPhone Device#endif#ifTARGET_IPHONE_SIMULATOR//iPhone Simulator#endif
//获取temp#definekPathTemp NSTemporaryDirectory()//获取沙盒 Document#definekPathDocument [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]//获取沙盒 Cache#definekPathCache [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject]
很多小伙伴都非常烦写GCD的方法，所以在此定义为宏使用更加方便简洁！如下图：
GCD 宏使用方法.png
//GCD - 一次性执行#definekDISPATCH_ONCE_BLOCK(onceBlock) static dispatch_once_t onceToken; dispatch_once(&onceToken, onceBlock);//GCD - 在Main线程上运行#definekDISPATCH_MAIN_THREAD(mainQueueBlock) dispatch_async(dispatch_get_main_queue(), mainQueueBlock);//GCD - 开启异步线程#definekDISPATCH_GLOBAL_QUEUE_DEFAULT(globalQueueBlock) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0), globalQueueBlocl);
很多小伙伴在定义一个常量字符串，都会定义成一个宏，最典型的例子就是服务器的地址。在此所有用宏定义常量字符的小伙伴以后就用const来定义吧！为什么呢 ？我们看看：
宏的用法： 一般字符串抽成宏，代码抽成宏使用。
const用法：一般常用的字符串定义成const（对于常量字符串苹果推荐我们使用const）。
宏与const区别：
1.编译时刻不同，宏属于预编译，const属于编译时刻
2.宏能定义代码，const不能，多个宏对于编译会相对时间较长，影响开发效率，调试过慢，const只会编译一次，缩短编译时间。
3.宏不会检查错误，const会检查错误
通过以上对比，我们以后在开发中如果定义一个常量字符串就用const，定义代码就用宏。我们来看看如何使用const，列举实际项目使用方法如下图：
FANCommonConst.h中声明一个常量字符串.png
FANCommonConst.m中实现一个常量字符串.png
在上图本人只是简单定义几个常量字符串，我们创建一个类只要在.h和.m中包含#import 就可以，然后再.h文件声明一个字符串，在.m中实现就可以了，最后把这个类导入PCH文件中，我们就可任意的发挥啦！
