一些常用的宏定义(很有帮助)

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// 安全释放

#define RELEASE_SAFELY(__Pointer) do{[__Pointer release],__Pointer = nil;} while(0)

// 屏幕的物理高度

#define ScreenHeight [UIScreen mainScreen].bounds.size.height

// 屏幕的物理宽度

#define ScreenWidth [UIScreen mainScreen].bounds.size.width

// 调试

#define NSLOG_FUNCTION NSLog(@"%s,%d",__FUNCTION__,__LINE__)

//----------------------图片————————————————————————————————————————

//读取本地图片

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

//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]

//———————————————————————颜色类———————————————————————————-----—————————————

// 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]

//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]

// 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]

#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)]

//———————————————————————TAG宏———————————————————————————-----—————————————

//viewWithTag

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

//———————————————————————单例模式宏———————————————————————————-----—————————————

//.h文件处的声明

#define DEFINE_SINGLETON_FOR_HEADER(className) \

\

+ (className *)shared##className;

//.m文件处的声明

#define DEFINE_SINGLETON_FOR_CLASS(className) \

\

+ (className *)shared##className { \

static className *shared##className = nil; \

static dispatch_once_t onceToken; \

dispatch_once(&onceToken, ^{ \

shared##className = [[self alloc] init]; \

}); \

return shared##className; \

}

//———————————————————————单例模式———————————————————————————-----—————————————

static DataBaseHandle * handle = nil;

+ (DataBaseHandle *)shareInstance

{

@synchronized(self){

if (!handle) {

handle = [[DataBaseHandle alloc] init];

}

}

return handle;

}

—————————————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)——————————————

#if 1

#define NSLog(FORMAT, ...) fprintf(stderr,"[%s:%d行] %s\n",[[[NSString stringWithUTF8String:__FILE__] lastPathComponent] UTF8String], __LINE__, [[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String]);

#else

#define NSLog(FORMAT, ...) nil

#endif

#define NEED_OUTPUT_LOG 0

#if NEED_OUTPUT_LOG

#define SLog(xx, ...) NSLog(xx, ##__VA_ARGS__)

#define SLLog(xx, ...) NSLog(@"%s(%d): " xx, __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__)

#define SLLogRect(rect) \

SLLog(@"%s x=%f, y=%f, w=%f, h=%f", #rect, rect.origin.x, rect.origin.y, \

rect.size.width, rect.size.height)

#define SLLogPoint(pt) \

SLLog(@"%s x=%f, y=%f", #pt, pt.x, pt.y)

#define SLLogSize(size) \

SLLog(@"%s w=%f, h=%f", #size, size.width, size.height)

#define SLLogColor(_COLOR) \

SLLog(@"%s h=%f, s=%f, v=%f", #_COLOR, _COLOR.hue, _COLOR.saturation, _COLOR.value)

#define SLLogSuperViews(_VIEW) \

{ for (UIView* view = _VIEW; view; view = view.superview) { SLLog(@"%@", view); } }

#define SLLogSubViews(_VIEW) \

{ for (UIView* view in [_VIEW subviews]) { SLLog(@"%@", view); } }

#else

#define SLog(xx, ...) ((void)0)

#define SLLog(xx, ...) ((void)0)

#endif