由会员发起的一个话题：
收集起来，丢到一个头文件中，这样开发起来就快多啦！我先分享一些，大家可以拿出自己私藏的，盖楼，吼吼～
#define NavigationBar_HEIGHT 44
#define SCREEN_WIDTH ([UIScreen mainScreen].bounds.size.width)#define SCREEN_HEIGHT ([UIScreen mainScreen].bounds.size.height)#define SAFE_RELEASE(x) [x release];x=nil#define IOS_VERSION [[[UIDevice currentDevice] systemVersion] floatValue]#define CurrentSystemVersion ([[UIDevice currentDevice] systemVersion]) #define CurrentLanguage ([[NSLocale preferredLanguages] objectAtIndex:0]) #define BACKGROUND_COLOR [UIColor colorWithRed:242.0/255.0 green:236.0/255.0 blue:231.0/255.0 alpha:1.0] //use dlog to print while in debug model#ifdef DEBUG# define DLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);#else# define DLog(...)#endif #define isRetina ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 960), [[UIScreen mainScreen] currentMode].size) : NO)#define iPhone5 ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 1136), [[UIScreen mainScreen] currentMode].size) : NO)#define isPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) #if TARGET_OS_IPHONE//iPhone Device#endif #if TARGET_IPHONE_SIMULATOR//iPhone Simulator#endif //ARC#if __has_feature(objc_arc) //compiling with ARC#else // compiling without ARC#endif //G－C－D#define BACK(block) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), block)#define MAIN(block) dispatch_async(dispatch_get_main_queue(),block) #define USER_DEFAULT [NSUserDefaults standardUserDefaults]#define ImageNamed(_pointer) [UIImage imageNamed:[UIUtil imageName:_pointer]] #pragma mark - common functions #define RELEASE_SAFELY(__POINTER) { [__POINTER release]; __POINTER = nil; } #pragma mark - degrees/radian functions #define degreesToRadian(x) (M_PI * (x) / 180.0)#define radianToDegrees(radian) (radian*180.0)/(M_PI) #pragma mark - color functions #define RGBCOLOR(r,g,b) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:1]#define RGBACOLOR(r,g,b,a) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:(a)]#define ITTDEBUG#define ITTLOGLEVEL_INFO 10#define ITTLOGLEVEL_WARNING 3#define ITTLOGLEVEL_ERROR 1 #ifndef ITTMAXLOGLEVEL #ifdef DEBUG #define ITTMAXLOGLEVEL ITTLOGLEVEL_INFO#else #define ITTMAXLOGLEVEL ITTLOGLEVEL_ERROR#endif #endif // The general purpose logger. This ignores logging levels.#ifdef ITTDEBUG #define ITTDPRINT(xx, ...) NSLog(@"%s(%d): " xx, __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__)#else #define ITTDPRINT(xx, ...) ((void)0)#endif // Prints the current method's name.#define ITTDPRINTMETHODNAME() ITTDPRINT(@"%s", __PRETTY_FUNCTION__) // Log-level based logging macros.#if ITTLOGLEVEL_ERROR <= ITTMAXLOGLEVEL #define ITTDERROR(xx, ...) ITTDPRINT(xx, ##__VA_ARGS__)#else #define ITTDERROR(xx, ...) ((void)0)#endif #if ITTLOGLEVEL_WARNING <= ITTMAXLOGLEVEL #define ITTDWARNING(xx, ...) ITTDPRINT(xx, ##__VA_ARGS__)#else #define ITTDWARNING(xx, ...) ((void)0)#endif #if ITTLOGLEVEL_INFO <= ITTMAXLOGLEVEL #define ITTDINFO(xx, ...) ITTDPRINT(xx, ##__VA_ARGS__)#else #define ITTDINFO(xx, ...) ((void)0)#endif #ifdef ITTDEBUG #define ITTDCONDITIONLOG(condition, xx, ...) { if ((condition)) { \ ITTDPRINT(xx, ##__VA_ARGS__); \ } \ } ((void)0)#else #define ITTDCONDITIONLOG(condition, xx, ...) ((void)0)#endif #define ITTAssert(condition, ...) \do { \ if (!(condition)) { \ [[NSAssertionHandler currentHandler] \ handleFailureInFunction:[NSString stringWithUTF8String:__PRETTY_FUNCTION__] \ file:[NSString stringWithUTF8String:__FILE__] \ lineNumber:__LINE__ \ description:__VA_ARGS__]; \ } \} while(0)
