iOS 常用的宏

原文地址：http://www.cocoachina.com/applenews/devnews/2013/0328/5907.html

#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：鸡累基类鸡肋

#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：anglepro
#define   WIDTH   [[UIScreen mainScreen] bounds].size.width
#define  HEIGHT  [[UIScreen mainScreen] bounds].size.height

会员：l20061642
#define VIEWWITHTAG(_OBJECT, _TAG)    [_OBJECT viewWithTag : _TAG]

会员：pri_est
#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：oopp
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beyondvincent

// 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]

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：http://www.cocoachina.com/bbs/read.php?tid=137317&page=1