iOS開發經常使用的宏

時間 2019-11-17

標籤 ios 開發經常使用欄目 iOS 简体版

原文原文鏈接

轉載自：http://www.cocoachina.com/applenews/devnews/2013/0328/5907.htmlhtml

#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)緩存

#define LOADIMAGE(file,ext) [UIImage imageWithContentsOfFile:[[NSBundle mainBundle]pathForResource:file ofType:ext]]app

讀取本地圖片的和imageNamed同樣，可是性能比後者要強不少，兩個參數，前面一個是文件名，後面一個是類型async

例如 imageView.image = LOADIMAGE(@"文件名",@"png");函數

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

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

#define MyLocal(x, ...) NSLocalizedString(x, nil)debug

這樣就不須要填默認的參數了. 對於須要反覆使用的方法比較方便。htm

好比說MyLocal(@"0094") 代替了NSLocalizedString(@"0094", nil)圖片

#define LOADIMAGE(file,ext) [UIImage imageWithContentsOfFile:[[NSBundle mainBundle]pathForResource:file ofType:ext]]

讀取本地圖片的和imageNamed同樣，可是性能比後者要強不少，兩個參數，前面一個是文件名，後面一個是類型

例如 imageView.image = LOADIMAGE(@"文件名",@"png");

在資源不吃緊的狀況下,這種反而是個累贅,由於沒有緩存.

imagenamed只是說要緩存,並且沒法手動清空而已.緩存是好是壞,只能本身斷定.

// rgb顏色轉換（16進制->10進制）
#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]

程序裏常常使用單例,能夠作成一個簡單的宏做爲實現部分,來提升開發效率.

MyClass類頭文件裏定義一個靜態函數: + (MyClass*)sharedMyclass;

實現部分:SYNTHESIZE_SINGLETON_FOR_CLASS(MyClass);

定義宏以下:

#define SYNTHESIZE_SINGLETON_FOR_CLASS(classname) \

static classname *shared##classname = nil; \

+ (classname *)shared##classname \

{ \

@synchronized(self) \

{ \

if (shared##classname == nil) \

{ \