会员：
#define LOADIMAGE(file,ext) [UIImage imageWithContentsOfFile:[[NSBundle mainBundle]pathForResource:file ofType:ext]]
读取本地图片的 和imageNamed一样，但是性能比后者要强很多，两个参数，前面一个是 文件名，后面一个是类型
例如 imageView.image = LOADIMAGE(@"文件名",@"png");
会员：
#define WIDTH [[UIScreen mainScreen] bounds].size.width#define HEIGHT [[UIScreen mainScreen] bounds].size.height
会员：
#define VIEWWITHTAG(_OBJECT, _TAG) [_OBJECT viewWithTag : _TAG] 会员：#define MyLocal(x, ...) NSLocalizedString(x, nil)这样就不需要填默认的参数了. 对于需要反复使用的方法比较方便。
比如说MyLocal(@"0094") 代替了NSLocalizedString(@"0094", nil)
会员：
引用第1楼鸡累基类鸡肋于2013-03-26 14:58发表的 :#define LOADIMAGE(file,ext) [UIImage imageWithContentsOfFile:[[NSBundle mainBundle]pathForResource:file ofType:ext]]读取本地图片的 和imageNamed一样，但是性能比后者要强很多，两个参数，前面一个是 文件名，后面一个是类型
例如 imageView.image = LOADIMAGE(@"文件名",@"png");
在资源不吃紧的情况下,这种反而是个累赘,因为没有缓存.imagenamed只是说要缓存,而且无法手动清空而已.缓存是好是坏,只能自己判定.
会员：
// 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]
[2013.6.9更新]
会员： 检查系统版本
我也来一个我用过的，检查系统版本的
1.
2.#define SYSTEM_VERSION_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedSame)
3.#define SYSTEM_VERSION_GREATER_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedDescending)
4.#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)
5.#define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)
6.#define SYSTEM_VERSION_LESS_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedDescending)
会员：
//清除背景色
#define CLEARCOLOR [UIColor clearColor]
//定义UIImage对象
#define IMAGE(A) [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:A ofType:nil]]
//带有RGBA的颜色设置
#define COLOR(R, G, B, A) [UIColor colorWithRed:R/255.0 green:G/255.0 blue:B/255.0 alpha:A]
//方正黑体简体字体定义
#define FONT(F) [UIFont fontWithName:@"FZHTJW--GB1-0" size:F]
//安全删除对象
#define SAFE_DELETE(P) if(P) { [P release], P = nil; }
//接口API
#define APIURL @"http://xxxxx/"
//登录
#define APILogin [APIURL stringByAppendingString:@"Login"] //登录API
会员：
// 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)
会员：
最近我也开始整理常用的，目前只有ALog DLog的
https://github.com/linktoming/MMMacro
推荐放在github上管理，大家fock 然后根据各自的需要修改
和github的gitignore一样
会员：
//单例化一个类
#define SYNTHESIZE_SINGLETON_FOR_CLASS(classname) \
\
static classname *shared##classname = nil; \
\
+ (classname *)shared##classname \
{ \
@synchronized(self) \
{ \
if (shared##classname == nil) \
{ \
shared##classname = [[self alloc] init]; \
} \
} \
\
return shared##classname; \
} \
\
+ (id)allocWithZone:(NSZone *)zone \
{ \
@synchronized(self) \
{ \
if (shared##classname == nil) \
{ \
shared##classname = [super allocWithZone:zone]; \
return shared##classname; \
} \
} \
\
return nil; \
} \
\
- (id)copyWithZone:(NSZone *)zone \
{ \
return self; \
}
附上原作者声明...
//
// SynthesizeSingleton.h
// CocoaWithLove
//
// Created by Matt Gallagher on 20/10/08.
// Copyright 2009 Matt Gallagher. All rights reserved.
//
// Permission is given to use this source code file without charge in any
// project, commercial or otherwise, entirely at your risk, with the condition
// that any redistribution (in part or whole) of source code must retain
// this copyright and permission notice. Attribution in compiled projects is
// appreciated but not required.
//
会员：
#if DEBUG
#define NSLog(FORMAT, ...) fprintf(stderr,"\nfunction:%s line:%d content:%s\n", __FUNCTION__, __LINE__, [[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String]);
#else
#define NSLog(FORMAT, ...) nil
#endif
主要是格式化了内容
期待此贴有更全面、更丰富的内容，你的一小步，大家一大步......
原帖地址：