大家都是知道使用宏不僅方便，而且可以提高開發效率。下面總結了iOS開發過程中的一些常用宏，會持續的往里面添加。
//字符串是否為空
#define kStringIsEmpty(str) ([str isKindOfClass:[NSNull class]] || str == nil || [str length] < 1 ? YES : NO )
//數組是否為空
#define kArrayIsEmpty(array) (array == nil || [array isKindOfClass:[NSNull class]] || array.count == 0)
//字典是否為空
#define kDictIsEmpty(dic) (dic == nil || [dic isKindOfClass:[NSNull class]] || dic.allKeys == 0)
//是否是空對象
#define kObjectIsEmpty(_object) (_object == nil \
|| [_object isKindOfClass:[NSNull class]] \
|| ([_object respondsToSelector:@selector(length)] && [(NSData *)_object length] == 0) \
|| ([_object respondsToSelector:@selector(count)] && [(NSArray *)_object count] == 0))
//獲取屏幕寬度與高度
#define kScreenWidth \
([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)] ? [UIScreenmainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale : [UIScreen mainScreen].bounds.size.width)
#define kScreenHeight \
([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)] ? [UIScreenmainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale : [UIScreen mainScreen].bounds.size.height)
#define kScreenSize \
([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)] ? CGSizeMake([UIScreenmainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale,[UIScreenmainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale) : [UIScreen mainScreen].bounds.size)
//一些縮寫
#define kApplication ? ? ? ?[UIApplication sharedApplication]
#define kKeyWindow ? ? ? ? ?[UIApplication sharedApplication].keyWindow
#define kAppDelegate ? ? ? ?[UIApplication sharedApplication].delegate
#define kUserDefaults ? ? ? [NSUserDefaults standardUserDefaults]
#define kNotificationCenter [NSNotificationCenter defaultCenter]
//APP版本號
#define kAppVersion [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"]
//系統版本號
#define kSystemVersion [[UIDevice currentDevice] systemVersion]
//獲取當前語言
#define kCurrentLanguage ([[NSLocale preferredLanguages] objectAtIndex:0])
//判斷是否為iPhone
#define kISiPhone (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
//判斷是否為iPad
#define kISiPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
//獲取沙盒Document路徑
#define kDocumentPath [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]
//獲取沙盒temp路徑
#define kTempPath NSTemporaryDirectory()
//獲取沙盒Cache路徑
#define kCachePath [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject]
//判斷是真機還是模擬器
#if TARGET_OS_IPHONE
//真機
#endif
#if TARGET_IPHONE_SIMULATOR
//模擬器
#endif
//開發的時候打印，但是發布的時候不打印的NSLog
#ifdef DEBUG
#define NSLog(...) NSLog(@"%s 第%d行 \n %@\n\n",__func__,__LINE__,[NSString stringWithFormat:__VA_ARGS__])
#else
#define NSLog(...)
#endif
//顏色
#define kRGBColor(r, g, b) ? ? [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
#define kRGBAColor(r, g, b, a) [UIColor colorWithRed:(r)/255.0 green:(r)/255.0 blue:(r)/255.0 alpha:a]
#define kRandomColor ?KRGBColor(arc4random_uniform(256)/255.0,arc4random_uniform(256)/255.0,arc4random_uniform(256)/255.0)
#define kColorWithHex(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]
//弱引用/強引用
#define kWeakSelf(type) ? __weak typeof(type) weak##type = type;
#define kStrongSelf(type) __strong typeof(type) type = weak##type;
//由角度轉換弧度
#define kDegreesToRadian(x) ? ? ?(M_PI * (x) / 180.0)
//由弧度轉換角度
#define kRadianToDegrees(radian) (radian * 180.0) / (M_PI)
//獲取一段時間間隔
#define kStartTime CFAbsoluteTime start = CFAbsoluteTimeGetCurrent();
#define kEndTime ? NSLog(@"Time: %f", CFAbsoluteTimeGetCurrent() - start)
